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PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
Burr-Brown Audio
SLAS831D – MARCH 2014 – REVISED MARCH 2018
PCM186x 4-Channel or 2-Channel, 192-kHz, Audio ADCs
1 Features
2 Applications
•
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1
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High SNR Performance:
– 110-dB SNR (PCM1861/63/65)
– 103-dB SNR (PCM1860/62/64)
ADC Sample Rate (fS) = 8 kHz to 192 kHz
Up To Four Independent ADC Channels Available
Single-Ended, 2.1-VRMS Full-Scale (FS) Input
Differential, 4.2-VRMS FS Input
Hardware (HW) Control: PCM1860/61
Software (SW) Control (I2C or SPI):
PCM1862/63/64/65
Support for Up To Four Digital Microphones
(SW-Controlled Devices)
Programmable Gain Amplifier (PGA):
– Fixed Gain: 0 dB, 12 dB, 32 dB
(PCM1860/61)
– SW-Controlled Gain: –12 dB to +32 dB
(PCM1862/63/64/65)
Integrated High-Performance Audio PLL
Single 3.3-V Power-Supply Operation
Power Dissipation at 3.3 V:
– < 85 mW (PCM1860/61/62/63)
– < 145 mW (PCM1864/65)
Energysense Audio Content Detector for Auto
System Wakeup and Sleep
Master or Slave Audio Interface
Automatic PGA Clipping Suppression Control
PCB-Footprint Compatibility Across All Devices
Home Theater and TV
Voice Controlled Devices
Bluetooth® Speaker
Microphone Array Processors
3 Description
The PCM186x family (PCM1860, PCM1861,
PCM1862, PCM1863, PCM1864, and PCM1865) of
audio front-end devices take a new approach to
audio-function integration to ease compliance with
European Ecodesign legislation, while enabling highperformance end products at reduced cost. The
PCM186x support single-supply operation at 3.3 V,
and offer an integrated programable gain amplifier
(PGA) in a small package; this configuration makes it
feasible to implement smaller and smarter products at
a reduced cost.
The PCM186x audio front end supports single-ended
input levels from small-mV microphone inputs to 2.1VRMS line inputs, without external resistor dividers.
The front-end mixer (MIX), multiplexer (MUX), and
PGA also support differential (Diff), pseudodifferential, and single-ended (SE) inputs, making
these devices an ideal interface for products that
require interference suppression. The PCM186x
integrate many system-level functions that assist or
replace some DSP functions.
An integrated band-gap voltage reference provides
excellent PSRR, so that a dedicated analog 3.3-V rail
may not be required.
Device Information(1)
PART NUMBER
PCM186x
PACKAGE
TSSOP (30)
BODY SIZE (NOM)
7.80 mm × 4.40 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
Simplified Application Diagram
IN
MIC
DOUT
PCM186x
BCK
DOUT
TMS320C5535
PCM5121
TPA3116
LRCK
SW mix
IN
LINE
BCK
PCM5100
TPA3116
IN
USB
LRCK
Copyright © 2017, Texas Instruments Incorporated
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
SLAS831D – MARCH 2014 – REVISED MARCH 2018
www.ti.com
Table of Contents
1
2
3
4
5
6
7
Features .................................................................. 1
Applications ........................................................... 1
Description ............................................................. 1
Revision History..................................................... 2
Device Comparison Table..................................... 7
Pin Configuration and Functions ......................... 8
Specifications....................................................... 12
7.1
7.2
7.3
7.4
7.5
Absolute Maximum Ratings .................................... 12
ESD Ratings............................................................ 12
Recommended Operating Conditions..................... 12
Thermal Information ................................................ 12
Electrical Characteristics: PGA and ADC AC
Performance............................................................. 13
7.6 Electrical Characteristics: DC ................................. 14
7.7 Electrical Characteristics: Digital Filter.................... 16
7.8 Timing Requirements: External Clock..................... 16
7.9 Timing Requirements: I2C Control Interface .......... 17
7.10 Timing Requirements: SPI Control Interface ....... 18
7.11 Timing Requirements: Audio Data Interface for
Slave Mode .............................................................. 19
7.12 Timing Requirements: Audio Data Interface for
Master Mode ............................................................ 20
7.13 Typical Characteristics .......................................... 21
8
9
Parameter Measurement Information ................ 23
Detailed Description ............................................ 25
9.1
9.2
9.3
9.4
9.5
Overview .................................................................
Functional Block Diagrams .....................................
Features Description ..............................................
Device Functional Modes........................................
Programming...........................................................
25
25
28
60
62
10 Application and Implementation........................ 70
10.1 Application Information.......................................... 70
10.2 Typical Applications .............................................. 75
11 Power Supply Recommendations ..................... 79
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
Power-Supply Distribution and Requirements ...... 79
1.8-V Support ........................................................ 79
Brownout Conditions ............................................. 79
Power-Up Sequence ............................................. 80
Lowest Power-Down Modes ................................. 80
Power-On Reset Sequencing Timing Diagram .... 81
Power Connection Examples................................ 82
Fade In .................................................................. 83
12 Layout................................................................... 84
12.1 Layout Guidelines ................................................. 84
12.2 Layout Example .................................................... 85
13 Register Maps...................................................... 85
13.1 Register Map Description...................................... 85
13.2 Register Map Summary ........................................ 86
13.3 Page 0 Registers ................................................. 89
13.4 Page 1 Registers ............................................... 129
13.5 Page 3 Registers ............................................... 132
13.6 Page 253 Registers ........................................... 133
14 Device and Documentation Support ............... 134
14.1 Documentation Support ......................................
14.2 Related Links ......................................................
14.3 Receiving Notification of Documentation
Updates..................................................................
14.4 Community Resources........................................
14.5 Trademarks .........................................................
14.6 Electrostatic Discharge Caution ..........................
14.7 Glossary ..............................................................
134
134
134
134
134
134
134
15 Mechanical, Packaging, and Orderable
Information ......................................................... 135
4 Revision History
NOTE: Page numbers for previous revisions may differ from page numbers in the current version.
Changes from Revision C (August 2014) to Revision D
Page
•
Added PCM1860, PCM1862, and PCM1864 and related content to this data sheet; these devices were previously in
a separate data sheet (SLASE55A) ....................................................................................................................................... 1
•
Changed title for clarity........................................................................................................................................................... 1
•
Changed Feature bullets to include new devices................................................................................................................... 1
•
Added Feature bullets to clarify hardware- and software-controlled devices......................................................................... 1
•
Changed Application from "Automotive Head Units" to "Voice Controlled Devices".............................................................. 1
•
Changed Description section text to clarify 3.3-V supply, integrated PGA, and additional front-end features ...................... 1
•
Changed Simplified Application Diagram to combine two previous figures into one figure ................................................... 1
•
Deleted Typ Performance (3.3-V Supply, –1 dB-FS Input) table; redundant content ............................................................ 7
•
Changed Device Comparison Table; updated for clarity........................................................................................................ 7
•
Changed reference voltage output dcoupling point typical value from 0.5 VCC to 0.5 AVDD in VREF pin description........ 9
•
Changed XO (pin 9) type from "—" to "Digital output" in both Pin Functions tables ............................................................. 9
•
Changed "latch enable" to "word clock" in LRCK pin description ......................................................................................... 9
•
Changed reference voltage output dcoupling point typical value from 0.5 VCC to 0.5 AVDD in VREF pin description ..... 11
2
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www.ti.com
SLAS831D – MARCH 2014 – REVISED MARCH 2018
Revision History (continued)
•
Changed "latch enable" to "word clock" in LRCK pin description ....................................................................................... 11
•
Added operating ambient temperature and junction temperature to Absolute Maximum Ratings table .............................. 12
•
Changed ground voltage differences range from "AGND, DGND" to "AGND to DGND" ................................................... 12
•
Changed storage temperature max value from 125°C to 150°C.......................................................................................... 12
•
Changed CDM value from ±1500 V to ±750 V..................................................................................................................... 12
•
Changed "Operating junction temperature range" to "Operating ambient temperature, TA" in Recommended
Operating Conditions table ................................................................................................................................................... 12
•
Changed Thermal Characteristics table to Thermal Information table ................................................................................. 12
•
Changed Electrical Characteristics: Primary PGA and ADC performance to include secondary ADC performance
data, and deleted separate Electrical Characteristics: Secondary ADC Performance table ............................................... 13
•
Added new table note to clarify test condition at 32-dB PGA gain....................................................................................... 13
•
Added min value of 85 dB to input channel signal-to-noise ratio for 32 dB ......................................................................... 13
•
Changed input channel signal-to-noise ratio for 32 dB typical value from 93 dB to 90 dB .................................................. 13
•
Added min value of –76 dB to input channel THD+N, differential input for 32 dB .............................................................. 13
•
Deleted "per input pin" and "out of phase" from full-scale voltage input parameter in Electrical Characteristics ................ 13
•
Changed input channel signal-to-noise ratio, single-ended input value for PCM1865 from 110 dB to 106 dB;
differential conditions used previously.................................................................................................................................. 13
•
Changed "Energysense Detection Threshold" to "Default Energysense Signal Detection Threshold" in Electrical
Characteristics, Secondary ADC Performance .................................................................................................................... 13
•
Changed secondary ADC sampling rate from "same as audio sampling rate" to min of 8 kHz and max of 192 kHz ......... 13
•
Changed Electrical Characteristics, DC conditions from master to slave mode; system clock from 256 × fS to 512 x fS.... 14
•
Changed POWER section of the Electrical Characteristics, DC; updated section structure for clarity................................ 14
•
Deleted all rows with XTAL as condition; not required for normal operation ....................................................................... 14
•
Deleted all rows with Powerdown; not a valid operating mode ........................................................................................... 14
•
Changed AVDD current typ value for 2-channel, 3.3-V, active mode from 16 mA to 18 mA .............................................. 14
•
Changed Total power value for 2-channel, 3.3 V, sleep mode from 24 mW to 17.6 mW.................................................... 14
•
Changed DVDD current for 2-channel, 3.3 V, standby mode from 353 µA to 0.015 mA..................................................... 14
•
Changed Total power for 2-channel, 3.3 V, standby mode for software device from 0.59 mW to 0.64 mW ...................... 14
•
DVDD current for 2-channel, 3.3 V and 1.8 V active mode typ value from 10 µA to 0.015 mA .......................................... 14
•
Changed Total power for 2-channel, 3.3 V and 1.8 V active mode from 68 mW to 69.2 mW ............................................. 14
•
Changed Total power for 4-channel, 3.3 V, active mode from 145 mW to 135.3 mW ....................................................... 14
•
Changed Total power for 4-channel, 3.3 V and 1.8 V, active mode from 128 mW to 117.3 mW ........................................ 15
•
Deleted redundant text "Valid with recommended values on analog rails (AVDD, VREF, and so on)" from PSRR ........... 15
•
Changed "HPF frequency response" to "HPF –3-dB cutoff frequency" in Electrical Characteristics: Digital Filter.............. 16
•
Added maximum BCK frequency rows to Timing Requirements, External Clock table ....................................................... 16
•
Changed all FFT plot X axes from log scale to linear scale................................................................................................. 21
•
Added Figure 7 ..................................................................................................................................................................... 21
•
Changed Figure 9................................................................................................................................................................. 21
•
Deleted previous Figure 11 and Figure 12 ........................................................................................................................... 21
•
Added Figure 11 ................................................................................................................................................................... 21
•
Added Figure 13 ................................................................................................................................................................... 22
•
Added Figure 15 ................................................................................................................................................................... 22
•
Changed Overview section for clarity ................................................................................................................................... 25
•
Deleted Terminology section; moved content to Overview section...................................................................................... 25
•
Added Feature Description section, and moved existing content here ................................................................................ 28
•
Changed text in Analog Front End section for clarity ........................................................................................................... 28
Copyright © 2014–2018, Texas Instruments Incorporated
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3
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PCM1863, PCM1864, PCM1865
SLAS831D – MARCH 2014 – REVISED MARCH 2018
www.ti.com
Revision History (continued)
•
Changed Mic Bias section; internal resistor is a terminating resistor................................................................................... 29
•
Deleted Figure 21 and Figure 22 from Mic Bias section ...................................................................................................... 29
•
Added note stating that clocks are required to be running in order to change PGA in the Programmable Gain
Amplifier section ................................................................................................................................................................... 31
•
Added text to clarify digital PGA update use in Programmable Gain Amplifier section ....................................................... 31
•
Changed note to clarify that the full scale moves to 4.2 VRMS when in differential mode at the end of the
Programmable Gain Amplifier section .................................................................................................................................. 31
•
Added new paragraph to end of Stereo PCM Sources section............................................................................................ 33
•
Changed Figure 33; clock tree updated and corrected ........................................................................................................ 36
•
Added new paragraph to target ADC, DSP1 and DSP2 clock rates in Device Clock Distribution and Generation section 36
•
Changed Clock Configuration and Selection section; relevant to hardware-controlled devices only .................................. 37
•
Added new paragraph regarding register MST_SCK_SRC to Clock Sources for Software-Controlled Devices section .... 37
•
Added note ("In Master Mode on..") to Clock Sources for Software-Controlled Devices section ........................................ 38
•
Changed Table 7; updated descriptions for clarity ............................................................................................................... 38
•
Changed "CLK_DIV_MST_SCK" to "CLK_DIV_SCK_BCK" and "CLK_DIV_MST_BCK" to "CLK_DIV_BCK_LRCK"
in Table 7.............................................................................................................................................................................. 38
•
Changed Figure 34; clock tree updated and corrected ........................................................................................................ 38
•
Added "Target Clock Rates for ADC, DSP#1 and DSP#2" section ..................................................................................... 39
•
Changed Table 9; corrected PLL values by increasing P and R by 1, and corrected DSP1 clock divider values .............. 40
•
Changed Table 10; corrected PLL values by increasing P and R by 1, and corrected DSP1 clock divider values ............ 41
•
Changed Table 12; corrected PLL values by increasing P and R by 1, and corrected typo in DSP2 column title.............. 43
•
Changed Table 13; corrected PLL values by increasing P and R by 1, and corrected typo in DSP2 column title.............. 44
•
Added text "The clock tree must also be set..." to Software-Controlled Devices ADC Non-Audio MCK PLL Mode
section .................................................................................................................................................................................. 45
•
Changed PLL condition for D = 0000 to show 1 MHz ≤ (PLLCKIN / P) ≤ 20 MHz and 1 ≤ J ≤ 63 ...................................... 45
•
Changed PLL condition for D ≠ 0000 to show 6.667 MHz ≤ (PLLCLKIN / P) ≤ 20 MHz and 4 ≤ J ≤ 11 ............................. 45
•
Changed register numbers in Software-Controlled Devices Manual PLL Calculation section to align with the register
numbers in Table 14............................................................................................................................................................. 46
•
Changed Clock Halt and Error section; clock error moved to Clocks section, and interrupt capability deleted................... 46
•
Added Changing Clock Sources and Sample Rates section ............................................................................................... 47
•
Changed Secondary ADC: Energysense and Analog Control section; energysense signal detection not available in
active mode .......................................................................................................................................................................... 48
•
Changed text from "control signals up to 1.65 V" to "control signals up to 4.3 V" in the Secondary ADC Analog Input
Range section....................................................................................................................................................................... 49
•
Changed section title from "Secondary ADC DC Level Change Detection" to "Secondary ADC Controlsense DC
Level Change Detection" ...................................................................................................................................................... 49
•
Added text to the Secondary ADC Controlsense DC Level Change Detection section; controlsense is available in
both active and sleep modes................................................................................................................................................ 49
•
Added details to the Secondary ADC Controlsense DC Level Change Detection section regarding how to read
simple 8-bit values from the secondary ADC ....................................................................................................................... 49
•
Added new second paragraph to Energysense section ....................................................................................................... 50
•
Changed paragraph after Figure 38 in Energysense Signal Loss Flag section for clarity ................................................... 51
•
Changed Digital Decimation Filters section; clarified two different HPFs in the device ....................................................... 53
•
Changed text to clarify digital PGA update use in Digital PGA section................................................................................ 53
•
Changed Interrupt Controller section; deleted clock error as an interrupt source................................................................ 56
•
Changed text after Figure 44 in Interrupt Controller section; clarified INT pins all have same logic signal......................... 56
•
Added short description in the DIN Toggle Detection section.............................................................................................. 56
•
Added Clearing Interrupts section ........................................................................................................................................ 56
4
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Product Folder Links: PCM1860 PCM1861 PCM1862 PCM1863 PCM1864 PCM1865
PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
www.ti.com
SLAS831D – MARCH 2014 – REVISED MARCH 2018
Revision History (continued)
•
Changed Digital Audio Output 2 Configuration section; DOUT2 not available in TDM mode, only for 4-ch devices .......... 58
•
Added Time Division Multiplex (TDM Support) section ........................................................................................................ 58
•
Changed location of timing diagrams to Specifications section, and deleted Interface Timing section ............................... 59
•
Changed text in Bypassing the Internal LDO to Reduce Power Consumption section to clarify TDM mode with 1.8-V
IOVDD operation .................................................................................................................................................................. 61
•
Added text "The I2C control port.." to the I2C Interface section............................................................................................ 64
•
Changed pin numbers in Table 22 from "15, 16, 14" to "23, 24, 25" ................................................................................... 64
•
Added Real World Software Configuration using EnergySense and Controlsense section................................................. 65
•
Added more detail to Programming DSP Coefficients on Software-Controlled Devices section, and moved to new
location ................................................................................................................................................................................. 68
•
Added Dual PCM186x TDM Functionality section ............................................................................................................... 73
•
Added new paragraph to end of Analog Front-End Circuit For Single-Ended, Line-In Applications section ....................... 74
•
Changed 1.8-V Support section; clarified that both IOVDD and LDO must be driven with 1.8 V in 1.8-V mode ................ 79
•
Added Brownout Conditions section..................................................................................................................................... 79
•
Added test condition to step 3 in Power Up Sequence section; (PLL requires < 250 µs) ................................................... 80
•
Changed Layout section for clarity ...................................................................................................................................... 84
•
Deleted old Figure 67, PCM1865 EVM Signal Partitioning; redundant, and same information shown in Figure 74 .......... 84
•
Added Figure 75 ................................................................................................................................................................... 85
•
Changed "0xFF" to "0xFE" in last sentence of Register Map Description section............................................................... 85
•
Changed values for register 3, bits 6-0; changed from "RSV" to correct bit names ........................................................... 86
•
Changed bits 4 and 3 from 1 and 0 to RSV, respectively, in register 27 ............................................................................. 86
•
Changed register 44 (0x2C) from reserved ("RSV") to actual bit names ............................................................................. 87
•
Changed registers 52 and 53 to registers 51 and 52, respectively...................................................................................... 87
•
Changed TX_WLEN bit option 00 description from "Reserved" to "32-bit" in Page 0, register 11 ...................................... 95
•
Changed GPIO0_FUNC for 001 from "SPI MISO (Out:Default)" to "Digital MIC Input 0 (In)" and for 010 from
"RESERVED" to "SPI MISO (Out)" in register 16 ................................................................................................................ 98
•
Changed "DPGA" to "APGA" in description column for bits 3, 2, 1, and 0 in register 25 .................................................. 104
•
Changed DIV_NUM default value in page 0, register 33 from "000 0001" to "000 0000" ................................................. 106
•
Changed names and descriptions of master mode clock dividers in registers 37, 38, and 39 for clarity .......................... 108
•
Changed "Divider" to "Multiplier" in R[3:0] description for register 42................................................................................ 110
•
Changed values for R[3:0] from 1, 1/2, 1/3, 1/4, and 1/16 to 1, 2, 3, 4, and 16, respectively .......................................... 110
•
Changed "Divider" to "Multiplier" in J[5:0] description for register 43 ................................................................................ 111
•
Changed "Divider" to "Multiplier" in D_LSB[7:0] description for register 44 ....................................................................... 111
•
Changed "Divider" to "Multiplier" in D_MSB[5:0] description for register 45 ...................................................................... 111
•
Changed register 52 to register 51..................................................................................................................................... 114
•
Changed register 53 to register 52..................................................................................................................................... 115
•
Changed bit 3 from CLKERR to RSV in register 96........................................................................................................... 123
•
Deleted bit 3 from CLKERR to RSV in register 97 ............................................................................................................. 124
•
Changed default values in page 1: register 1 for bits 4, 2, 1, and 0 from "1" to "0", and updated descriptions for clarity. 129
Changes from Revision B (March 2014) to Revision C
Page
•
Changed "terminal" to "pin" throughout data sheet ................................................................................................................ 1
•
Added table note about orderable addendum ........................................................................................................................ 1
•
Deleted package designators from part numbers in Device Information table....................................................................... 1
•
Changed "THD+N at - 1dBFS" to "Differential Input THD+N at - 1dBFS" ............................................................................. 1
Copyright © 2014–2018, Texas Instruments Incorporated
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•
Corrected pin numbers in Pin Description table ..................................................................................................................... 9
•
Corrected pin numbers in Pin Description table - pin 11 is LDO and pin 12 is DGND ........................................................ 11
•
Changed Energysense Accuracy typ from 1dB to 3dB ........................................................................................................ 13
•
Changed Secondary ADC Accuracy from 10 bits to 12 bits ............................................................................................... 13
•
Added Parameter Measurement Information section .......................................................................................................... 23
•
Added default values for reserved registers......................................................................................................................... 85
Changes from Revision A (March 2014) to Revision B
Page
•
Added PCM1861 example system diagram ........................................................................................................................... 1
•
Changed typical performance table........................................................................................................................................ 1
•
Updated Page 3 and Page 253 registers ............................................................................................................................ 85
Changes from Original (March 2014) to Revision A
•
6
Page
Changed from Advance Information to Production Data status ............................................................................................. 1
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PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
www.ti.com
SLAS831D – MARCH 2014 – REVISED MARCH 2018
5 Device Comparison Table
PART NUMBER
PCM1860
Control method
PCM1861
PCM1862
PCM1863
Differential
SNR performance A weighted
data
PCM1864
PCM1865
103 dB
110 dB
I2C or SPI
H/W
103 dB
110 dB
103 dB
110 dB
Analog front end
2.1 VRMS MUX with fixed PGA gains
Simultaneous channel
capability
2.1 VRMS MUX, MIX, PGA and auxiliary ADC
2
Energysense signal detect
Yes (fixed threshold)
Yes (programmable threshold)
Energysense signal loss
No
Yes (programmable threshold)
Controlsense
No
Yes (programmable threshold)
2
4
Interrupt controller
No
Digital microphone support
No
Yes
Clock PLL
BCK to generate internal master clock
Fully programmable
Lowest power standby mode
(1.8-V IOVDD)
7.96 mW
0.22 mW
Digital mixing with digital and
analog inputs
No
Yes (2)
Yes (4)
Yes
2
Digital output formats
Left-justified, I S
Left-justified, right-justified, I2S, TDM
Interrupt capabilities
Energysense signal detect
Energysense signal loss and detect, controlsense, post PGA clipping, RX digital
toggle
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PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
SLAS831D – MARCH 2014 – REVISED MARCH 2018
www.ti.com
6 Pin Configuration and Functions
DBT Package: PCM1860 and PCM1861
30-Pin TSSOP
Top View
VINL2/VIN1M
1
30
VINR3/VIN3P
VINR2/VIN2M
2
29
VINL3/VIN4P
VINL1/VIN1P
3
28
VINR4/VIN3M
VINR1/VIN2P
4
27
VINL4/VIN4M
Mic Bias
5
26
MD0
VREF
6
25
MD1
AGND
7
24
MD3
AVDD
8
23
MD2
XO
9
22
MD4
XI
10
21
MD5
LDO
11
20
MD6
DGND
12
19
INT
DVDD
13
18
DOUT
IOVDD
14
17
BCK
SCKI
15
16
LRCK
Not to scale
8
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
Pin Functions: PCM1860 and PCM1861
PIN
NO.
TYPE
NAME
DESCRIPTION
1
VINL2/VIN1M
Analog input
Analog input 2, L-channel (or differential M input for input 1)
2
VINR2/VIN2M
Analog input
Analog input 2, R-channel (or differential M input for input 2)
3
VINL1/VIN1P
Analog input
Analog input 1, L-channel (or differential P input for input 1)
4
VINR1/VIN2P
Analog input
Analog input 1, R-channel (or differential P input for input 2)
5
Mic Bias
Power
Microphone bias output
Power
Reference voltage output decoupling point (typically, 0.5 AVDD). Connect 1-µF capacitor
from this pin to AGND.
Power
Analog ground
Power
Analog power supply (typically, 3.3 V). Connect 0.1-µF and 10-µF capacitors from this pin
to AGND.
6
VREF
7
AGND
8
AVDD
9
XO
Digital output
10
XI
Digital input
11
LDO
12
DGND
Crystal oscillator output
Crystal oscillator input or master clock input (1.8-V CMOS signal)
Power
Internal low-dropout regulator (LDO) decoupling output, or external 1.8-V input to bypass
LDO. Connect 0.1-µF and 10-µF capacitors from this pin to DGND.
Power
Digital ground
Power
Digital power supply (typically, 3.3 V). Connect 0.1-µF and 10-µF capacitors from this pin to
DGND.
Power supply for I/O voltages (typically, 3.3 V or 1.8 V).
13
DVDD
14
IOVDD
Power
15
SCKI
Digital input
CMOS level (3.3 V) master clock input
16
LRCK
Digital
input/output
Audio data word clock (left right clock) input/output (1)
17
BCK
Digital
input/output
Audio data bit clock input/output (1)
18
DOUT
Digital output
Audio data digital output
19
INT
Analog output
Interrupt output (for analog input detection). Pull high for active mode, pull low for idle.
Analog input
Analog MUX and gain selection using MD6, MD5, and MD2 pins, respectively:
000: SE Ch 1 (VINL1 and VINR1)
001: SE Ch 2 (VINL2 and VINR2)
010: SE Ch 3 (VINL3 and VINR3)
011: SE Ch 4 (VINL4 and VINR4)
100: SE Ch 4 with 12-dB gain
101: SE Ch 4 with 32-dB gain
110: Diff Ch 1 (VIN1P and VIN1M, VIN2P and VIN2M)
111: Diff Ch 2 (VIN3P and VIN3M, VIN4P and VIN4M) with 12-dB gain
20
MD6
21
MD5
Analog input
Analog MUX and gain selection (see MD6 pin for description)
22
MD4
Analog input
Audio format: high = left-justified, low = I2S
23
MD2
Analog input
Analog MUX and gain selection (see MD6 pin for description)
24
MD3
Digital Input
Filter select: 0 = FIR decimation filter, 1 = IIR low latency decimation filter
Analog input
Audio interface mode selection using MD1 and MD0 pins, respectively:
00: Slave mode, 256 × fS, 384 × fS, 512 × fS autodetect
01: Master mode (512 × fS)
10: Master mode (384 × fS)
11: Master mode (256 × fS)
25
MD1
26
MD0
Analog input
Audio interface mode selection (see MD1 pin for description)
27
VINL4/VIN4M
Analog input
Analog input 4, L-channel (or differential M input for input 4)
28
VINR4/VIN3M
Analog input
Analog input 4, R-channel (or differential M input for input 3)
29
VINL3/VIN4P
Analog input
Analog input 3, L-channel (or differential P input for input 4)
30
VINR3/VIN3P
Analog input
Analog input 3, R-channel (or differential P input for input 3)
(1)
Schmitt trigger input with internal pull-down (50 kΩ, typically).
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DBT Package: PCM1862, PCM1863, PCM1864, and PCM1865
30-Pin TSSOP
Top View
VINL2/VIN1M
1
30
VINR3/VIN3P
VINR2/VIN2M
2
29
VINL3/VIN4P
VINL1/VIN1P
3
28
VINR4/VIN3M
VINR1/VIN2P
4
27
VINL4/VIN4M
Mic Bias
5
26
MD0
VREF
6
25
MS/AD
AGND
7
24
MC/SCL
AVDD
8
23
MOSI/SDA
XO
9
22
MISO/GPIO0/DMIN2
XI
10
21
GPIO1/INTA/DMIN
LDO
11
20
GPIO2/INTB/DMCLK
DGND
12
19
GPIO3/INTC
DVDD
13
18
DOUT
IOVDD
14
17
BCK
SCKI
15
16
LRCK
Not to scale
NOTE: The DMIN2 option for pin 22 is only available on the PCM1864 and PCM1865 devices.
10
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
Pin Functions: PCM1862, PCM1863, PCM1864, and PCM1865
PIN
NO.
TYPE
NAME
DESCRIPTION
1
VINL2/VIN1M
Analog input
Analog input 2, L-channel (or differential M input for input 1)
2
VINR2/VIN2M
Analog input
Analog input 2, R-channel (or differential M input for input 2)
3
VINL1/VIN1P
Analog input
Analog input 1, L-channel (or differential P input for input 1)
4
VINR1/VIN2P
Analog input
Analog input 1, R-channel (or differential P input for input 2)
5
Mic Bias
Power
Microphone bias output
Power
Reference voltage output decoupling point (typically, 0.5 AVDD). Connect 1-µF
capacitor from this pin to AGND.
Power
Analog ground
Power
Analog power supply (typically, 3.3 V). Connect 0.1-µF and 10-µF capacitors from
this pin to AGND.
6
7
8
VREF
AGND
AVDD
9
XO
Digital output
10
XI
Digital input
11
12
13
LDO
DGND
DVDD
Internal LDO decoupling output, or external 1.8-V input to bypass LDO. Connect
0.1-µF and 10-µF capacitors from this pin to DGND.
Power
Digital ground
Power
Digital power supply (typically, 3.3 V). Connect 0.1-µF and 10-µF capacitors from
this pin to DGND.
Power supply for I/O voltages (typically, 3.3 V or 1.8 V).
IOVDD
Power
15
SCKI
Digital input
16
LRCK
17
BCK
Digital input/output Audio data bit clock input/output (1)
DOUT
19
GPIO3/INTC
20
GPIO2/INTB/DMCLK
21
GPIO1/INTA/DMIN
24
CMOS level (3.3 V) master clock input
Digital input/output Audio data world clock (left right clock) input/output (1)
18
23
Crystal oscillator input or master clock input (1.8-V CMOS signal)
Power
14
22
Crystal oscillator output
Analog output
MISO/GPIO0/DMIN2
MOSI/SDA
Audio data digital output
Digital input/output GPIO 3 or interrupt C
Digital input/output GPIO 2, interrupt B, or digital microphone clock output
Digital input/output GPIO 1, interrupt A, or digital microphone input
Digital input/output In SPI mode: master in, slave out
In I2C mode: GPIO0 (or DMIN2 for PCM1864 and PCM1865 only)
Digital input/output In SPI mode: master out, slave in
In I2C mode: SDA
Digital input
In SPI mode: serial bit clock
In I2C mode: serial bit clock
Digital input
In SPI mode: chip select
In I2C mode: address pin
MD0
Digital input
Control method select pin: I2C (tied low or not connected) or SPI (tied high)
27
VINL4/VIN4M
Analog input
Analog input 4, L-channel (or differential M input for input 4)
28
VINR4/VIN3M
Analog input
Analog input 4, R-channel (or differential M input for input 3)
29
VINL3/VIN4P
Analog input
Analog input 3, L-channel (or differential P input for input 4)
30
VINR3/VIN3P
Analog input
Analog input 3, R-channel (or differential P input for input 3)
25
26
(1)
MC/SCL
MS/AD
Schmitt trigger input with internal pull-down (50 kΩ, typically).
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7 Specifications
7.1 Absolute Maximum Ratings
over operating temperature (unless otherwise noted) (1)
Supply voltage
Ground voltage differences
Digital input voltage
Analog input voltage
Temperature
(1)
MIN
MAX
AVDD to AGND
–0.3
3.9
UNIT
DVDD to DGND
–0.3
3.9
IOVDD to DGND
–0.3
3.9
AGND to DGND
–0.3
0.3
Digital input to DGND
–0.3
IOVDD + 0.3
XI to DGND
–0.3
2.1
VINxx to AGND
–1.7
5.0
Operating ambient, TA
–40
125
Junction, TJ
–40
150
Storage, Tstg
–40
150
V
V
V
V
°C
Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings
only and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating
conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
7.2 ESD Ratings
VALUE
V(ESD)
(1)
(2)
Electrostatic discharge
Human-body model (HBM), per ANSI/ESDA/JEDEC JS-001 (1)
±2000
Charged-device model (CDM), per JEDEC specification JESD22C101 (2)
±750
UNIT
V
JEDEC document JEP155 states that 500-V HBM allows safe manufacturing with a standard ESD control process.
JEDEC document JEP157 states that 250-V CDM allows safe manufacturing with a standard ESD control process.
7.3 Recommended Operating Conditions
MIN
NOM
MAX
UNIT
3.0
3.3
3.6
V
POWER
AVDD
Analog supply voltage to AGND
DVDD
Digital supply voltage to DGND
3.0
3.3
3.6
V
at 1.8 V
1.62
1.8
1.98
V
at 3.3 V
3.0
3.3
3.6
V
IOVDD – 0.3
IOVDD
IOVDD + 0.3
V
125
°C
IOVDD
IO supply voltage to DGND
LDO
LDO pin voltage to DGND
(LDO is an input when using external 1.8-V power supply)
TEMPERATURE
TA
Operating ambient temperature
–40
7.4 Thermal Information
PCM186x
THERMAL METRIC (1)
DBT (TSSOP)
UNIT
30 PINS
RθJA
Junction-to-ambient thermal resistance
79.6
°C/W
RθJC(top)
Junction-to-case (top) thermal resistance
15.1
°C/W
RθJB
Junction-to-board thermal resistance
33.1
°C/W
ψJT
Junction-to-top characterization parameter
0.4
°C/W
ψJB
Junction-to-board characterization parameter
32.6
°C/W
(1)
12
For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application
report.
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
7.5 Electrical Characteristics: PGA and ADC AC Performance
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, and 24-bit data (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
PCM1860
PCM1862
PCM1864
97
103
dB
PCM1861
PCM1863
PCM1865
97
110
dB
32-dB PGA gain (1), –86-dB input signal, master mode at
Diff input
85
90
dB
0-dB PGA gain, –1-dB input signal, master mode at Diff
input
–85
–93
dB
32-dB PGA gain, –33-dB input signal, master mode at
Diff input
–76
–84
dB
PRIMARY PGA AND ADC
Input channel signal-to-noise ratio,
differential input
Input channel THD+N, differential
input
0-dB PGA gain, –60-dB input signal,
master mode at Diff input
L channel to R channel separation line
input
0-dB PGA gain, –1-dB input signal, master mode
–105
dB
L channel to R channel separation mic
input
20-dB PGA gain, –1-dB input signal, master mode
–105
dB
L1 channel to L2 channel separation
line input
0-dB PGA gain, –1-dB input signal, master mode
–105
dB
R1 channel to R2 channel separation
line input
0-dB PGA gain, –1-dB input signal, master mode
–105
dB
L1 channel to L2 channel separation
mic input
20-dB PGA gain, –1-dB input signal, master mode
–105
dB
R1 channel to R2 channel separation
mic input
20-dB PGA gain, –1-dB input signal, master mode
–105
dB
Range of analog PGA
–12 to +12 dB (1-dB step), 20 dB, and 32 dB
–12 (2)
32
Accuracy of PGA + ADC
Matching between PGA + ADCs onchip
Full-scale voltage input
Input channel signal-to-noise ratio,
single-ended input
Input channel THD+N, single-ended
input
Input impedance per analog input pin
CMRR
Common-mode rejection ratio
dB
0.5
dB
0.05
dB
Single-ended mode
2.1
VRMS
Differential mode (2.1 VRMS per pin)
4.2
VRMS
PCM1860
PCM1862
PCM1864
103
dB
PCM1861
PCM1863
PCM1865
106
dB
32-dB PGA gain, –92-dB input signal, master mode at
SE input
75
dB
0-dB PGA gain, –1-dB input signal, master mode at SE
input
87
dB
32-dB PGA gain, –33-dB input signal, master mode at
SE input
68
dB
PCM1864 and PCM1865
10
PCM1860, PCM1861, PCM1862, and PCM1863
20
Differential input, 1-kHz signal on both pins and measure
level at output
56
dB
–57
dBFS
10
kHz
0-dB PGA gain, –60-dB input signal,
master mode at SE input
kΩ
SECONDARY ADC PERFORMANCE
Default Energysense signal detection
threshold
At 1 kHz
Energysense signal bandwidth
Energysense accuracy (2)
3
dB
Secondary ADC accuracy
12
bits
Secondary ADC sampling rate
(1)
(2)
8
192
kHz
32-dB gain when using differential mode inputs is only available in SW-controlled devices.
Specified by design.
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7.6 Electrical Characteristics: DC
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, slave mode, single-speed mode, fS = 48 kHz,
system clock = 512 × fS, and 24-bit data (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
POWER
AVDD current
DVDD current
2-channel device, AVDD = DVDD = IOVDD = 3.3 V,
active mode
IOVDD current
mA
mA
80
mW
AVDD current
2.8
mA
DVDD current
0.353
mA
2-channel device, AVDD = DVDD = IOVDD = 3.3 V,
sleep mode
IOVDD current
2.2
mA
17.6
mW
AVDD current
0.06
mA
DVDD current
0.015
mA
Total power
2-channel device, AVDD = DVDD = IOVDD = 3.3 V,
standby mode for software device
IOVDD current
0.12
mA
0.64
mW
AVDD current
1.3
mA
DVDD current
0.353
mA
Total power
2-channel device, AVDD = DVDD = IOVDD = 3.3 V,
standby mode for hardware device
IOVDD current
Total power
AVDD current
DVDD current
IOVDD and LDO Current
2-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V, active mode
Total power
AVDD current
DVDD current
IOVDD and LDO Current
2-channel device, AVDD = DVDD = 3.3 V
IOVDD = LDO = 1.8 V, sleep mode
Total power
AVDD current
2-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V,
standby mode for software device
DVDD current
Total power (1)
AVDD current
DVDD current
IOVDD and LDO Current
2-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V,
standby mode for hardware device
1.6
mA
10.725
mW
18
mA
0.015
mA
5.4
mA
69.2
mW
2.8
mA
0.353
mA
2
mA
13.995
mW
0.06
mA
0.007
mA
0.221
mW
1.3
mA
0.35
mA
1.4
mA
7.965
mW
AVDD current
31
mA
DVDD current
0.01
mA
10
mA
135.3
mW
2.8
mA
0.35
mA
Total power
4-channel device, AVDD = DVDD = IOVDD = 3.3 V,
active mode
IOVDD current
Total power
AVDD current
DVDD current
4-channel device, AVDD = DVDD = IOVDD = 3.3 V,
sleep mode
IOVDD current
Total power
AVDD current
DVDD current
4-channel device, AVDD = DVDD = IOVDD = 3.3 V,
standby mode for software device
IOVDD current
2.2
mA
17.655
mW
0.06
mA
0.015
mA
0.12
mA
0.644
mW
AVDD current
1.3
mA
DVDD current
0.35
mA
Total power
4-channel device, AVDD = DVDD = IOVDD = 3.3 V,
standby mode for hardware device
IOVDD current
Total power
14
mA
6.2
Total Power
(1)
18
0.01
0.16
mA
10.725
mW
IOVDD and LDO current consumption is negligible for software-controlled devices in standby mode.
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
Electrical Characteristics: DC (continued)
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, slave mode, single-speed mode, fS = 48 kHz,
system clock = 512 × fS, and 24-bit data (unless otherwise noted)
PARAMETER
TEST CONDITIONS
AVDD current
DVDD current
IOVDD and LDO Current
4-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V, active mode
TYP
MAX
UNIT
31
mA
0.01
mA
8.3
mA
117.3
mW
AVDD current
2.8
mA
DVDD current
0.35
mA
Total power
IOVDD and LDO Current
4-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V, sleep mode
Total power
AVDD current
4-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V,
standby mode for software device
DVDD current
Total power (1)
AVDD current
DVDD current
IOVDD and LDO Current
4-channel device, AVDD = DVDD = 3.3 V,
IOVDD = LDO = 1.8 V,
standby mode for hardware device
2
mA
13.995
mW
0.06
mA
0.007
mA
0.221
mW
1.3
mA
0.35
mA
1.4
mA
7.965
mW
on IOVDD when XTAL is used
0.5
mA
on DVDD in BCK PLL mode
1.5
mA
on IOVDD when master mode is enabled
2
mA
IOVDD = 3.3 V or IOVDD = LDO = 1.8 V, fS = 192
kHz, 2-channel active mode
4
mA
IOVDD = 3.3 V or IOVDD = LDO = 1.8 V, fS = 192
kHz, 4-channel active mode
7.5
mA
80
dB
Mic bias noise
5
µVRMS
Mic bias current drive
4
mA
Total power
Additional current consumption
PSRR
MIN
Power-supply rejection ratio
MIC BIAS
Mic bias voltage
2.6
V
%IOVDD
DIGITAL I/O
VOH
Output logic high voltage level
IOH = 2 mA
75
VOL
Output logic low voltage level
IOL = –2 mA
25
|IIH|1
Input logic high current level
All digital pins
10
µA
|IIL|1
Input logic low current level
All digital pins
–10
µA
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7.7 Electrical Characteristics: Digital Filter
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, and 24-bit data (unless otherwise noted)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
CLASSIC FIR
Pass band
0.454
Stop band
0.583
fS
Pass-band ripple
±0.05
dB
Stop-band attenuation
–65
dB
Group delay or latency
30
Samples
1
Hz
Pass band
0.454
fS
Stop band
0.546
fS
Pass-band ripple
±0.02
dB
HPF –3-dB cutoff frequency
fS
LOW LATENCY IIR
Stop-band attenuation
–75
dB
Group delay or latency
10
Samples
1
Hz
HPF –3-dB cutoff frequency
7.8 Timing Requirements: External Clock
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, 24-bit data (unless otherwise noted)
MIN
XTAL support
TYP
UNIT
35
MHz
MCLK frequency
3.3 V on MCLK pin
1
50
MHz
MCLK
1.8 V MCLK input on XI pin
1
50
MHz
MCLK input duty cycle
1.8 V MCLK
48%
52%
Maximum BCK frequency
16
MAX
15
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IOVDD = 3.3 V
50
MHz
IOVDD = 1.8 V
25
MHz
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
7.9 Timing Requirements: I2C Control Interface
CONDITIONS
fSCL
SCL clock frequency
tBUF
Bus free time between a STOP and START condition
tLOW
Low period of the SCL clock
tHI
High period of the SCL clock
tRS-SU
Setup time for repeated START condition
tS-HD
Hold time for START condition
tRS-HD
Hold time for repeated START condition
tD-SU
Data setup time
tD-HD
Data hold time
tSCL-R
Rise time of SCL signal
tSCL-R1
Rise time of SCL signal after a repeated START
condition and after an acknowledge bit
tSCL-F
Fall time of SCL signal
tSDA-R
Rise time of SDA signal
tSDA-F
Fall time of SDA signal
tP-SU
Setup time for STOP condition
CB
Capacitive load for SDA and SCL line
tSP
Pulse duration of spike suppressed
VNH
Noise margin at high level for each connected device
(including hysteresis)
MIN
UNIT
100
kHz
Fast
400
kHz
Standard
4.7
Fast
1.3
Standard
4.7
Fast
1.3
µs
µs
Standard
4.0
Fast
600
µs
ns
Standard
4.7
µs
Fast
600
ns
Standard
4.0
µs
Fast
600
ns
Standard
4.0
µs
Fast
600
ns
Standard
250
Fast
100
ns
Standard
0
900
Fast
0
900
Standard
20 + 0.1CB
1000
Fast
20 + 0.1CB
300
Standard
20 + 0.1CB
1000
Fast
20 + 0.1CB
300
Standard
20 + 0.1CB
1000
Fast
20 + 0.1CB
300
Standard
20 + 0.1CB
1000
Fast
20 + 0.1CB
300
Standard
20 + 0.1CB
1000
Fast
20 + 0.1CB
300
Standard
4.0
Fast
600
ns
ns
ns
ns
ns
ns
400
pF
50
ns
0.2VDD
V
Repeated
START
STOP
tD-HD
tD-SU
ns
µs
Fast
START
tBUF
MAX
Standard
tSDA-R
tP-SU
tSDA-F
SDA
tLOW
tSCL-R
tRS-HD
tSP
SCL
tS-HD
tSCL-F
tHI
tRS-SU
Figure 1. I2C Control Interface Timing
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7.10 Timing Requirements: SPI Control Interface
MIN
tMCY
MC pulse period
tMCL
MAX
UNIT
100
ns
Pulse duration, MC low
40
ns
tMCH
Pulse duration, MC high
40
ns
tMHH
Pulse duration, MS high
20
ns
tMSS
MS falling edge to MC rising edge
30
ns
tMSH
MS hold time (1)
30
ns
tMDH
MOSI hold time
15
ns
tMDS
MOSI setup time
15
tMOS
MC rising edge to MDO stable
(1)
ns
20
ns
MC falling edge for LSB to MS rising edge.
MS
tMCH
tMSS
tMCL
tMSH
tMHH
MC
tMCY
MSB IN
BIT 15
BIT 14 - 2
BIT 1
LSB
MOSI
tMDS
tMDH
HI-Z
MISO
BIT 1
LSB
HI-Z
Figure 2. SPI Control Interface Timing
18
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7.11 Timing Requirements: Audio Data Interface for Slave Mode
PARAMETER (1)
tBCKP
BCK period
tBCKH
MIN
TYP
MAX
UNIT
1 / (64 × fS)
ns
BCK pulse duration high
1.5 × tSCKI
ns
tBCKL
BCK pulse duration low
1.5 × tSCKI
ns
tLRSU
LRCK set up time to BCK rising edge
50
ns
tLRHD
LRCK hold time to BCK rising edge
10
ns
tLRCP
LRCK period
10
µs
tCKDO
Delay time BCK falling edge to DOUT valid
–10
40
ns
tLRDO
Delay time LRCK edge to DOUT valid
–10
40
ns
tR
Rise time of all signals
20
ns
tF
Fall time of all signals
20
ns
(1)
Timing measurement reference level is 1.4 V for input and 0.5VDD for output. Rise and fall times are measured from 10% to 90% of the
IN/OUT signals swing. Load capacitance of DOUT is 20 pF. tSCKI means SCKI period.
tLRCP
1.4 V
LRCK
tBCKH
tBCKL
tLRHD
tLRSU
BCK
1.4 V
tBCKP
tCKDO
tLRDO
0.5 VDD
DOUT
Figure 3. Audio Data Interface Timing, Slave Mode: LRCK and BCK as Inputs
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7.12 Timing Requirements: Audio Data Interface for Master Mode
PARAMETER (1)
tBCKP
BCK period
tBCKH
BCK pulse duration high
tBCKL
BCK pulse duration low
tCKLR
Delay time BCK falling edge to LRCK valid
tLRCP
LRCK period
tCKDO
Delay time BCK falling edge to DOUT valid
tLRDO
Delay time LRCK edge to DOUT valid
tR
Rise time of all signals
tF
Fall time of all signals
tSCKBCK
Delay time SCKI rising edge to BCK edge (2)
(1)
(2)
MIN
TYP
MAX
UNIT
150
1 / (64 ×
fS)
2000
ns
65
1000
ns
65
1000
ns
–10
20
ns
125
µs
–10
20
ns
–10
20
ns
20
ns
20
ns
30
ns
10
1/fS
5
Timing measurement reference level is 0.5 VDD. Rise and fall times are measured from 10% to 90% of the IN/OUT signals swing. Load
capacitance of all signals are 20 pF.
Timing measurement reference level is 1.4 V for input and 0.5 VDD for output. Load capacitance of BCK is 20 pF. This timing is applied
when SCKI frequency is less than 25 MHz.
tLRCP
LRCK
0.5 VDD
tBCKH
tBCKL
tCKLR
BCK
0.5 VDD
tBCKP
tCKDO
tLRDO
DOUT
0.5 VDD
Figure 4. Audio Data Interface Timing, Master Mode: LRCK and BCK as Outputs
1.4 V
SCKI
tSCKBCK
tSCKBCK
0.5 VDD
BCK
Figure 5. Audio Data Interface Timing, Master Mode: BCK as Outputs
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7.13 Typical Characteristics
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, and 24-bit data (unless otherwise noted)
0
Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (dB)
0
-20
-40
-60
-80
-100
-90
-80
-70
-60
-50
-40
-30
Input Level (dBFS)
-20
-10
-20
-40
-60
-80
-100
-90
0
PCM1861, PCM1863, and PCM1865
-60
-50
-40
-30
Input Level (dBFS)
-20
-10
0
D002
Figure 7. THD+N vs Input Level
-60
-60
-70
-70
-80
-80
-90
-90
Amplitude (dB)
Amplitude (dB)
-70
PCM1860, PCM1862, and PCM1864
Figure 6. THD+N vs Input Level
-100
-110
-120
-100
-110
-120
-130
-130
-140
-140
-150
-150
-160
-160
0
4
8
12
Frequency (kHz)
16
20
0
4
D003
PCM1861, PCM1863, and PCM1865
Input = –60 dBFS at 1 kHz
8
12
Frequency (kHz)
16
20
D004
PCM1860, PCM1862, and PCM1864
Input = –60 dBFS at 1 kHz
Figure 8. Main ADC Output FFT
Figure 9. Main ADC Output FFT
0
0
-20
-20
-40
-40
Amplitude (dB)
Amplitude (dB)
-80
D001
-60
-80
-100
-60
-80
-100
-120
-120
-140
-140
-160
-160
0
4
8
12
Frequency (kHz)
16
PCM1861, PCM1863, and PCM1865
Input = –1 dBFS at 1 kHz
Figure 10. Main ADC Output FFT
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20
D005
0
4
8
12
Frequency (kHz)
16
20
D006
PCM1860, PCM1862, and PCM1864
Input = –1 dBFS at 1 kHz
Figure 11. Main ADC Output FFT
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Typical Characteristics (continued)
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, and 24-bit data (unless otherwise noted)
-108.75
-102.6
-109
-102.7
-102.8
Dynamic Range (dB)
Dynamic Range (dB)
-109.25
-109.5
-109.75
-110
-110.25
-102.9
-103
-103.1
-103.2
-103.3
-103.4
-110.5
-103.5
-110.75
-103.6
3
3.1
3.2
3.3
3.4
Supply Voltage (V)
3.5
3.6
3
PCM1861, PCM1863, and PCM1865
3.2
3.3
3.4
Supply Voltage (V)
3.5
3.6
D008
PCM1860, PCM1862, and PCM1864
Figure 12. Dynamic Range vs Supply Voltage
Figure 13. Dynamic Range vs Supply Voltage
-94.1
-91.5
Total Harmonic Distortion + Noise (dB)
Total Harmonic Distortion + Noise (dB)
3.1
D007
-94.2
-94.3
-94.4
-94.5
-94.6
-94.7
-94.8
-94.9
-95
-95.1
-91.55
-91.6
-91.65
-91.7
-91.75
-91.8
-91.85
-91.9
3
3.1
3.2
3.3
3.4
Supply Voltage (V)
3.5
3.6
3
D009
PCM1861, PCM1863, and PCM1865
3.1
3.2
3.3
3.4
Supply Voltage (V)
3.5
3.6
D010
PCM1860, PCM1862, and PCM1864
Figure 14. THD+N vs Supply Voltage
Figure 15. THD+N vs Supply Voltage
0
250
-10
Amplitude (dB)
Power Consumption (mW)
-5
200
150
100
-20
-25
50
-30
4ch
2ch
0
48
96
144
Sample Rate (kHz)
192
At fS = 48 kHz, 96 kHz, and 192 kHz
Figure 16. Power Consumption vs Sample Rate
22
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D011
-35
20
200
2k
Frequency (Hz)
20k
D012
fS = 48 kHz
Figure 17. Secondary ADC Frequency Response
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
Typical Characteristics (continued)
0
0
-20
-20
-40
-40
Amplitude (dB)
Amplitude (dB)
all specifications at TA = 25°C, AVDD = 3.3 V, DVDD = 3.3 V, IOVDD = 3.3 V, master mode, single-speed mode, fS = 48 kHz,
system clock = 256 × fS, and 24-bit data (unless otherwise noted)
-60
-80
-100
-60
-80
-100
-120
-120
-140
-140
-160
-160
0
4
8
12
Frequency (kHz)
16
20
0
fS = 48 kHz
30
40
Frequency (kHz)
50
60
D014
Figure 19. High Bandwidth FFT of THD Components
0
-10
Output Amplitude (dB)
Output Amplitude (dB)
20
fS = 192 kHz, BW = 60 kHz, Input = –1 dBFS
Figure 18. Secondary ADC FFT
40
36
32
28
24
20
16
12
8
4
0
-4
-8
-12
-12 -8
10
D013
-20
-30
-40
-50
-60
-70
-80
-4
0
4
8 12 16 20 24 28 32 36 40
Input Amplitude (dB)
D015
Figure 20. PGA ADC Gain
-90
-90
-80
-70
-60
-50
-40
-30
Input Amplitude (dB)
-20
-10
0
D016
Figure 21. Linearity, Input vs Output
8 Parameter Measurement Information
All typical characteristics for the devices are measured using the respective PCM186x evaluation module (EVM)
and an Audio Precision SYS-2722 Audio Analyzer. A programmable serial interface adapter (PSIA) is used to
allow the I2S interface to be driven directly into the SYS-2722. The EVM schematic is shown in Figure 22.
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ANALOG
ANALOG
IN2L
INPUTS
1
J2
DNP
2
GND
IN2R
R4
3
100LS
VIN2
L
1
R
2
10uF/16V
GND
L
1
R
2
R40
R41
100K
0402
100K
0402
GND
GND
IN1L
1
2.20K
0603
IN1R
R8
2.20K
0603
2.20K
0603
R9
R10
R11
2.20K
0603
2.20K
0603
2.20K
0603
10uF/16V
C14
J5
0805 X7R
VINR4/VIN3M
1
R42
R43
100K
0402
100K
0402
Orange
GND
GND
Orange
2
2L
100LS
Orange
J9
2
GND
20pfd/50V
XI
C5
2
GND
1.0ufd/16V
+3.3V
+1.8V
C19
C40
0.1ufd/16V
0402 X7R
GND
+3.3V
R13
J8
6
U4
1
5
2
4
100LS
GND
VCCB
OE
B
R1
0.0
0603
GND
+3.3V
4.99K
0402
+3.3VA
0.1ufd/16V
0402 X7R
+1.8V
VCCA
GND
A
J10
2
TXB0101DBV
SOT23-DBV6
C9
10ufd/10V
0805 X7R
0.1ufd/16V
0402 X7R
GND
1
3
C8
GND
+1.8V
2
C10
100LS
+3.3VA
SCKI
Orange
1
GND
GND
1.0ufd/16V
0603 X7R
R2
GND
C11
0.1ufd/16V
0402 X7R
GND
SPDIF I2S
C12
10ufd/10V
0805 X7R
GND
XO-BUF
SCKI
LRCK
BCK
DIN
I2C BUS
C13
0.1ufd/16V
0402 X7R
GND
R47
10uF/16V
100K
0402
100K
0402
GND
GND
0805 X7R
+3.3VA
3
GND
1
L
2
R
VIN4
Case
GND
1
MD0
2
4 0603
1
30
2
29
3
28
3
1
5
MD0
6
25
MD1/AD
MD3/MC/SCL
8
23
DOUT2/MD2/MOSI/SDA
9
22
MD4/MISO/GPIO
10
21
MD5/GPIO1/INTA/DMIN
11
20
MD6/GPIO2/INTB/DMCLK
INT/GPIO3/INTC
17
15
16
3
1
+3.3VA
3
3
1
GND
MD5/GPIO1/INTA/DMIN
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
GND
2
4 0603
BCK
+3.3VA
GND
Orange
3
3
MD6/GPIO2/INTB/DMCLK
2
1
GND
INT/GPIO3/INTC
2
4 0603
R12
649
0603
R21 R22
1
4 0603
+3.3VA
TSSOP30-DBT
0.0
0603
2
+3.3VA
DOUT
Orange
0.0
0603
MD4/MISO/GPIO
4 0603
Orange
R20
1
J7
1
SDA-PCM
2
DIN
0.0
0603
SCL-PCM
GND
DOUT2/MD2/MOSI/SDA
GND
LRCK
R3
2
4 0603
Orange
PCM1860DBT
PCM1861DBT
PCM1862DBT
PCM1863DBT
PCM1864DBT
PCM1865DBT
MD3/MC/SCL
+3.3VA
24
18
1
4 0603
7
19
I2C
3
26
12
GPIO
2
+3.3VA
27
14
MD1/AD
GND
4
13
GND
4 0603
GND
0.0
0603
GND
VIN3
Case
+3.3VA
0603 X7R
GND
GND
100K
0402
R46
Orange
1
100LS
R45
100K
0402
C18
0603 COG
J11
R44
0805 X7R
Orange
XO
XI
GND
IN4R
4L
0603 COG
C7
R
4R
U1
C6
IN4L
2
Orange
100LS
XO
20pfd/50V
L
2
3L
1
2
VINL4/VIN4M
3R
1R
GND
1
100LS
C17
10uF/16V
J6
GND
2R
1
3
GND
VINR1/VIN2P
0805 X7R
Orange
1
0805 X7R
0.1ufd/50V
0603 X7R
Orange
Y0
INPUTS
C16
VINL3/VIN4P
Orange
1L
24.576MHz
HC-49USX
GND
IN3R
100LS
VINL1/VIN1P
C4
2
0805 X7R
10uF/16V
MICBIAS
C3
IN3L
C15
VINR3/VIN3P
VINR2/VIN2M
0805 X7R
3
100LS
1
3
0805 X7R
2
GND
R7
MICBIAS
10uF/16V
GND
R6
2.20K
0603
J3
10uF/16V
Case
R5
2.20K
0603
VINL2/VIN1M
C2
10uF/16V
Case
VIN1
C1
J4
LED
Green/2.1V
0603
0.0
0603
GND
SCKI
LRCK
DOUT
DOUT
BCK
DIN
SPDIF I2S
SDA-PCM
SCL-PCM
Copyright © 2016, Texas Instruments Incorporated
Figure 22. PCM186x Test Circuit
24
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9 Detailed Description
9.1 Overview
The PCM186x family of audio, analog-to-digital converters (ADCs) features a highly flexible, audio front end that
supports input levels from small millivolt microphone inputs to 2.1-VRMS line inputs. The analog front end can be
configured to support either differential or single-ended inputs, providing optimal performance when using
differential inputs. Mixing single-ended and differential inputs is possible. A digital microphone interface is
available in the software-controlled devices.
These devices support advanced clocking with the aid of an integrated oscillator circuit and an on-chip analog
phase-locked loop (PLL). The integrated oscillator circuit allows for the use of an external crystal or an external
master clock as the clock source in master mode. In addition, the PLL can be used to generate an on-chip
master clock that can be shared with the rest of the system, all from a bit clock input. This feature is useful in
systems where the audio source has no master clock to drive digital-to-analog converters (DACs) and amplifiers.
The on-chip clock monitoring system can also be monitored by the system microcontroller, in case clocks are lost
and the device enters sleep or standby state.
The secondary analog-to-digital converter (ADC) is a low-power, non-audio ADC that is used in sleep mode to
monitor the analog inputs. The secondary ADC is also used in controlsense mode to measure dc voltages in a
system, such as battery voltage and control potentiometers. In addition, controlsense features offer an option to
generate interrupts after detected voltages cross specific thresholds, allowing the microcontroller to be in a lowerpower sleep mode while the control voltages being measured are stable.
Control registers in this data sheet are shown as REGISTER_BIT_or_BYTE_NAME (page.x hex_address).
9.2 Functional Block Diagrams
The high level block diagrams, Figure 23 to Figure 25, show the differences between the PCM186x family. An
internal block diagram of the PCM186x family is shown in Figure 26.
PCM1860
PCM1861
VINL1/VIN1P
VINL2/VIN1M
MIX,
MUX
VINL3/VIN4P
Primary
ADC
PGA
VINL4/VIN4M
Secondary
ADC
Energysense
VINR1/VIN2P
VINR2/VIN2M
MIX,
MUX
VINR3/VIN3P
Audio
Serial
Port
(LJ, I2S)
BCK
LRCK
DOUT
Primary
ADC
PGA
VINR4/VIN3M
INT
VREF
MD6
Reference
Mic Bias
MD5
Control
and
Interrupt
Power
MD4
MD3
MD2
Clocks, PLL
MD1
SCKI
XI
XO
AVDD
AGND
DVDD
IOVDD
LDO
DGND
MD0
Copyright © 2017, Texas Instruments Incorporated
Figure 23. PCM1860 and PCM1861
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Functional Block Diagrams (continued)
PCM1862
PCM1863
VINL1/VIN1P
VINL2/VIN1M
MIX,
MUX
VINL3/VIN4P
Primary
ADC
PGA
VINL4/VIN4M
Secondary
ADC
VINR1/VIN2P
VINR2/VIN2M
MIX,
MUX
VINR3/VIN3P
Mixer and
Energysense
DSPs
Audio
Serial
Port
(LJ, I2S, TDM)
Primary
ADC
PGA
VINR4/VIN3M
BCK
LRCK
DOUT
DOUT2
DMIC/DIN
GPIO3/INTC
VREF
GPIO2/INTB/DMCLK
Reference
Mic Bias
GPIO1/INTA/DMIN
Control,
GPIO,
Interrupt,
Digital Mic Interface
Power
MISO/GPIO0
MOSI/SDA
MC/SCL
Clocks, PLL
MS/AD
SCKI
XI
XO
AVDD
AGND
DVDD
IOVDD
LDO
DGND
MD0
Copyright © 2017, Texas Instruments Incorporated
Figure 24. PCM1862 and PCM1863
PGA
Primary
ADC
(CH1L)
PGA
Primary
ADC
(CH2L)
VINL1/VIN1P
VINL2/VIN1M
MIX,
MUX
VINL3/VIN4P
VINL4/VIN4M
Secondary
ADC
VINR1/VIN2P
VINR2/VIN2M
MIX,
MUX
VINR3/VIN3P
PGA
Primary
ADC
(CH1R)
PGA
Primary
ADC
(CH2R)
VINR4/VIN3M
PCM1864
PCM1865
Mixer and
Energysense
DSPs
Audio
Serial
Port
(LJ, I2S, TDM)
BCK
LRCK
DOUT
DOUT2
DMIC/DIN
GPIO3/INTC
VREF
GPIO2/INTB/DMCLK
Reference
Mic Bias
Control,
GPIO,
Interrupt,
Digital Mic Interface
Power
Clocks, PLL
GPIO1/INTA/DMIN
MISO/GPIO0/DMIN2
MOSI/SDA
MC/SCL
MS/AD
SCKI
XI
XO
AVDD
AGND
DVDD
IOVDD
LDO
DGND
MD0
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Figure 25. PCM1864 and PCM1865
26
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Functional Block Diagrams (continued)
Power supplies and references have been omitted from this diagram for simplicity. Dotted lines, for the
programmable gain amplifier (PGA) and the additional ADCs, are for the 4-channel devices only. Greyed-out pins
are multifunction pins only.
SCKI
XI
SCK0
(GPIO)
MUX
XO
MUX
Analog
CTRL
Clock Generator
and Detector
PLL
LRCK
BCK_IN
PGA
Controller
BCK
Audio
ADC
On-Chip
Oscillator
Analog PGAs
Audio
ADC
GPIO2/INTB/DMCLK
GPIO1/INTA/DMIN
Digital Mic Inputs
MISO/GPIO0/DMIN2
VINL1/VIN1P
VINL2/VIN1M
VINL3/VIN4P
DSP #1
MIX,
MUX
Digital
S-Curve
Volume
VINL4/VIN4M
FIR/IIR
Filter
Analog
PGAs
VINR1/VIN2P
VINR2/VIN2M
VINR3/VIN3P
DSP #2
Audio
ADC
MIX,
MUX
High-Pass
Filter
6ch Mixer
(ADC + I2S)
Digital
PGA
Audio
ADC
Audio
Serial
TX
DOUT
6ch
Audio
Serial
TX
DOUT2
(GPIO)
Audio
Serial
RX
DIN
(GPIO)
2ch
Energysense
Signal Loss
VINR4/VIN3M
6ch
Digital Zero
Crossing Detect
PGA Zero
Cross
Detect
Sec
ADC
Low-Pass
Filter
High-Pass
Filter
Energysense
Signal Resume
ADC
Master
Clock
MOSI/SDA
GPIO0/MISO
I2C/SPI
Port
Mic
Bias
MS/AD
Mic Bias
INT
1/8
MC/SCL
On-Chip
Oscillator
DC Threshold
Cross Detect
Interrupt
Manager
and
Controller
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Figure 26. Internal Block Diagram of the PCM186x
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9.3 Features Description
9.3.1 Analog Front End
The PCM186x has a flexible front end that accepts either differential or single-ended inputs. The device supports
up to 2.1 VRMS in single-ended mode, and up to 4.2 VRMS in differential mode.
The MIX and MUX circuit before the PGA allows the analog inputs to be mixed and multiplexed in both singleended and differential modes. Mixing functionality is available in software-controlled devices only. No individual
gain controls are available before the PGA. A high-level diagram of the front-end circuitry is shown in Figure 27.
PCM186x
Mic Bias
Generator
Digial Microphone PDM Input
(Software Controlled Devices Only)
VINL1/VIN1P
VINL2/VIN1M
VINL3/VIN4P
Audio
ADC
MIX,
MUX
VINL4/VIN4M
Decimation and
Other Filters
Analog
PGAs
VINR1/VIN2P
VINR2/VIN2M
VINR3/VIN3P
MIX,
MUX
Audio
ADC
Digital
PGA
VINR4/VIN3M
PGA
Zero-Cross Detect
Copyright © 2017, Texas Instruments Incorporated
Figure 27. High Level View of PCM186x Front End-Circuitry
DC blocking capacitors are required on the analog inputs to make sure that correct dc bias conditions are
established. Because the value of the output short-circuit protection resistor in the source product is typically
unknown, issues such as gain error and dc shift may occur if dc blocking capacitors are not used.
For systems where external amplifiers are used before the PCM186x, dc blocking capacitors are still
recommended because the input pins are designed to bias to AVDD / 2. The common mode voltage range is still
limited to the maximum input voltage of the device.
Do not connect unused analog input pins.
28
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Features Description (continued)
9.3.2 Microphone Support
The PCM186x supports analog and digital microphones. Analog signals are treated the same way as line-level
signals, except for the requirement for mic bias. Digital microphone Inputs (PDM inputs) use GPIOs on the
device. Two-channel ADC variants of the PCM186x family can support two digital microphones using a single
data pin and a single clock pin. The 4-channel variants can support up to 4 digital microphones (2 data pins).
The PCM1860 and PCM1861 offer three pin-selectable gain options, 0 dB, 12 dB, or 32 dB.
The PCM1862, PCM1863, PCM1864, and PCM1865 offer programmable gain options from –12 dB to +32 dB
with –0.5-dB step intervals.
Digital microphones typically have a PDM output that can be brought into an ADC digital decimation filter. PDM
microphones require power and a clock. Power should be handled from an external source.
Digital microphone mode gain can be added in the digital PGA and in the mixer. In digital microphone mode, the
PCM1862 and PCM1863 offer up to 18-dB gain (mixer only); whereas, the PCM1864 and PCM1865 offer up to
30-dB gain (18 dB from mixer and 12 dB from digital PGA).
On the PCM1864 and PCM1865, a 2-channel digital mic + 2-channel ADC mode is possible. With the PCM1862
or PCM1863, four channels are only possible with a ADC + I2S input configuration.
9.3.2.1 Mic Bias
The PCM186x can provide a microphone bias to power and bias microphones at 2.6 V on pin 5. Decouple or
filter the Mic Bias pin with an external capacitor. Mic Bias is typically used with a electret microphone. The
internal regulator, as well as an on-chip terminating resistor to GND can also be enabled using register
MIC_BIAS_CTRL (Page.3, 0x15). By default, the device is configured to bypass the on-chip resistor. The mic
bias pin can be left unconnected if not used.
9.3.3 Input Multiplexer (PCM1860 and PCM1861)
The hardware-controlled devices can support a wide gain range using the MD2, MD5 and MD6 configuration pins
as shown in Table 1.
Table 1. Channel and Gain Selection for Hardware-Controlled Devices
MD6
MD5
MD2
ADC1_L / PGA1_L
ADC1_R / PGA1_R
L
L
L
S.E - VINL1 / 0 dB
S.E - VINR1 / 0 dB
L
L
H
S.E - VINL2 / 0 dB
S.E - VINR2 / 0 dB
L
H
L
S.E - VINL3 / 0 dB
S.E - VINR3 / 0 dB
L
H
H
S.E - VINL4 / 0 dB
S.E - VINR4 / 0 dB
H
L
L
S.E - VINL4 / 12 dB
S.E - VINR4 / 12 dB
H
L
H
S.E - VINL4 / 32 dB
S.E - VINR4 / 32 dB
H
H
L
Diff(VIN1P/VIN1M) / 0 dB
Diff(VIN2P/VIN2M) / 0 dB
H
H
H
Diff(VIN3P/VIN3M) / 12 dB
Diff(VIN4P/VIN4M) / 12 dB
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9.3.4 Mixers and Multiplexers (PCM1862, PCM1863, PCM1864, and PCM1865)
The PCM186x software-controlled devices offer a mix and multiplex level of functionality on the front end, as
shown in Figure 27. The switches integrated into the multiplexer can also be switched on in parallel, offering a
direct mix of inputs. This function can be selected by register for each ADC input selection,
ADCX1_INPUT_SEL_X (Page.0, 0x06 → 0x09). In single ended mode, each Audio ADC is tightly coupled to a
dedicated PGA and MUX. ADC1L (and ADC2L on the PCM1864 and PCM1865) is connected a mux that has
input pins VINLx, (x = 1 to 4). ADC1R (and ADC2R on the PCM1864 and PCM1865) is connected to a mux that
has input pins VINRx (x = 1 to 4).
Mixing between the left channels of stereo pairs is possible in the mux dedicated to ADC1L and right channels of
stereo pairs in the mux dedicated to ADC1R. In addition, polarity of the inputs can be inverted using the MSB of
the select register. Mixing left and right sources to create mono mixes can only be done in the digital mixer, post
ADC conversion, or alternatively, other analog inputs can be connected for mixing.
The examples available are shown in Table 2, where [SE] is single-ended, and [DIFF] is a differential input.
Table 2. MUX, MIX, and Polarity Input Selection (1)
REGISTER
CODE
ADC1L AND ADC2L
ADC1R AND ADC2R
0x00
No Selection (Mute)
No Selection (Mute)
0x01
VINL1[SE] (Default)
VINR1[SE] (Default)
0x02
VINL2[SE]
VINR2[SE]
0x03
VINL2[SE] + VINL1[SE]
VINR2[SE] + VINR1[SE]
0x04
VINL3[SE]
VINR3[SE]
0x05
VINL3[SE] + VINL1[SE]
VINR3[SE] + VINR1[SE]
0x06
VINL3[SE] + VINL2[SE]
VINR3[SE] + VINR2[SE]
0x07
VINL3[SE] + VINL2[SE] + VINL1[SE]
VINR3[SE] + VINR2[SE] + VINR1[SE]
0x08
VINL4[SE]
VINR4[SE]
0x09
VINL4[SE] + VINL1[SE]
VINR4[SE] + VINR1[SE]
0x0A
VINL4[SE] + VINL2[SE]
VINR4[SE] + VINR2[SE]
0x0B
VINL4[SE] + VINL2[SE] + VINL1[SE]
VINR4[SE] + VINR2[SE] + VINR1[SE]
0x0C
VINL4[SE] + VINL3[SE]
VINR4[SE] + VINR3[SE]
0x0D
VINL4[SE] + VINL3[SE] + VINL1[SE]
VINR4[SE] + VINR3[SE] + VINR1[SE]
0x0E
VINL4[SE] + VINL3[SE] + VINL2[SE]
VINR4[SE] + VINR3[SE] + VINR2[SE]
0x0F
VINL4[SE] + VINL3[SE] + VINL2[SE] + VINL1[SE]
VINR4[SE] + VINR3[SE] + VINR2[SE] + VINR1[SE]
0x10
{VIN1P, VIN1M}[DIFF]
{VIN2P, VIN2M}[DIFF]
0x20
{VIN4P, VIN4M}[DIFF]
{VIN3P, VIN3M}[DIFF]
0x30
{VIN1P, VIN1M}[DIFF] + {VIN4P, VIN4M}[DIFF]
{VIN2P, VIN2M}[DIFF] + {VIN3P, VIN3M}[DIFF]
(1)
30
Bold items are channel options for hardware-controlled devices.
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9.3.5 Programmable Gain Amplifier
The PCM186x has a two-stage programmable gain amplifier (PGA). Coarse gain adjustment is done in the
analog domain, and fine gain adjustment is done in the digital domain. The ±12-dB analog gain steps are
designed for varying line level inputs, whereas the 20 dB and 32 dB are primarily designed for microphone
inputs, and will likely need additional gain that can be done in the digital domain. The analog gain steps between
–12 dB and +12 dB are in 1-dB steps. Half-dB steps between those points are done in the digital PGA. Gain
steps between 12 dB and 20 dB are all done in the digital domain. (for example, 18-dB gain = 12-dB analog + 6dB digital). The gain structure in the PCM186x is shown in Figure 28.
±12 dB to +32 dB
0.5 dB to 11.5 dB
Audio
ADC
Analog
PGA
Digital
PGA
CIC Filter
±100 dB to +18 dB
Decimation
Filter
±100 dB to 0 dB
Digital
Mixer
Mixer
PGA
S-Curve
Volume
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Figure 28. PCM186x Complete Gain Structure (PGAs and Attenuator)
The analog gain steps within the analog PGA are shown in Figure 29. Again, from –12 dB to +12 dB, the steps
are 1 dB each. The digital PGA has granularity down to 0.5 dB.
PGA
Value
0x74.0
0x0C.0
0x14.0
0x40.0
12 dB
20 dB
32 dB
±12 dB to +12 dB in 1-dB steps
±12 dB
0 dB
Figure 29. Analog Gain Steps With Software-Controlled Devices
The PGA in the PCM186x is a hybrid analog and digital programmable gain amplifier. The devices integrate a
lookup table with the optimal gain balance between analog and digital gain, allowing the gain to be set in a single
register per channel. For example, set 18 dB gain, and the system allocates 12 dB to the analog PGA, and 6 dB
to the digital PGA. This function is called auto gain mapping.
The PGA is a zero crossing detect type, and has the ability to set target gain, and have the device work towards
it (with a timeout if there is no zero crossing). Any changes in the Analog PGA and digital PGA are designed to
step towards the final level. However, any changes in the mixer PGA are immediate. Take care when changing
gain levels in the digital mixer PGA. Alternatively, multiple writes can be made of small enough values that do not
cause significant pops or clicks.
NOTE
Changing gain in the PGA requires the on-chip DSP to be clocked. The DSP is used to
calculate the steps to the target gain. This is not an issue in master mode, but can be a
challenge in slave mode, if the system master is not active yet.
For example, if the current level = 0 dB, then set the target as 3.5 dB. The PGA then increases gain in 0.5-dB
steps towards 3.5 dB.
The auto gain mapping function can by bypassed if required, using manual gain mapping. Manual gain mapping
is useful when using digital microphones, as the PDM input signal bypasses the analog PGA and must be
amplified using the digital PGA. (PGA_MODE (Page.0, 0x19). Digital PGA update is only available in the 4channel devices because the digital gain in 2-channel devices is fixed to 0 dB when manual gain mapping is
enabled.
NOTE
Using the device with a differential inputs increases the full-scale voltage to 4.2 VRMS
(that's 2.1 VRMS per pin, out of phase).
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9.3.6 Automatic Clipping Suppression
The PCM186x software-controlled devices have the ability to automatically lower the gain in 0.5 dB steps under
the following conditions if the ADC is clipping.
The device detects clipping after the decimation filter in the signal chain, shown in Figure 30, and counts the
number of successive clips before responding.
The device also generates an internal interrupt that can be mapped to a GPIO or interrupt pin, allowing the
system microcontroller to make the decision to increase the gain and consider the clipping an isolated event, or
make the decision that the new gain setting is appropriate.
–12 dB to +32 dB
0.5 dB to 12 dB
Analog
PGA
ADC
Digital
PGA
CIC Filter
Mixer
PGA
Decimation
Filter
Digital
Mixer
–100 dB ~ +18 dB
PGA
Controller
Auto
Gain
Control
S-Curve
Volume
–100 dB ~ 0 dB
Zero
Cross
Detector
Digital PGA
Overflow Detector
Copyright © 2017, Texas Instruments Incorporated
Figure 30. Sampling Points Within the PCM186x for Auto Clipping Suppression
9.3.6.1 Attenuation Level
This feature is not designed to be a complete analog gain control. This feature was defined to avoid clipping, and
to inform the system microcontroller of a clipping event, to allow the microcontroller (or the end user) to decide if
the gain should be increased again.
The attenuation is programmable to –3 dB, –4 dB, –5 dB, or –6 dB.
9.3.6.2 Channel Linking
Depending on the application, users may not want to link input channels, however, for the majority of stereo input
applications, its strongly recommended to set the system to track gain across inputs, to maintain balance.
The auto PGA clipping suppression control has the settings shown in Table 3.
Table 3. Auto Clipping Suppression Control Registers
REGISTER NAME
REGISTER
LOCATION
AGC_EN
Pg0 0x05
Enable auto gain control
0: Disable (Default)
1: Enable
CLIP_NUM[1:0]
Pg0 0x05
Start auto gain control after detects CLIP_NUM times of ADC
sample clips
0: 80
1: 40
2: 20
3: 10 (Default)
MAX_ATT[1:0]
Pg0 0x05
Maximum automatic attenuation
0: –3 dB (Default)
1: –4 dB
2: –5 dB
3: –6 dB
DPGA_CLIP_EN
Pg0 0x05
Enable clipping detection after the digital PGA. Note that digital
PGA is post ADC, meaning that there is a short delay before
clipping is detected.
0: Disable (Default)
1: Enable
LINK
Pg0 0x05
Link all channels together if dealing with stereo sources to maintain
balance.
0: Independent control (Default)
1: Ch1[R]/Ch2[L]/Ch2[R] follow Ch1[L] PGA
value.
SMOOTH
Pg0 0x05
Enable smooth transition from step to step (zero crossing).
0: Immediate change
1: Smooth change (default)
32
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9.3.7 Zero Crossing Detect
The PCM186x uses a zero crossing detector to make gain changes only when the incoming signal crosses the
halfway point between negative and positive swing, reducing zipper noise.
There are two sources for the controller, the output of the ADC modulator and the output from the digital PGA.
The analog PGA is sampled at four times the audio sampling rate to detect the zero crossing. The digital PGA is
sampled at a similar rate.
The process for changing gain in the PCM186x is as follows:
1. Detect a zero crossing of the oversampled analog input channel.
2. Increment or decrement the gain toward the target PGA value step by 0.5 dB.
3. Repeat from (1) until arrival at the target PGA value.
4. If zero crossing does not occur for 8192 sample times (= time out), change the gain per sample.
This process does not require intervention by the user. This data serves as information only. Also, please note
that DSPs must be running (clocked) for this functionality to work.
9.3.8 Digital Inputs
9.3.8.1 Stereo PCM Sources
The PCM186x can support stereo PCM data on GPIO pins so that I2S sources, such as wireless modules can
have their data mixed with the incoming analog content. The clock rate of the incoming data (known as DIN)
must be synchronous with the PCM186x software-controlled device main clocks. There is no integrated sample
rate converter on-chip. The DIN signal can be received on GPIO0, 1, 2, or 3, and configured on GPIO_FUNC_X
(Page.0 0x10 and 0x11). The incoming data are then driven to the digital mixer running on DSP2.
The audio format can be configured separately from the output serial port using register RX_TDM_OFFSET (P0,
0x0E).
Inputs can be mixed and volume-controlled before routing to a digital amplifier. Typical uses could be the
connection to a Bluetooth module. The mixing and crossfading is done all in the PCM186x, rather than a hard
switch in external logic. The on-chip PLL also helps create the system master clock (SCKOUT) for poorly
designed I2S Bluetooth modules that do not provide a system clock to drive the system DACs.
If the stereo PCM data source has a requirement to drive the audio clock pins when transmitting in a system
where the PCM186x has not been set to slave yet, the PCM186x does not suffer any damage during clock driver
contention. However, the PCM186x will have some irregular output due to clock errors. In systems with additional
stereo PCM sources that need to be master (such as a S/PDIF receive), set the PCM186x to always be a clock
slave, or switch the device from master to slave mode, before enabling the stereo PCM source.
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9.3.8.2 Digital PDM Microphones
Up to four digital microphones are supported on the PCM1864 and PCM1865, using a shared output clock
(configured from GPIO2) and two data lines, GPIO0 or GPIO1. Two digital microphones are supported on the
PCM1862 and PCM1863, mainly using GPIO1 as the data input. The PCM1860 or PCM1861 does not support
digital microphones. The typical connection and protocol diagrams for these microphones are shown in Figure 31
and Figure 32.
DATA
GPIO1
DATA_L
DIGMIC_IN1
Wired-OR
GPIO1
L/R SEL
CLK
GND
VDD
DATA
DATA_R
L/R SEL
GPIO2
CLK
DIGMIC_CLK (64 × fS)
GPIO2
Copyright © 2017, Texas Instruments Incorporated
Figure 31. Digital Microphone Example Connection
GPIO2
(DIGMIC_CLK)
DATA_L
DATA_R
GPIO1
L(n)
Hi-Z
L(n)
Hi -Z
R(n)
R(n)
L(n+1)
Hi-Z
L(n+1)
Hi -Z
R(n+1)
L(n+2)
Hi-Z
R(n+1)
Figure 32. Digital Microphone Protocol
Supported Digital Microphone clock frequency is as follows, and the frequency depends on required operating
sampling frequency as follows:
• 2.0480 MHz (32 kHz × 64)
• 2.8224 MHz (44.1 kHz × 64)
• 3.072 MHz (48 kHz × 64)
• 3.072 MHz (96 kHz × 32 )
The recommended operating conditions for the Digital MIC are:
• Sampling frequency is 32 kHz or 44.1 kHz
• SCK is 256 × fS.
• Enable Auto Clock Detector (Default)
34
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9.3.9 Clocks
9.3.9.1 Description
The PCM186x family has an extremely flexible clocking architecture. All converters require a master clock
(typically, a 2n power of the sampling rate known as MCK), a bit clock (BCK) that is used to clock the data bit-bybit out of the device (typically running at 64-fS to allow up to 32 bits per channel output), and finally a wordclock
(left-right clock, LRCK) that is used to set the exact sampling point for the ADC.
The PCM186x family can be a clock master (where BCK and LRCK can be internally divided from a provided
master clock) or can be a clock slave, where all clocks (MCK, BCK and LRCK) must be provided by an external
source.
Unlike many competing devices, the PCM186x family can source its master clock from two different sources,
either an external crystal, or a CMOS level (3.3 V or 1.8 V) clock, eliminating the usual external crystal oscillator
circuit required to source a CMOS clock signal.
The PCM186x also differentiates itself by integrating an on-chip phase locked loop (PLL) that can generate real
audio-rate clocks from any clock source between 1 MHz and 50 MHz. The PCM1860 or PCM1861 hardwarecontrolled devices have the ability to detect an absence of MCK in slave mode and automatically generate a
MCK signal. Software-controlled devices, such as the PCM1862, PCM1863, PCM1864 and PCM1865 can have
their PLL programmed to generate audio clocks based on any incoming clock rate. For example, a 12 MHz clock
in the system can be used to generate clocks for a 44.1-kHz system.
9.3.9.2 External Clock-Source Limits
The three different clock sources for the device each have some limits in terms of their input circuitry, as shown
in Table 4. These limits are separate from the internal PLL capability.
On PCM1860 and PCM1861, the highest standard frequency supported by an XTAL is 96 kHz, because the
lowest divider ratio of master clock to LRCK is 256 (24.576 MHz / 256 = 96 kHz). This limitation is not present in
the software-controlled devices because the divider ratio is programmable. However, 192 kHz can be supported
by using an external CMOS source.
Table 4. External Clock-Source Limitations and Notes
CLOCK SOURCE
LIMITS
XTAL
15 MHz → 35 MHz
NOTES
3.3-V CMOS MCLK
1 MHz → 50 MHz
Should be input to SCKI pin. 3.3
V CMOS can be input, even when
IOVDD is 1.8 V
1.8-V CMOS MCLK
1 MHz → 50 MHz
Should be input to XI pin.
9.3.9.3 Device Clock Distribution and Generation
PLLs can be used in all modes to generate the clocks required to run both fixed-function DSPs. The dividers are
automatically configured based on the clock rate detection. The clock architecture shown in Figure 33 allows
non-audio clock sources to be used as clock sources and the PCM186x to continue to run in a master mode,
providing all PCM and I2S clocks for other converters in the system.
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PCM186x
PLL_REF_SEL
(Page 0 Reg 0x28)
XO
SCK
SCK_XI_SEL[1:0]
(Page 0 Reg 0x20)
ADC_CLK_SRC
MUX
(Page 0 Reg 0x20)
Clock
Divider
(0x23)
DSP1_CLK_SRC
MUX
(Page 0 Reg 0x20)
Clock
Divider
(0x21)
DSP #1
DSP2_CLK_SRC
(Page 0 Reg 0x20) MUX
Clock
Divider
(0x22)
DSP #2
PLL Clock
Audio ADC Clocks
XI
PLL
SCKI
SCK
MUX
K×R/P
BCK
PLL Clock
LRCK
K = J.D
J = 1,2,3, « ,62,63
D = 0000,0001, « ,9999
R = 1,2,3,4, « ,15,16
P = 1,2, « ,127,128
SCK
PLL Clock
SCKI
Clock
Divider
PLL Clock
MST_SCK_SRC
(Page 0 Reg 0x20)
SCK_OUT_TO_GPIO
MUX
Autoset by
Master/Slave mode
MUX
SCKI
CLK_DIV_PLL_SCK
(Page 0 Reg 0x25)
Autoset by format
Clock
Divider
MUX
MUX
BCK OUT IN
MASTER MODE
MUX
LRCK OUT IN
MASTER MODE
BCK
CLK_DIV_SCK_BCK
(Page 0 Reg 0x26)
Clock
Divider
LRCK
CLK_DIV_BCK_LRCK
(Page 0 Reg 0x27)
MASTER MODE ONLY
Copyright © 2017, Texas Instruments Incorporated
Figure 33. PCM186x Main Audio Clock Tree and Clock Generation
Target Clock Rates for the ADC, DSP1 and DSP2 can be seen in Table 9 and Table 10. In manual clock
configuration modes, the dividers should be set to achieve these targets. In short, for 2-channel devices, DSP1
and DSP2 should be 256x the sampling rate; for 4-channel devices, DSP1 should be configured for 512x the
sampling rate, and DSP2 should be 256x.
9.3.9.4 Clocking Modes
As shown in Table 5, there are four different clocking modes available on the device that take advantage of the
onboard PLL and clock detection. Advanced clock detection and a smart internal state engine in the PCM186x
can automatically configure the various dividers in the device (see the Device Clock Distribution and Generation
section) with optimized values. Automatic clock configuration is enabled by default, using the register
CLKDET_EN (Page.0, 0x20).
Table 5. PCM186x Clocking Modes
36
NAME
DEVICE
External XTAL/MCK
INPUT
BCK, LRCK DIRECTION
PLL CONFIGURATION
ADC master mode
PCM186x
YES
OUT
Not required
ADC slave mode
PCM186x
YES
IN
Not required
ADC slave PLL mode
PCM186x
NO
IN
Automatic for standard
audio rates
ADC non-audio MCK
PCM1862
PCM1863
PCM1864
PCM1865
YES
OUT
Manual
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9.3.9.4.1 Clock Configuration and Selection for Hardware-Controlled Devices
The PCM1860 and PCM1861 hardware-controlled devices offer both master and slave functionality. In master
mode, a source master clock (of 256x, 384x, or 512x the sampling rate) can be sourced from either an external
crystal (XI/XO) or on an incoming SCK. (see the External Clock-Source Limits section for input rate limitations on
SCK sources) The clock from XI and SCK are OR-ed internally, allowing either to be used.
These hardware-controlled devices can generate the other I2S clocks (BCK and LRCK) in master mode (with
dividers set in MD0 and MD1) or be a clock slave to MCK,BCK and LRCK. In this scenario, the device autodetects the clock divider ratio.
In master mode, BCK per LRCK is fixed at 64, and allows up to 32 bits per channel.
Selection of the appropriate master or slave, and clock ratio between MCK and fS can be done using MD0 and
MD1.
Table 6 shows the suggested master clock rates for each of the sample rates supported. For slave mode, set
BCK per LRCK to 64.
Table 6. External Master Clock Rate Versus Sampling Frequency
SYSTEM CLOCK FREQUENCY (MHz)
SAMPLING RATE FREQUENCY
(kHz)
256 × fS
384 × fS
512 × fS
8.0
2.048
3.072
4.096
16.0
4.096
6.144
8.192
32.0
8.1920
12.2880
16.3840
44.1
11.2896
16.9344
22.5792
48.0
12.2880
18.4320
24.5760
64.0
16.3840
24.5760
32.7680
88.2
22.5792
33.8688
45.1584
96.0
24.5760
36.8640
49.1520
176.4
45.1584
—
—
192.0
49.1520
—
—
9.3.9.4.2 Clock Sources for Software-Controlled Devices
The PCM1862, PCM1863, PCM1864, and PCM1865 software-controlled devices support a wide range of options
for generating the clocks required to operate the ADC section, as well as an interface and other control blocks,
as shown in Figure 34.
The clocks for the PLL require a source reference clock. This clock source can be configured on software
devices as the XTAL, SCK or BCK.
These software-controlled devices share a similar clock tree for the generation and distribution of clocks, as
shown in Figure 33.
Register CLK_MODE (Page.0 0x20) is used to configure the clock configuration. Bits [5:7] configure the OR and
MUX for the incoming MCLK.
Register MST_MODE (Page.0 0x20) is used to set the device in master or slave mode. Bits [1:3] set clock
sources for the ADC, DSP1 and DSP2. These can mostly be ignored for the most common applications, but are
provided for advanced users.
Register MST_SCK_SRC (Page.0 0x20) is used to set the source of the SCKO in master mode. The master
mode BCK and LRCK will be a division of this. The selection is either SCKI/XTI or PLL. PLL can be used when
you have a non-audio rate reference clock (BCK or SCKI), as well as when you have an SCKI that is much too
slow for what is required for SCKO.
Most applications will use XTI/SCKI as the source for master mode SCK.
The CLKDET_EN (Page.0, 0x20) register bit (auto clock detector) is important; the clock detector is mainly
functional for slave modes, and for master modes where the master clock is a 256×, 384×, or 512× multiple of
the incoming data rate.
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The relation between the master mode configuration registers is shown in Table 7.
NOTE
Non audio related master clock sources can be used with the PCM186x software controlled devices providing the PLL is programmed manually. CLKDET_EN should be set
to 0.
The result of configurations can be checked by reading registers FS_INFO / CURRENT_BCK_RATIO (Page.0
0x73 and 0x74).
NOTE
In master mode on software-controlled devices, only the following BCK to LRCK ratios are
supported: 32x, 48x, 64x and 256x. 128x is not supported
Table 7. Master Mode Clock Configuration Registers
CLOCK MULTIPLEXER
FUNCTION
BITS
MST_SCK_SRC
Master mode SCK source
Page 0, register 0x20, bits[5]
DIVIDER
FUNCTION
BITS
CLK_DIV_PLL_SCK
Clock divider of PLL to SCKOUT
divider (for example, master
mode or BCK PLL slave mode
with SCK for the rest of the
system)
Pg0, reg 0x25, bits[0:6]
CLK_DIV_SCK_BCK
Ratio of master clock (SCK) to bit
clock (BCK)
Pg0, reg 0x26, bits[0:6]
CLK_DIV_BCK_LRCK
Ratio of bit clock (BCK) to leftright clock (LRCK)
Pg0, reg 0x27, bits[0:6]
PCM186x
PLL_REF_SEL
(Page 0 Reg 0x28)
XO
SCK
SCK_XI_SEL[1:0]
(Page 0 Reg 0x20)
ADC_CLK_SRC
MUX
(Page 0 Reg 0x20)
Clock
Divider
(0x23)
DSP1_CLK_SRC
MUX
(Page 0 Reg 0x20)
Clock
Divider
(0x21)
DSP #1
DSP2_CLK_SRC
(Page 0 Reg 0x20) MUX
Clock
Divider
(0x22)
DSP #2
PLL Clock
Audio ADC Clocks
XI
SCKI
PLL
MUX
SCK
K×R/P
BCK
PLL Clock
LRCK
K = J.D
J = 1,2,3, « ,62,63
D = 0000,0001, « ,9999
R = 1,2,3,4, « ,15,16
P = 1,2, « ,127,128
SCK
PLL Clock
SCKI
Clock
Divider
PLL Clock
MST_SCK_SRC
(Page 0 Reg 0x20)
SCK_OUT_TO_GPIO
MUX
Autoset by
Master/Slave mode
MUX
SCKI
CLK_DIV_PLL_SCK
(Page 0 Reg 0x25)
Autoset by format
Clock
Divider
MUX
MUX
BCK OUT IN
MASTER MODE
MUX
LRCK OUT IN
MASTER MODE
BCK
CLK_DIV_SCK_BCK
(Page 0 Reg 0x26)
Clock
Divider
LRCK
CLK_DIV_BCK_LRCK
(Page 0 Reg 0x27)
MASTER MODE ONLY
Copyright © 2017, Texas Instruments Incorporated
Figure 34. PLL Clock Source and Clock Distribution
38
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9.3.9.4.3 Clocking Configuration and Selection for Software-Controlled Devices
9.3.9.4.3.1 Target Clock Rates for ADC, DSP1 and DSP2
The ADC, DSP1 and DSP2 each have specific minimum clock requirements that can be driven from either the
incoming SCK or the output of the PLL, as shown in Table 8.
Table 8. Minimum Required Clock Ratios for ADC, DSP1 and DSP2
CORE
2-CHANNEL DEVICE RATIO
4-CHANNEL DEVICE RATIO
ADC
128x output sampling rate
128x output sampling rate
DSP #1
256x output sampling rate
512x output sampling rate
DSP #2
256x output sampling rate
256x output sampling rate
9.3.9.4.3.2 Configuration of Master Mode
If an external, high-quality MCLK is available (either on the SCK pin or XTAL), then configure the PCM186x to
run in master mode where possible, with the ADC and serial ports being driven from the MCLK or SCK source.
The on-chip DSPs may continue to require clocks from the PLL, as they run from a much higher clock rate.
Clock MUXs and overall configuration can be done in register Page0, 0x20. For the best performance in master
mode, the automatic clock configuration circuitry configures the clocks as shown in Table 9 and Table 10, if the
device is a PCM186x 2-channel or 4-channel, software-controlled device. The tables below show data at 48 kHz
multiples, the ratios for multiples of 44.1 kHz are identical, while the absolute MHz values will be multiples of 44.1
kHz instead of 48 kHz.
This automatic configuration can be bypassed using registers, starting from CLKDET_EN (Page.0, 0x20).
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Table 9. PCM1862 and PCM1863 (2-Channel) Clock Divider and Source Control in the Presence of External SCK
fS
SCK FREQ
(MHz)
PLL RATIO
PLL FREQ
(MHz)
PLL CONFIG
128
1.024
12288
98.304
256
2.048
12288
384
3.072
12288
512
4.096
Off
768
6.144
Off
SCK RATIO
2.048
6144
DSP2 CLOCK
ADC CLOCK
SOURCE
DIVIDER
DSP 2
CLOCK (MHz)
SOURCE
DIVIDER
ADC CLOCK
(MHz)
SOURCE
DIVIDER
P=1,R=2,
J=48, D=0
2.048
PLL
48
2.048
PLL
48
1.024
PLL
96
98.304
P=1,R=2,
J=24, D=0
2.048
SCK
1
2.048
SCK
1
1.024
SCK
2
98.304
P=1,R=2,
J=16, D=0
2.048
SCK
1
2.048
SCK
1
1.024
SCK
3
2.048
SCK
2
2.048
SCK
2
1.024
SCK
4
3.072
SCK
2
3.072
SCK
2
1.024
SCK
6
98.304
P=1,R=2,
J=24, D=0
4.096
PLL
24
4.096
PLL
24
2.048
PLL
48
4.096
SCK
1
4.096
SCK
1
2.048
SCK
2
6.144
SCK
1
6.144
SCK
1
2.048
SCK
3
8 kHz
128
DSP1 CLOCK
DSP1 CLOCK
(MHz)
256
4.096
6144
98.304
P=1,R=2,
J=12, D=0
384
6.144
6144
98.304
P=1,R=2, J=8,
D=0
16 kHz
512
8.192
Off
4.096
SCK
2
4.096
SCK
2
2.048
SCK
4
768
12.288
Off
6.144
SCK
2
6.144
SCK
2
2.048
SCK
6
12.288
PLL
8
12.288
PLL
8
6.144
PLL
16
128
6.144
2048
98.304
P=1,R=2, J=8,
D=0
256
12.288
2048
98.304
P=2,R=2, J=8,
D=0
12.288
SCK
1
12.288
SCK
1
6.144
SCK
2
98.304
P=3,R=2, J=8,
D=0
18.432
SCK
1
18.432
SCK
1
6.144
SCK
3
48 kHz
384
18.432
2048
512
24.576
Off
12.288
SCK
2
12.288
SCK
2
6.144
SCK
4
768
36.864
Off
18.432
SCK
2
18.432
SCK
2
6.144
SCK
6
128
12.288
1024
98.304
P=4,R=2,
J=16, D=0
24.756
PLL
4
24.756
PLL
4
6.144
SCK
2
256
24.576
1024
98.304
P=8,R=2,
J=16, D=0
24.756
SCK
1
24.756
SCK
1
6.144
SCK
4
98.304
P=12,R=2,
J=16, D=0
24.756
SCK
1
24.756
SCK
1
6.144
SCK
6
96 kHz
384
36.864
512
49.152
128
24.576
1024
Off
512
24.756
SCK
2
24.756
SCK
2
6.144
SCK
8
98.304
P=4,R=2, J=8,
D=0
49.152
PLL
2
49.152
PLL
2
6.144
SCK
4
98.304
P=8,R=2, J=8,
D=0
49.152
SCK
1
49.152
SCK
1
6.144
SCK
8
192 kHz
256
40
49.152
512
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Table 10. PCM1864 and PCM1865 (4-Channel) Clock Divider and Source Control With External SCK
fS
8 kHz
16 kHz
48 kHz
SCK FREQ
(MHz)
PLL RATIO
PLL FREQ
(MHz)
PLL CONFIG
128
1.024
12288
98.304
256
2.048
12288
384
3.072
12288
512
4.096
SCK RATIO
DSP1 CLOCK
DSP2 CLOCK
ADC CLOCK
DSP1 CLOCK
(MHz)
SOURCE
DIVIDER
DSP 2
CLOCK (MHz)
SOURCE
DIVIDER
ADC CLOCK
(MHz)
SOURCE
DIVIDER
P=1,R=2,
J=48, D=0
4.096
PLL
24
2.048
PLL
48
1.024
PLL
96
98.304
P=1,R=2,
J=24, D=0
4.096
PLL
24
2.048
SCK
1
1.024
SCK
2
98.304
P=1,R=2,
J=16, D=0
4.096
PLL
24
2.048
SCK
1
1.024
SCK
3
4.096
SCK
1
2.048
SCK
2
1.024
SCK
4
4.096
PLL
24
3.072
SCK
2
1.024
SCK
6
Off
768
6.144
6144
98.304
P=1,R=2, J=8,
D=0
128
2.048
6144
98.304
P=1,R=2,
J=24, D=0
8.192
PLL
12
4.096
PLL
24
2.048
PLL
48
256
4.096
6144
98.304
P=1,R=2,
J=12, D=0
8.192
PLL
12
4.096
SCK
1
2.048
SCK
2
384
6.144
6144
98.304
P=1,R=2, J=8,
D=0
8.192
PLL
12
6.144
SCK
1
2.048
SCK
3
512
8.192
8.192
SCK
1
4.096
SCK
2
2.048
SCK
4
8.192
PLL
12
6.144
SCK
2
2.048
SCK
6
Off
768
12.288
2048
98.304
P=4,R=2,
J=16, D=0
128
6.144
2048
98.304
P=1,R=2, J=8,
D=0
24.576
PLL
4
12.288
PLL
8
6.144
PLL
16
256
12.288
2048
98.304
P=4,R=2,
J=16, D=0
24.576
PLL
4
12.288
SCK
1
6.144
SCK
2
384
18.432
2048
98.304
P=3,R=2, J=8,
D=0
24.576
PLL
4
18.432
SCK
1
6.144
SCK
3
512
24.576
24.576
SCK
1
12.288
SCK
2
6.144
SCK
4
24.576
PLL
4
18.432
SCK
2
6.144
SCK
6
Off
768
36.864
2048
98.304
P=3,R=2, J=4,
D=0
128
12.288
1024
98.304
P=4,R=2,
J=16, D=0
49.152
PLL
2
24.756
PLL
4
6.144
SCK
2
256
24.576
1024
98.304
P=4,R=2, J=8,
D=0
49.152
PLL
2
24.756
SCK
1
6.144
SCK
4
384
36.864
1024
98.304
P=12,R=2,
J=16, D=0
49.152
PLL
2
24.756
SCK
1
6.144
SCK
6
512
49.152
49.152
SCK
1
24.756
SCK
2
6.144
SCK
8
98.304
PLL
1
49.152
PLL
2
6.144
SCK
4
98.304
PLL
1
49.152
SCK
1
6.144
SCK
8
96 kHz
Off
128
24.576
512
98.304
P=4,R=2, J=8,
D=0
256
49.152
512
98.304
P=8,R=2, J=8,
D=0
192 kHz
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9.3.9.4.4 BCK Input Slave PLL Mode
The PCM186x software-controlled devices can generate an internal MCLK system clock using the PLL
(referenced from an external input BCK) in slave mode. Supported sampling frequencies are listed in Table 11.
While the PCM186x can support down to 8 kHz, analog performance is not tested at this rate.
Table 11. Auto PLL BCK Requirements
SAMPLING
FREQUENCY
BCK RATIO
TO LRCK
BCK
FREQUENCY
8 kHz
256
2.048
16 kHz
48 kHz
96 kHz
192 kHz
64
1.024
256
4.096
32
1.536
48
2.304
64
3.072
256
12.288
32
3.072
48
4.608
64
6.144
256
24.576
32
6.144
48
9.216
64
12.288
256
49.152
In software SPI or I2C mode, a PCM186x software-controlled device can use the on-chip crystal oscillator, if a
CMOS clock source is not available. Audio clocks can be generated through the PLL from the non-audio
standard CMOS or crystal frequency (and then can be divided down as described previously). This function is not
available in hardware mode.
The 8-kHz sampling rate is only supported if an external MCK is provided. The autodetect and PLL system
support frequencies as low as 32 kHz. Analog performance is not tested in this mode.
The clock tree can also be programmed manually, with the settings shown in Table 12 and Table 13.
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Table 12. PCM1862 and PCM1863 (2-Channel) PLL BCK Settings
DSP1 CLOCK DIVIDER
2-CHANNEL MODE
fS
BCK RATIO
BCK FREQ
(MHz)
PLL RATIO
PLL FREQ
(MHz)
PLL CONFIG
DSP1 CLOCK
(MHz)
2-CHANNEL
SOURCE
DIVIDER
SOURCE
DIVIDER
SOURCE
DIVIDER
8 kHz
256
2.048
12288
98.304
P=1,R=2,
J=24, D=0
2.048
PLL
48
2.048
PLL
48
1.024
PLL
96
64
1.024
6144
98.304
P=1,R=2,
J=48, D=0
4.096
PLL
24
4.096
PLL
24
2.048
PLL
48
4.096
PLL
24
4.096
PLL
24
2.048
PLL
48
DSP2 CLOCK
(MHz)
DSP2 CLOCK DIVIDER
ADC CLOCK
(MHz)
ADC CLOCK DIVIDER
16 kHz
256
4.096
6144
98.304
P=2,R=2,
J=24, D=0
32
1.536
2048
98.304
P=1,R=2,
J=32, D=0
12.288
PLL
8
12.288
PLL
8
6.144
PLL
16
48
2.304
2048
92.16
P=1,R=2,
J=20, D=0
15.36
PLL
6
15.36
PLL
6
6.144
PLL
15
64
3.072
2048
98.304
P=1,R=2,
J=16, D=0
12.288
PLL
8
12.288
PLL
8
6.144
PLL
16
256
12.288
2048
98.304
P=4,R=2,
J=16, D=0
12.288
PLL
8
12.288
PLL
8
6.144
PLL
16
24.576
PLL
4
24.576
PLL
4
6.144
PLL
16
48 kHz
32
3.072
1024
98.304
P=1,R=2,
J=16, D=0
48
4.608
1024
98.304
P=3,R=2,
J=32, D=0
24.576
PLL
4
24.576
PLL
4
6.144
PLL
16
24.576
PLL
4
24.576
PLL
4
6.144
PLL
16
96 kHz
64
6.144
1024
98.304
P=2,R=2,
J=16, D=0
256
24.576
1024
98.304
P=8,R=2,
J=16, D=0
24.576
PLL
4
24.576
PLL
4
6.144
PLL
16
49.152
PLL
2
49.152
PLL
2
6.144
PLL
16
32
6.144
512
98.304
P=2,R=2,
J=16, D=0
48
9.216
512
98.304
P=3,R=2,
J=16, D=0
49.152
PLL
2
49.152
PLL
2
6.144
PLL
16
64
12.288
512
98.304
P=4,R=2,
J=16, D=0
49.152
PLL
2
49.152
PLL
2
6.144
PLL
16
256
49.152
512
98.304
P=16,R=2,
J=16, D=0
49.152
PLL
2
49.152
PLL
2
6.144
PLL
16
192 kHz
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Table 13. PCM1864 and PCM1865 (4-Channel) PLL BCK Settings
DSP1 CLOCK DIVIDER
4-CHANNEL MODE
fS
BCK RATIO
BCK FREQ
(MHz)
PLL RATIO
PLL FREQ
(MHz)
PLL CONFIG
DSP1 CLOCK
(MHz)
4-CHANNEL
SOURCE
DIVIDER
SOURCE
DIVIDER
SOURCE
DIVIDER
8 kHz
256
2.048
12288
98.304
P=1,R=2,
J=24, D=0
4.096
PLL
24
2.048
PLL
48
1.024
PLL
96
64
1.024
6144
98.304
P=1,R=2,
J=48, D=0
8.192
PLL
12
4.096
PLL
24
2.048
PLL
48
8.192
PLL
12
4.096
PLL
24
2.048
PLL
48
DSP2 CLOCK
(MHz)
DSP2 CLOCK DIVIDER
ADC CLOCK
(MHz)
ADC CLOCK DIVIDER
16 kHz
256
4.096
6144
98.304
P=2,R=2,
J=24, D=0
32
1.536
2048
98.304
P=1,R=2,
J=32, D=0
24.576
PLL
4
12.288
PLL
8
6.144
PLL
16
48
2.304
2048
92.16
P=1,R=2,
J=20, D=0
30.72
PLL
3
15.36
PLL
6
6.144
PLL
15
64
3.072
2048
98.304
P=1,R=2,
J=16, D=0
24.576
PLL
4
12.288
PLL
8
6.144
PLL
16
256
12.288
2048
98.304
P=4,R=2,
J=16, D=0
24.576
PLL
4
12.288
PLL
8
6.144
PLL
16
49.152
PLL
2
24.576
PLL
4
6.144
PLL
16
48 kHz
32
3.072
1024
98.304
P=1,R=2,
J=16, D=0
48
4.608
1024
98.304
P=3,R=2,
J=32, D=0
49.152
PLL
2
24.576
PLL
4
6.144
PLL
16
49.152
PLL
2
24.576
PLL
4
6.144
PLL
16
96 kHz
64
6.144
1024
98.304
P=2,R=2,
J=16, D=0
256
24.576
1024
98.304
P=8,R=2,
J=16, D=0
49.152
PLL
2
24.576
PLL
4
6.144
PLL
16
98.304
PLL
1
49.152
PLL
2
6.144
PLL
16
32
6.144
512
98.304
P=2,R=2,
J=16, D=0
48
9.216
512
98.304
P=3,R=2,
J=16, D=0
98.304
PLL
1
49.152
PLL
2
6.144
PLL
16
64
12.288
512
98.304
P=4,R=2,
J=16, D=0
98.304
PLL
1
49.152
PLL
2
6.144
PLL
16
256
49.152
512
98.304
P=16,R=2,
J=16, D=0
98.304
PLL
1
49.152
PLL
2
6.144
PLL
16
192 kHz
44
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9.3.9.4.5 Software-Controlled Devices ADC Non-Audio MCK PLL Mode
This mode is mainly used for systems driving TDM ports or systems where the MCK is not related to the audio
sampling rate. For example, where the audio ADC must share a clock source with the central processor
(commonly, 12 MHz, 24 MHz, or 27 MHz.)
Under these conditions, set automatic configuration register CLKDET_EN (Page 0, 0x20) to 0, and manually
configure the PLL using registers (Page 0, 0x28 - 0x2D); see Software-Controlled Devices Manual PLL
Calculation. The clock tree must also be set to use the PLL output as the master mode SCKOUT source, and
have the appropriate SCK-to-BCK and BCK-to-LRCK dividers set.
9.3.9.5 Software-Controlled Devices Manual PLL Calculation
The PCM186x has an on-chip PLL with fractional multiplication to generate the clock frequency required by the
audio ADC, modulator and digital signal processing blocks. The programmability of the PLL allows operation
from a wide variety of clocks that may be available in the system. The PLL input supports clocks varying from 1
MHz to 50 MHz, and is register programmable to enable generation of required sampling rates with fine
precision.
The PLL by default is enabled because the on-chip fixed function DSPs require high clock rates to complete all
various decimation, mixing, and level-detection functions. The PLL output clock PLLCK is given by Equation 1:
PLLCKIN u R u JD
PLLCKIN u R u K
PLLCK
or PLLCK
P
P
where
•
•
•
•
R = 1, 2, 3, 4, ….. 15, 16
J = 1, 2, 3, 4,...63, and D = 0000, 0001, 0002...9999
K = J.D
P = 1, 2, 3...15
(1)
R, J, D, and P are register programmable. J is the integer portion of K (the numbers to the left of the decimal
point), while D is the fractional portion of K (the numbers to the right of the decimal point, assuming four digits of
precision).
Examples:
If K = 8.5, then J = 8, D = 5000
If K = 7.12, then J = 7, D = 1200
If K = 14.03, then J = 14, D = 0300
If K = 6.0004, then J = 6, D = 0004
When the PLL is enabled and D = 0000 (that is, an integer multiple), the following conditions must be satisfied:
1 MHz ≤ (PLLCKIN / P) ≤ 20 MHz
64 MHz < (PLLCKIN × K × R / P) < 100 MHz
1 ≤ J ≤ 63
When the PLL is enabled and D ≠ 0000 (that is, a noninteger multiple), the following conditions must be satisfied:
6.667 MHz ≤ (PLLCLKIN / P) ≤ 20 MHz
64 MHz < (PLLCKIN x K x R / P) < 100 MHz
4 ≤ J ≤ 11
R=1
When the PLL is enabled,
fSref = (PLLCLKIN × K × R) / (N × P) :
N is selected so that fSref × N = PLLCLKIN × K × R / P is in the allowable range.
Example:
MCLK = 12 MHz and fSref = 44.1 kHz, (N=2048)
Select P = 1, R = 1, K = 7.5264, which results in J = 7, D = 5264
Example:
MCLK = 12 MHz and fSref = 48.0 kHz, (N=2048)
Select P = 1, R = 1, K = 8.192, which results in J = 8, D = 1920
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The PLL can be programmed using page 0, registers 0x28 thru 0x2D. Turn on the PLL using page 0, register
0x28, D(0). The variable P can be programmed using page 0, register 0x29, D(3:0). The variable R can be
programmed using page 0, register 0x2A, D(3:0). The variable J can be programmed using page 0, register
0x2B, D(5:0). The variable D is 14-bits and is programmed into two registers. The MSB portion is programmed
using page 0, register 0x2D, D(5:0), and the LSB portion is programmed using page 0, register 0x2C, D(7:0).
The variable D is set when the LSB portion is programmed.
Values are programmed in the registers in Table 14.
Table 14. PLL Coefficient Registers
REGISTER
FUNCTION
PLL_EN
PLL enable, lock status and
PLL reference
BITS
Page 0, register 0x28
PLL_P
PLL P
Page 0, register 0x29
PLL_J
PLL J
Page 0, register 0x2B
PLL_Dx
PLL D
PLL_R
PLL R
Page 0, register 0x2C (least significant bits)
Page 0, register 0x2D (most significant bits)
Page 0, register 0x2A
9.3.9.6 Clock Halt and Error
The status of the halt and error detector can be read from register CLK_ERR_STAT (Page.0, 0x75).
9.3.9.7 Clock Halt and Error Detect
The PCM186x has a clock error detection block inside that continues to monitor the ratio of BCK to LRCK.
If a clock error is detected (such as an unexpected number of BCKs per LRCK), then the device goes into
standby mode.
If all the clocks are stopped going into the device, then the device shifts into sleep state, and begins
Energysense signal detect mode.
When a clock error occurs, the PCM186x starts the following sequence:
1. Mute audio output immediately (without volume ramp down)
2. Wait until proper clock is supplied (known as Clock Waiting State)
3. Restart clock detection. The PLL and all clock dividers are reconfigured with the result of the detection.
4. Start fade-in
If the device stops transmitting data, the first step is to read CLK_ERR_STAT (Page.0 0x72). The least
significant nibble shows the device status. Value 0x01 suggests Clock Waiting State, at which point the clock
error status can be read in register STATE (Page.0 0x75). The clock detection logic is shown in Table 15.
Table 15. Summary of Clock Detection Logic
46
SCK
BCK
LRCK
RESULT
ACTION
ACTIVE
ACTIVE
ACTIVE
No error
Normal operation
ACTIVE
ACTIVE
HALT
Clock error
Enter clock waiting state
ACTIVE
HALT
ACTIVE
Clock error
Enter clock waiting state
ACTIVE
HALT
HALT
Clock error
Enter SLEEP
HALT
ACTIVE
ACTIVE
No error
Enter BCK PLL mode
HALT
ACTIVE
HALT
Clock error
Enter clock waiting state
HALT
HALT
ACTIVE
Clock error
Enter clock waiting state
HALT
HALT
HALT
Clock error
Enter SLEEP
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In addition, the device uses an on-chip oscillator to detect errors in the rate of present clocks. That logic is shown
in Table 16.
Table 16. Summary of Clock Error Logic
SCK/LRCK Ratio
BCK/LRCK RATIO
LRCK
ERROR DETECT
ACTION
-
-
< 8 kHz or > 192 kHz
fS error
Enter clock waiting state
Not 128 / 256 /
384 / 512 / 768
-
8 / 16 / 32 / 44.1 / 48 kHz
SCK error
Enter the clock waiting state, tie I2S
output to 0
Not 128 / 256 /
384 / 512
-
88.2 / 96 kHz
SCK error
Enter the clock waiting state, tie I2S
output to 0
Not 128 / 256
-
176.4 / 192 kHz
SCK error
Enter the clock waiting state, tie I2S
output to 0
Not 256 / 64 / 48 / 32
8 / 16 / 32 / 44.1 / 48 / 88.2
/ 96 / 174.6 / 196 kHz
BCK error
Enter the clock waiting state, tie I2S
output to 0
>192 kHz
fS error
Enter the clock waiting state, tie I2S
output to 0
In an application with a non-audio standard SCK coming into the product, the clock error detection on the SCK
pin can be ignored by disabling the auto clock detector (CLKDET_EN Page.0 0x20).
9.3.9.8 Changes in Clock Sources and Sample Rates
In slave mode, when changing clock sources, the PCM186x requires at least three BCK clocks of no clock or
data for the device to reconfigure after clocks resume (if the device is in auto clock config mode).
For example, auto clock config mode: StateA = 48 kHz, change to StateB = 44.1 kHz
For changing from state A to State B:
• Leaving State A
• Hold clocks (or HiZ from external) for 3 BCK minimum
• Change clocks
• Allow ~100 µs (at least 3 BLKs at 48 kHz) for the device to reconfigure
• Data ramp back in on zero-crossing ramp (if zero crossing has not been disabled in software mode)
• Transition to State B complete
In master mode, simply switching the I/O pins on the hardware-controlled devices, or changing the sampling rate
register should change the sampling rate.
NOTE
Hardware-controlled devices cannot switch from XTAL master mode to external slave
mode because the XTAL continues clocking the internal SCLK and not be in sync to the
new external clocks. However, this switch can be done in software mode.
9.3.10 Analog-to-Digital Converters (ADCs)
9.3.10.1 Main Audio ADCs
The SNR of the primary ADCs in the PCM186x are 103 dB (for PCM1860, PCM1862, PCM1864), or 110 dB (for
PCM1861, PCM1863, PCM1865), with 40-kHz bandwidth that is tightly coupled to dedicated PGAs and input
multiplexers. Often in this document, references are made to ADC1L and ADC1R (or CH1_L and CH1_R), the
main left and right ADCs present in the PCM1862, PCM1863, PCM1864 and PCM1865. References to ADC2L
and ADC2R are the other pair of left and right ADCs present only in the PCM1864 and PCM1865.
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9.3.10.2 Secondary ADC: Energysense and Analog Control
The PCM186x has a secondary ADC, shown in Figure 35, that is used for signal level detection or dc level
change detection.
DSP#1
VINL1/VIN1P
VINL2/VIN1M
Audio
ADC
VINL3/VIN4P
VINL4/VIN4M
4fS
Decimation
Filter
DSP#2
PCM186x
Energysense Loss of
Signal Flag
Trigger Mask Register
(SIGDET_TRIG_MASK)
8:1
MUX
VINR1/VIN2P
Status Register
(SIGDET_STAT)
HPF
Sticky
Registers (1)
VINR2/VIN2M
Secondary 4fS
ADC
VINR3/VIN3P
LPF
HPF
Signal Resume or Present Flag
Control Voltage Change Flag
VINR4/VIN3M
SIGDET_CH_MODE
[7:0]
Scan All
Channels
ADC
Master
Clock
On-Chip
Oscillator
Interrupt
Controller
INTx
1/8
Sleep
Mode
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(1)
Reset ports not shown.
Figure 35. Secondary ADC Architecture
The secondary ADC has two main purposes in the PCM186x family. The primary purpose is to act as a low
power signal detection system, to aid with system wakeup from sleep. TI calls this functionality energysense.
Other functionality includes the ability to use any spare analog inputs as generic ADC inputs, for connection to
simple analog sources, such as voltages from control potentiometers. TI calls this functionality controlsense or dc
control.
The secondary ADC is a one-bit, delta-sigma type ADC. The sampling rate is directly connected to the main ADC
audio sampling clocks during ACTIVE functionality. When the device is in sleep state, then the secondary ADC
switches the clock source to an on-chip oscillator (if there are no other clock sources).
In sleep mode, the inputs are all treated as single-ended inputs. Differential inputs are not supported in this mode
because the PGA must be powered up, and thus, consume more power.
In active mode, energysense audio signal detection on any channels other than the primary is not available;
however, other inputs can be read using the secondary ADC channel driven in controlsense mode.
In sleep mode, each input pin can be configured to perform either energysense or controlsense. Both functions
can generate interrupts when their thresholds are crossed. All inputs will be cycled through and converted
continuously, performing either an enerysense or a controlsense function.
In active mode, any dc based controls will either need to be polled continuously by the systems host, or
streamed out continuously in a 6ch TDM mode. In an application, this may mean that the main input is being
converted, while the system battery level, or analog volume control knob position is polled using controlsense.
To make the secondary ADC as flexible as possible in both energysense and controlsense modes, the following
controls and coefficients are available in the register map. More details on each are in the relevant following
sections.
• Coefficients for the secondary ADC low-pass filter
• Coefficients for the secondary ADC high-pass filter
• Reference voltage and interrupt voltage delta for each input in controlsense mode
• Signal loss conditions (time and threshold)
• Signal resume conditions (threshold)
• Interrupt behavior (for example, ping every x ms if host does not clear)
• Scan time for each single ended input
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9.3.10.2.1 Secondary ADC Analog Input Range
To match the dynamic range of the secondary ADC to an incoming line level signal, an overall attenuation is
applied to the incoming signal. This attenuation is also present in controlsense mode. The impact of this is that
the secondary ADC in controlsense mode can only detect control signals up to 4.3 V. Exact values will vary a
small amount from device to device along with the gain error.
Input impedance of the secondary ADC is designed to be 20 kΩ.
9.3.10.2.2 Frequency Response of the Secondary ADC
The natural response of the secondary ADC is not flat by frequency. However, the frequency response can be
flattened, so that all frequencies are equally sensitive to the energysense detector by modifying the LPF or HPF
biquads in the DSP.
9.3.10.3 Secondary ADC Controlsense DC Level Change Detection
This function is used for external analog controls, such as potentiometers to set volume, tone control, or a
sensor. The data for control sense has no high pass filter applied to it, even if the main audio path does have a
HPF enabled.
AS shown in Figure 36, there are two parameters for the dc level change detection: reference level
(REF_LEVEL) and difference level (DIFF_LEVEL). Each input pin (input 1 through 8) has a different reference
and difference level.
(1) DIFF_LEVEL > 0
REF_LEVEL
(2) DIFF_LEVEL < 0
Time
An interrupt is generated
Figure 36. DC Detection Function
Users set a reference point, and a difference point. If the voltage at the control point crosses the difference point
then an interrupt is driven from the device. This is useful for filtering out noise, as well as reducing the load on
the host processor for controls that tend to be set and forget (such as volume).
The data from the secondary ADC can also be streamed out of the device in TDM form and directly from the I2C
register map. AUXADC_DATA_CTRL (Page.0 0x58) is used to configure and check the status of the DC
detector.
This feature (thresholds and interrupts) is available in both active and sleep modes. In sleep mode, the device
automatically scans through each channel designated a controlsense input. In active mode, the scanning will
need to be done manually by a host microcontroller by modifying the SEC_ADC_INPUT_SEL (Page.0, 0x0A)
register.
Most applications requiring the use of a potentiometer for control can simply use the
SIGDET_DC_LEVEL_CHx_x registers to read the 8-bit value. To enable the SIGDET_DC_LEVEL_CHx_x
registers to work, then the DC_NOLATCH AUXADC_DATA_CTRL (Page.0, 0x58, B[7]) should be set to 1, and
the appropriate input pins should be set to controlsense inputs SIGDET_CH_MODE (Page.0, 0x30)
Direct 16-bit two's compliment reads from the secondary ADC can be done using AUXADC_DATA_CTRL
(Page.0, 0x58) includes a latch function that is used to read the data the secondary ADC on demand in 16-bit
two's compliment format from registers 0x59 and 0x5A.
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9.3.11 Energysense
Energysense functionality has been added to the PCM186x to aid with auto-sleep and auto-wakeup for end
equipment systems that are expected to be sold within the European Union. The latest Ecodesign legislation in
Europe has demanded that products consume less than 500 mW in standby. Most off-the-shelf external power
adaptors can consume 300 mW when idling, leaving the system with only 200 mW available. In many systems
that require that almost everything be powered down in sleep mode after there is no more content to be played,
and then to be powered back up when signal enters the system again.
Energysense is designed to work in collaboration with a microcontroller to trigger interrupts notifying the
microcontroller to change the state of the PCM186x, and the rest of the board (for example, amplifiers, and so
on). The PCM186x does not automatically switch between sleep and wake modes.
Energysense is split into two functions: signal loss flag and signal resume flag. Both are available on the
PCM186x software-controlled devices. The PCM1860 and PCM1861 only support signal resume, as shown in
Table 17. By default, the signal resume threshold is set at –57 dBFS. Signal resume (autowakeup) only functions
when the device has been set to sleep.
Table 17. Energysense States
MODE
SLEEP
(Signal Detect
Mode)
PURPOSE
CONDITIONS
POSITIVE OUTCOME
WORST CASE
Detect Input Signal and Wake up
from SLEEP
BCK and LRCK stopped (not locked) or
register Set.
Host Wakes and services interrupt (reads
register)
Host Doesn't respond or start clocks.
Trigger Interrupt when input crosses
above (threshold)
Host Starts BCK/LRCK. (Moving system to
ACTIVE mode) or writes to register.
PCM186x keeps triggering interrupts until
host responds.
Trigger for 1ms every X seconds until
clocks start (x=1 by default)
ACTIVE
(Signal Loss
Mode)
Detect content below (threshold)
over time
BCK and LRCK are currently running
System can choose to go to sleep or not. If
not, reset interrupt
If system does not sleep, remain in Mode
2, and prompt every Y.
Assist system to sleep after
audio inactivity (for example,
Source is off, but speaker still
on)
If no content above -(threshold) dB for Y
minutes, drive interrupt.
If System decides to sleep, stop BCK/LRCK.
This will move PCM186x to SLEEP mode.
MCU will need to mask that interrupt.
9.3.11.1 Energysense Signal Loss Flag
The main ADC constantly monitors the input signal level while in ACTIVE mode. Should the input level remain
below a register defined threshold (for example –60 dB - Virtual Coefficient 0x2C, programmable through Page
1.) for a register defined amount of time (for example 1 minute - set by SIGDET_LOSS_TIME (Page.0, 0x33) ),
an interrupt can be generated.
If the system MCU decides to move to sleep mode, the PCM186x can be moved to SLEEP by stopping
BCK/LRCK or using PWRDN_CTRL (Page.0, 0x70); see Table 17 for details.
If BCK and LRCK are stopped by the host after the interrupt, the device goes to the sleep state as shown in
Figure 37. Otherwise, the interrupt continues for a few seconds, defined by SIGDET_INT_INTVL (Page.0, 0x36)
unless the interrupt and timeout counter is reset.
Stopped BCK and LRCK by the Host
Time of loss of signal
(Y minutes )
Sleep State
Threshold
Level
INT
1 ms
Figure 37. Energysense Signal Loss
50
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In a typical application, the host MCU will note and reset this register multiple times until a system sleep number
is hit. For example, a 5-minute signal loss could be implemented by using the default 1-minute timeout on the
PCM186x, and counting five interrupts. An example is shown in Figure 38.
Time of Loss of Signal (Y minutes)
Y minutes
1 ms
Y minutes
1 ms
1 ms
Figure 38. Interrupt Behavior for Signal Loss
Alternatively, the SIGDET_LOSS_TIME (Page.0, 0x33) register in the device can be changed from one minute
(default) to five minutes. This timeout is sample rate dependant. The expected sample rate is 48 kHz, but should
the system be running at 96 kHz, then the time will be halved. (192 kHz = quarter the register setting).
The duration of the interrupt can also be modified using INT_PLS (Page.0 0x62) to be pulses, or to be a sticky
flag, where sticky is defined as the interrupt is on until cleared.
9.3.11.2 Energysense Signal Detect Circuitry
In sleep mode (BCK and LRCK stop, or by register), the PCM186x monitors the signal level or dc level change
using the secondary ADC. All eight channels are converted one after the other in a circular manner. The scan
time is specified with register SIGDET_SCAN_TIME. All eight channels are measured, even if some have the
respective interrupt outputs muted. Accuracy and frequency response are a function of scan time. A long scan
time allows detection of lower frequency content. The energysense signal wakeup logic is shown Figure 39.
Scanning All Channels
1 ms
Interval Time (X sec )
Figure 39. Energysense Signal Wakeup Logic
There is a balance between lowest frequency detectable, and time on that particular channel. There are three
options in register SIGDET_INT_INTVL (Page.0 0x36):
• 50-Hz detect (160 ms per channel)
• 100-Hz detect (80 ms per channel)
• 200-Hz detect (40 ms per channel)
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9.3.11.2.1 Energysense Threshold Levels for Both Signal Loss and Signal Detect
There are two threshold levels used for Energysense, as shown in Figure 40. One is the loss of signal level,
another one is the resume of signal level.
RESUME Level
LOSS Level
Figure 40. Dual Thresholds for Energysense
As both thresholds are DSP based, their coefficients are stored in virtual coefficient space that is programmed
through the device register map.
For example, to change the resume threshold value to –30 dB (0x040C37):
Write 0x00 0x01 ; # change to register page 1
Write 0x02 0x2D ; # write the memory address of resume threshold
Write 0x04 0x04 ; # bit[23:15]
Write 0x05 0x0C ; # bit[15:8]
Write 0x06 0x37 ; # bit[7:0]
Write 0x01 0x01 ; # execute write operation
9.3.11.3 Programming Various Coefficients for Energysense
Programming the DSP coefficients for the energysense secondary ADC is done through the indirect virtual
programming registers in Page1. The low-pass filter (LPF) and high-pass filter (HPF) coefficients can be written
to flatten out the frequency response, as well as the energysense loss and resume thresholds. Visually, one can
imagine the DSP flow as shown in Figure 41.
DSP #1
Main ADC
Secondary
ADC
Decimation
Filter
DSP #2
Energysense
Loss-of-Signal Flag
HPF
Signal Resume of
Present Flag
LPF
HPF
Control Voltage
Change Flag
SGIDET_CH_Mode[7:0]
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Figure 41. Energysense Process Flow
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To flatten out the response of the secondary ADC, so that all frequencies are detected evenly, write the biquads
shown in Table 18 to the virtual DSP memory, using the techniques discussed in the Programming DSP
Coefficients on Software-Controlled Devices section.
Table 18. Secondary ADC Biquad Coefficients at 48kHz Sampling
COEFFICIENT
VIRTUAL RAM ADDRESS
LPF_B0
0x20
LPF_B1
0x21
LPF_B2
0x22
LPF_A1
0x23
LPF_A2
0x24
HPF_B0
0x25
HPF_B1
0x26
HPF_B2
0x27
HPF_A1
0x28
HPF_A2
0x29
9.3.12 Audio Processing
Both DSP1 and DSP2 are fixed function processors that are not custom-programmable. They are used in this
device to perform multiple filtering, mixing functions, signal detection and housekeeping functions. Programming
the DSP coefficients is done indirectly using registers on Page1. The data and target DSP memory address are
stored in registers, and once the DSPs are ready for the data (that is done by request) the data is then latched
into the DSP memory.
This indirect method of programming the DSP allows multiple registers to be written, without consuming valuable
register map space. More details can be found in the Programming DSP Coefficients on Software-Controlled
Devices section.
9.3.12.1 DSP1 Processing Features
9.3.12.1.1 Digital Decimation Filters
The main audio path uses a selectable decimation filter used to convert the high-data-rate modulator to I2S rates.
A choice between a classic FIR response and a low-latency IIR response is available. A high-pass filter, separate
from that used for the secondary ADC, is also available to remove any dc bias that may be present in the signal.
This feature is enabled by default.
Details can be found in the DSP_CTRL register (Page.0, 0x71).
9.3.12.1.2 Digital PGA
As discussed in the Programmable Gain Amplifier section, the digital PGA gain can be controlled by the auto
gain mapping function, that will use the analog gain settings in register PGA_VAL_CH1_L (Page.0 0x01) and
related registers to achieve the target gain with a combination of digital and analog gain. However, digital gain
can be also controlled directly by disabling the auto gain mapping function using register
PGA_CONTROL_MAPPING (Page.0 0x19). Manual update of digital PGA is only available in 4-channel devices
because the digital PGA gain is fixed to 0 dB when manual gain mapping is enabled.
9.3.12.2 DSP2 Processing Features
9.3.12.2.1 Digital Mixing Function
This function allows post ADC mixing, as well as ADC + incoming I2S mix. Volume control functionality can be
performed prior to outputting the signal to an I2S DAC or Amplifier.
Gain range is from –120 dB to +18 dB (4.20 format). Phase Inversion can be done by performing the two's
compliment of the positive gain coefficient. two's compliment can be performed by inverting all bits in the binary
coefficient, and adding 1 to the LSB.
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As the DSP coefficients are directly written, no soft ramping is available. Use of I2S receive sacrifices two digital
mic channels due to pin limitations.
Coefficients are written indirectly to virtual memory addresses using the registers on page 1. Details of the
registers are shown in the Register Maps section.
A diagram of the digital mixing functionality is shown in Figure 42.
MIX1_CH1L
Ch1[L]
ADC Outputs
MIX1_CH1R
Mute
Ch1[R]
MIX1_CH2L
Ch2[L]
MIX1_CH2R
Ch2[R]
MIX1_I2SL
SDIN
I2S[L]
MIX1_I2SR
I2S Tx1
DOUT1
I2S Tx2
DOUT2
I2S[R]
Ch1[L]
Ch1[R]
Mute
Ch2[L]
Mixer 2
Ch2[R]
I2S[L]
I2S[R]
Ch1[L]
Mute
Ch1[R]
Ch2[L]
Mixer 3
Ch2[R]
I2S[L]
I2S[R]
Ch1[L]
Ch1[R]
Mute
Ch2[L]
Mixer 4
Ch2[R]
I2S[L]
I2S[R]
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Figure 42. Digital Mixer Functionality
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9.3.13 Fade-In and Fade-Out Functions
The PCM186x has fade-in and fade-out functions on DOUT to avoid pop noise. This function is engaged on
device power up or down, and mute or unmute. The level changes from 0 dB to mute, or mute to 0 dB, are
performed using pseudo S-shaped characteristics calculation with zero-cross detection. Because of the zerocross detection, the time needed for the fade-in and fade-out depends upon the analog input frequency (fIN).
Fade takes 48 / fIN until processing is completed. If there is no zero cross during 8192 / fS, DOUT is faded in or
out by force during 48 /fS (TIME OUT). Figure 43 illustrates the fade-in and fade-out operation processing.
Fade-In Complete
Fade-Out Start
Fade-In Start
Fade-Out Complete
DOUT
BPZ
(Contents)
48/fin or 48/fS
48/fin or 48/fS
Figure 43. Fade-In and Fade-Out Operations
9.3.14 Mappable GPIO Pins
All the GPIO pins on thePCM186x software-controlled devices can be configured for various functions. They can
each have their polarity inverted to make control of following circuits easier. See the control registers for each
GPIO for a better explanation of mapping. (such as GPIO1_FUNC at Page.0 0x10)
The type of function can also be controlled, including such behavior as regular inputs, inputs with toggle
detection, or sticky bits. The device can also be configured as an open drain output, so that multiple interrupt
outputs from different devices in the system can be connected together.
9.3.15 Interrupt Controller
The hardware-controlled PCM1860 and PCM1861 has the energysense signal detect as the default output on
the INT pin. There are no other interrupt sources. The INT pin on the PCM1860 and PCM1861 is also used to
put the device into power-down mode. Figure 44 shows the interrupt logic
PCM186x
Software-Controlled Devices
Enable bits
Sticky Registers
Energysense
Pulse Duration
Polarity
DC Level Change
Interrupt
Generator
Polarity
Control
INT
Post PGA Clipping
Detection
DIN Toggle
Status
Clear Bits
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Figure 44. Interrupt Logic
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The software-controlled devices have multiple signals that can be mapped to the interrupt outputs. These
include:
• Energysense (default)
• Secondary ADC controlsense interrupt
• Post PGA clip
• DIN toggle
The Interrupt controller has the following features
• The Interrupt sources can be filtered by the enable register (INT_EN).
• The Interrupt flags can be monitored by reading the status register (INT_STAT).
• The interrupt flags can be cleared by writing the status register.
• The polarity of the interrupt signal can be changed between active high, active low and Open Collector (High
Impedance is pulled to GND) (INT_PLS).
• The pulse width of the interrupt signal can be changed between 1ms, 2ms, 3ms and 4ms.
• The interrupt controlled cannot remain asserted, the status bits can be sticky, but the interrupt pin itself has
no hold function.
Using a combination of these features, as well as the interrupt sources, allows the PCM186x to alert a host
microcontroller of an event, using whichever polarity signal required (pull high, pull low, Hi-Z open collector). The
host controller can then communicate with the device to poll the interrupt flag register to find out what happened.
Additional registers can then be read for more details. (For instance, which input triggered an energysense
event.). From a register point of view, there is no difference between INT A, INT B and INT C logic, other than
their signaling (positive, negative or open drain).
9.3.15.1 DIN Toggle Detection
DIN toggle can be used to trigger from an external PCM audio data source or any other digital data source (such
as a IR remote control UART stream) where there is a toggling logic state. (from 0 V to 3.3 V, or vice versa). All
GPIO pins support DIN toggle detection, other than GPIO2.
This function is only enabled in sleep mode.
9.3.15.2 Clearing Interrupts
Each Interrupt type has a specific method to clear. When clearing or resetting an interrupt, always remove the
source of the interrupt first.
9.3.15.2.1 Reset Energysense Loss (in Active Mode)
Background: In active mode, the threshold is set to a system-level defined loss threshold (for example, –80
dBFS), and the timeout set to 1 minute.
After 1 minute, the interrupt triggers. To reset energysense loss, take the following steps:
Step 1: Disable the interrupt in INT_EN (Page.0 0x60)
Step 2: Look at INT_STAT (Page.0 0x61). What is the energysense interrupt?
The interrupt status register INT_STAT (Page.0 0x61) is sticky in active mode. After being set, this register
cannot be reset without clearing SIGDET_STAT (Page.0 0x32).
Step 3 Option 1:The easiest way to clear the register is to move to sleep mode. PWRDN_CTRL (Page.0
0x70)
Step 3 Option 2: To ignore the interrupt, or to clear it and remain in active mode (and wait another minute)
Step 4: Set the signal loss threshold to –110 dB (so that the interrupt is no longer generated by internal logic)
Step 5: Clear the SIGDET_STAT (Page.0 0x32) register by:
Write 0xFF to SIGDET_STAT (Page.0 0x32)
Read SIGDET_STAT (Page.0 0x32). The register should be 0x00
Step 6: Now set signal loss threshold to the original –80 dBFS
Step 7: Enable the interrupt again INT_EN (Page.0 0x60)
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9.3.15.2.2 Reset Energysense Detect (In Sleep Mode)
Background: The device is in sleep mode, with the wake threshold set as a DSP memory coefficient.
INT_STAT (Page.0 0x61) is sticky and SIGDET_STAT (Page.0 0x32) is not sticky in this mode. The Interrupt
pin triggers dynamically as the audio crosses the threshold. The SIGDET_STAT (Page.0 0x32) register
shows which input is causing the input only while that particular input is causing the interrupt. The INT_STAT
(Page.0 0x61) register shows the energysense interrupt has been triggered until it is cleared.
The system host controller responds to the interrupt in one of two ways:
Option 1: Move to active mode. PWRDN_CTRL (Page.0 0x70)
Option 2: Ignore the interrupt in the system controller, or disable the interrupt for a set amount of time using
INT_EN (Page.0 0x60)
9.3.15.2.3 Reset Controlsense (Active and Sleep Modes)
If a potentiometer has been moved and the interrupt asserts, the following steps should be taken:
Step 1: Read the INT_STAT (Page.0 0x61) to confirm it is a controlsense event.
Step 2: Disable the controlsense interrupt temporarily: INT_EN (Page.0 0x60)
Step 3: Read the SIGDET_STAT (Page.0 0x32) to see which channel changed
Step 4: Read the appropriate SIGDET_DC_LEVEL_CHx_x to find the new value
Step 5: Copy the value to the appropriate SIGDET_DC_REF_CHx_x register. This action should stop the
interrupt being caused internally.
Step 6: Re-enable the Interrupt INT_EN (Page.0 0x60)
9.3.15.2.4 Reset DIN Toggle (In Sleep Mode)
Background: The DIN toggle mode can detect if there is a toggle on an external data pin. For The INT pin will
pulse as and when the Internal ADC flow clips. Despite the dynamic nature of the interrupt output pin, INT_STAT
(Page.0 0x61) is a sticky register. To clear this register, take the following steps:
Step 1: Read the INT_STAT (Page.0 0x61) to confirm it is a PGA clipping event.
Step 2: Lower the gain of the current input channel INT_EN (Page.0 0x60)
Step 3: Reset the interrupt using INT_EN (Page.0 0x60). Set bit 5 to 0, then back to 1
Step 4: Bit 5 of INT_STAT (Page.0 0x61) should now be 0. If not, go to step 2 again.
9.3.15.2.5 Reset PGA Clipping (Active)
Background: PGA Clipping is a dynamic interrupt. The INT pin will pulse as and when the Internal ADC flow
clips. Despite the dynamic nature of the interrupt output pin, INT_STAT (Page.0 0x61) is a sticky register. To
clear this register, take the following steps:
Step 1: Read the INT_STAT (Page.0 0x61) to confirm it is a PGA clipping event.
Step 2: Lower the gain of the current input channel INT_EN (Page.0 0x60)
Step 3: Reset the interrupt using INT_EN (Page.0 0x60). Set bit 5 to 0, then back to 1.
Step 4: Bit 5 of INT_STAT (Page.0 0x61) should now be 0. If not, go to step 2 again.
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9.3.16 Audio Format Selection and Timing Details
9.3.16.1 Audio Format Selection
Format selection for the PCM1860 and PCM1861 is controlled using a hardware pin configuration. There is a
choice of left-justified data (known as LJ) or I2S.
On the PCM186x software-controlled devices, format selection is done with the registers in I2S_FMT (Page.0
0x0B), which offers additional support for right-justified (RJ) and time division multiplexed (TDM) data for multiple
channels.
The PCM186x software-controlled devices also offer an additional DOUT pin that can be driven through the
GPIO pins. For an example, see the register details at GPIO1_FUNC (Page.0 0x10).
9.3.16.2 Serial Audio Interface Timing Details
2
FORMAT 0: FMT = Low = 24-Bit, MSB-First, I S
LRCK
Left-Channel
Right-Channel
BCK
DOUT
1
2
3
22 23 24
MSB
1
LSB
2
3
22 23 24
MSB
LSB
FORMAT 1: FMT = High = 24-Bit, MSB-First, Left-Justified
Left-Channel
LRCK
Right-Channel
BCK
DOUT
1
2
3
MSB
22 23 24
LSB
1
2
3
22 23 24
MSB
1
LSB
Figure 45. Audio Data Format
(LRCK and BCK Work as Inputs in Slave Mode and as Outputs in Master Mode)
9.3.16.3 Digital Audio Output 2 Configuration
The PCM186x four-channel software-controlled devices offer an additional DOUT through the use of a GPIO that
has its rate synchronized with the primary DOUT. DOUT2 is configured using the digital mixer, shown in Digital
Mixing Function. In TDM Modes, DOUT2 is not available.
The GPIO used for DOUT2 can be set using registers. GPIO0 is used for SPI-MOSI in SPI mode, however, it
can be retasked for DOUT2 duties if MOSI is not required.GPIO0_FUNC (Page.0 0x10), GPIO1_FUNC (Page.0
0x10), GPIO2_FUNC (Page.0 0x11), or GPIO3_FUNC (Page.0 0x11) can be used to set GPIOx to DOUT2
9.3.16.4 Time Division Multiplex (TDM Support)
The software-controlled devices can support TDM for both slave and master modes. In many devices, this is also
known as DSP Mode.
Data on the TDM stream can be between two and four channels of audio content from each PCM186x mixer
output. By default, each mixer passes data from the respective ADC in a bypass or passthrough configuration.
Data from the secondary ADC can also be output on channels five and six. The frame rate in TDM mode fixed to
256 BCK per frame, and the duty cycle of the LRCK (or frame sync signal) can be either a 50 / 50 duty cycle, or
a single bit at the start of the frame.
Up to 32 bits per channel are available. In 32-bit mode, 24 bits of data and 8 bits of padding (zero) are used per
channel. In 24-, 20-, and 16-bit data, no padding is provided between channels. In 24-bit mode, channel two
begins transmitting on bit clock 25.
In data formats lower than 24 bits, the data is simply truncated, not dithered to 16 bits.
In slave mode, only a rising edge on the first bit is required to start the frame. (similar to MSB-first, left-justified).
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In master mode, only a 50% duty cycle on the output is possible. This configuration is made by setting
TDM_LRCK_MODE (Page.0 0x0B) to 0.
Typically when interfacing to a DSP, only the rising edge on the first bit of data of the frame is required.
While the device is not transmitting data (but still being clocked), the DOUT pin will be Hi-Z (high impedance) to
allow other devices on the bus to transmit their data.
TDM mode is configured using I2S_FMT (Page.0 0x0B), TDM_LRCK_MODE (Page.0 0x0B), TDM_OSEL
(Page.0 0x0C)
The timing limits for the interface signals are defined by the Serial Audio Data Interface Configuration section
with the addition that the BCK period minimum must be at least 1 / (512 × fS) to make sure that data is clocked in
correctly.
The audio format is shown in Figure 46. The 24-bit data can fit up to 10 channels of data in a 256x bitclock
stream; however, the I2C-controlled devices only have two possible I2C addresses. The eight channels of audio
data should be no issue.
BCK (fixed at 256 × fS)
Example
24-Bit
TDM Mode
LRCK / Frame Sync
50% Duty Cycle (Master Mode)
LRCK / Frame Sync
DATA
24-Bit
No Gaps
1BCK or 50% Duty Cycle (Slave Mode)
Ch1 data
(24 bits)
Ch2 data
(24 bits)
Ch3 data
(24 bits)
Ch4 data
(24 bits)
Ch5 data
(24 bits)
Ch6 data
(24 bits)
Ch7 data
(24 bits)
Ch8 data
(24 bits)
Ch9 data
(24 bits)
BCK (fixed at 256 × fS)
Example
32-Bit
Mode
LRCK / Frame Sync
LRCK / Frame Sync
24-Bit
DATA 8-Bit Gaps
xx xx xx
xx xx xx
xx
xx
Ch10 data EMPTY
(24 bits) (16 bits)
Ch1 data
(24 bits)
50% Duty Cycle (Master Mode)
1BCK or 50% Duty Cycle (Slave Mode)
Ch1 data 8 Ch2 data 8 Ch3 data 8 Ch4 data 8 Ch5 data 8 Ch6 data 8 Ch7 data 8 Ch8 data 8
(24 bits) bits (24 bits) bits (24 bits) bits (24 bits) bits (24 bits) bits (24 bits) bits (24 bits) bits (24 bits) bits
x
x
x
x
x
x
x
Figure 46. Audio Format for TDM
x
x
x
NOTE
TDM mode can only function up to 96 kHz sampling rate when IOVDD is 1.8 V. This is
due to an I/O limitation of 25 MHz at 1.8 V.
9.3.16.5 Decimation Filter Select
The PCM186x offers a choice of two different digital filters, a Classic FIR response and a low latency IIR.
9.3.16.6 Serial Audio Data Interface Configuration
The PCM186x devices interface to the audio system through LRCK, BCK and DOUT.
The PCM186x hardware-controlled devices are configured using pin MD4 to select between left-justified data and
I2S.
The PCM186x software-controlled devices are configured using register I2S_FMT (Page.0 0x0B). Use register
I2S_TX_OFFSET (Page.0 0x0D) when dealing with TDM systems to offset the data transmit.
In addition, the offset required for receiving 24-bit data is programmed using RX_TDM_OFFSET (P0, R0x0E).
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9.4 Device Functional Modes
9.4.1 Power Mode Descriptions
The PCM186x family has multiple power modes: active, sleep, idle, and standby. Table 19 lists the power modes
and functions.
• Active mode: describes the mode where the device is targeting full performance and functionality.
• Idle mode: describes the mode where the digital output is muted and the analog side (such as PGAs) are still
powered up.
• Sleep mode: describes the mode where the main ADCs are not in use, but the device continues to do
Energysense input level detection.
• Standby mode: drops the power into an ultra-low power mode where only the control port is available.
Table 19. Power Modes
ACTIVE OR IDLE
(MUTE)
SLEEP (Energysense)
STANDBY
Programmable Gain
Amps
ON
OFF
OFF
FUNCTIONS
ANALOG FUNCTIONS
ADC
ON
OFF
OFF
ADC Reference
ON
OFF
OFF
ON
CMBF
ON
ON
Reference
ON
ON
ON
Mic Bias
ON
ON
OFF
Secondary ADC PGA
ON
ON
OFF
Secondary PGA
ON
ON
OFF
ACCESSORY FUNCTIONS
LDO
ON
ON
ON
Oscillator
ON
ON
ON
Clock Halt Detection
ON
ON
ON
PLL
ON
ON
OFF
Digital Cores
ON
20% ON
5% ON (Control Port
Only)
9.4.1.1 PCM1860 and PCM1861 Hardware Device Power Down Functions
9.4.1.1.1 Enter Standby Mode (From Active Mode)
The external host should drive the INT pin (GPIO3) high (whilst there is no interrupt pending) to place the device
in Idle mode.
The INT pin is configured as an energysense interrupt output on the hardware-controlled device; therefore, the
external host microcontroller should use it as multi-function pin. (MCU pin configured as INPUT when no
requirement exists to move to standby, MCU pin as OUTPUT driving HIGH when a need exists to place the
device in an idle state.)
NOTE
While the device is driving its interrupt high, any external voltage on the INT pin will be
ignored by the device, until the interrupt event (and pulse) is finished.
9.4.1.1.2 Exit From Standby Mode Back to Active
The external MCU host releases the INT pin (GPIO3). This typically involves reconfiguring the external MCU
GPIO into an INPUT or HI-Z.
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9.4.1.1.3 Enter or Exit Sleep or Energysense Mode to Active
Enter sleep mode: Halt BCK and LRCK
Exit sleep mode: Resume BCK and LRCK
9.4.1.2 PCM186x Software Device Power Down Functions
9.4.1.2.1 Enter or Exit Stand-by Mode
Enter standby mode: Send power down command by writing register PWRDN_CTRL (Page.0 0x70)
Exit standby mode: Send power up command by writing register PWRDN_CTRL (Page.0 0x70)
9.4.1.2.2 Enter Sleep Mode
Send sleep command by writing register PWRDN_CTRL (Page.0 0x70) or
Halt BCK and LRCK when I2S is configured as I2S slave mode
9.4.1.2.3 Exit Sleep Mode
Send resume from (exit) sleep command by writing register PWRDN_CTRL (Page.0 0x70) or
Resume BCK and LRCK when I2S is configured as I2S slave mode
9.4.1.3 Bypassing the Internal LDO to Reduce Power Consumption
The PCM186x has an integrated LDO allowing single 3.3-V supply operation. However, developers desiring to
minimize power consumption can bypass the on-chip LDO and provide 1.8 V to IOVDD and to LDO under the
following conditions:
• TDM mode is limited to BCK driving a maximum of 25 MHz, because the BCK and DATA cells cannot exceed
25 MHz when IOVDD is 1.8 V. Consequently, a maximum of 96-kHz sampling frequency operation is
possible.
• IOVDD MUST be 1.8 V along with LDO, if an external 1.8 V supply is used to bypass the internal LDO.
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9.5 Programming
9.5.1 Control
9.5.1.1 Hardware Control Configuration
PCM186x devices require the following functions to be configured on startup. Hardware-controlled devices
require a subset of these configurations:
• Control interface type and address for PCM186x software-controlled devices
• The clock mode and rate (automatic in slave mode, or divider ratio in master mode) for hardware-controlled
devices. For more details see the Clocks section.
• The interface audio data format for hardware-controlled devices.
• Digital filter selection (FIR or IIR) for hardware-controlled devices; requires a power cycle to change.
• Analog input channels and PGA gain for hardware-controlled devices.
9.5.1.2 Software-Controlled Device Configuration
PCM186x software-controlled devices are configured and controlled by using either I2C or SPI using MD0 and
MD1. Table 20 shows the MD0 control protocols, and Table 21 shows the MD1 mode selection.
Table 20. MD0: Control Protocol Select
MD0
Control Protocol
Low (or floating)
I2C Mode
High
SPI Mode
Table 21. MD1: I2C Address or SPI Chip Select
MODE
MD1 USE
STATIC MD1 VALUE
CONFIGURATION
I2C
Address pin
Low
I2C Address: 0x94
2
I C
Address pin
High
I2C Address: 0x96
SPI
MS (SPI Chip Select)
N/A
N/A
9.5.1.3 SPI Interface
The SPI interface is a 4-wire synchronous serial port that operates asynchronously to the serial audio interface
and the system clock (SCK). The serial control interface is used to program and read the on-chip mode registers.
The control interface includes MISO, MOSI, MC, and MS. MISO (master in slave out) is the serial data output,
used to read back the values of the mode registers; MOSI (master out slave in) is the serial data input, used to
program the mode registers.
MC is the serial bit clock, used to shift data in and out of the control port on the MC falling edge. MS is the
active-low mode control enable, used to enable the internal mode register access. If data from the device is not
required, the MISO pin can be assigned to GPIO1 by register control.
9.5.1.3.1 Register Read and Write Operation
All read and write operations for the serial control port use 16-bit data words. Figure 47 shows the control data
word format. The most significant bit is the read and write (R/W) bit. For write operations, the bit must be set to 0.
For read operations, the bit must be set to 1. There are seven bits, labeled IDX[6:0], that hold the register index
(or address) for the read and write operations. The least significant eight bits, D[7:0], contain the data to be
written to, or the data that was read from, the register specified by IDX[6:0].
Figure 48 and Figure 49 show the functional timing diagram for writing or reading through the serial control port.
MS should be held at logic 1 state until a register needs to be written or read. To start the register write or read
cycle, MS should be set to logic 0. Sixteen clocks are then provided on MC, corresponding to the 16 bits of the
control data word on MOSI and readback data on MISO. After the eighth clock cycle has completed, the data
from the indexed-mode control register appears on MISO during the read operation. After the sixteenth clock
cycle has completed, the data is latched into the indexed-mode control register during the write operation. To
write or read subsequent data, MS should be set to logic 1 once.
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MSB
IDX6
LSB
IDX5 IDX4
IDX3 IDX2
IDX1 IDX0 R/W
D7
Register Index (or Address)
D6
D5
D4
D3
D2
D1
D0
Register Data
NOTE: B8 is used for selection of write or read. Setting = 0 indicates a write, while = 1 indicates a read. Bits 15–9 are used
for register address. Bits 7–0 are used for register data.
Figure 47. Control Data Word Format for MDI
MS
MC
MOSI
A6 A5 A4 A3 A2 A1 A0 W
D7 D6 D5 D4 D3 D2 D1 D0
HI-z
MISO
Figure 48. Serial Control Format for Write
MS
MC
MOSI
A6 A5 A4 A3 A2 A1 A0
HI-z
MISO
R
D7 D6 D5 D4 D3 D2 D1 D0
HI-z
D7 D6 D5 D4 D3 D2 D1 D0
Figure 49. Serial Control Format for Read
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9.5.1.4 I2C Interface
The PCM186x software-controlled devices support the I2C serial bus and the data transmission protocol for
standard and fast mode as a slave device. This protocol is explained in I2C specification 2.0.
The I2C control port is available even in the absence of any other clocks in the system.
In I2C mode, the control pins are changed as shown in Table 22.
Table 22. I2C Pins and Functions
PIN NAME
PIN NUMBER
PROPERTY
DESCRIPTION
SDA
23
Input / Output
I2C data
SCL
24
Input
AD
25
I2C clock
2
Input
I C address 1
9.5.1.4.1 Slave Address
The PCM186x software-controlled devices have a 7-bit slave address, as shown in Table 23. The first six bits
(MSBs) of the slave address are factory preset to 1001 01. The next bit of the address byte is the device select
bit, which can be user-defined by the AD pin. A maximum of two PCM186x devices can be connected on the
same bus at one time. Each device responds when receiving the respective slave address.
Table 23. I2C Slave Address
MSB
LSB
1
0
0
1
0
1
AD
R/W
9.5.1.4.2 Packet Protocol
A master device must control packet protocol, which consists of start condition, slave address, read/write bit,
data if write or acknowledge if read, and stop condition. The PCM186x software-controlled devices support only
slave receivers and slave transmitters. Figure 50 shows the basic I2C framework.
SDA
SCL
St
1–7
Slave address
8
R/W
9
ACK
1–8
DATA
9
ACK
1–8
DATA
9
ACK
9
ACK
R/W: Read operation if 1;otherwise,write operation
ACK: Acknowledgement of a byte if 0
DATA: 8 bits (byte)
Start
condition
Sp
Stop
condition
write operation
Transmitter
Data Type
M
St
M
slave
address
M
R/W
S
ACK
M
DATA
S
ACK
M
DATA
S
ACK
------------
S
ACK
M
Sp
M
St
M
slave
address
M
R/W
S
ACK
M
DATA
S
ACK
M
DATA
S
ACK
------------
S
ACK
M
Sp
read operation
Transmitter
Data Type
M: Master Device MMM S: Slave Device
St: Start Condition MMM Sp: Stop Conditiion
Figure 50. Basic I2C Framework
9.5.2 Current Status Registers
Page.0, registers 0x72 through 0x75 and 0x78 can be used to read the device status at any time. Sample rate,
power rail status, clock error, and clock ratios can all be read from these registers.
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9.5.3 Real World Software Configuration using Energysense and Controlsense
To gain the benefit of many of the PCM186x features, use a microcontroller to monitor and control the device.
There are two main modes withing the device, Active and Sleep. Using a microcontroller to process the interrupts
for both energysense and controlsense allows the system to intelligently wake and sleep as well as update
system controls. Figure 51 and Figure 52 show flow diagrams for both active and sleep modes, respectively.
Extended I2C register settings are shown in Bold Text.
9.5.3.1 Active Mode Flow Diagram
PowerUp
Basic Device
Configuration
Stable System
Running in Active Mode
Manually (0x0A)
cycle for secondary
ADC source
(control pot)
No Interrupt
Interrupt!
Energysense Signal Loss
Ignore and Wait Longer
Move to Sleep or wait
for another length of
time?
Clear E-Sense
Interrupt
INT_STAT
(0x61)
ControlSense
Sleep
Update System
Refresh Pot Value
Reset Ref Level
Move to Sleep Mode
(0x70)
Figure 51. Active Mode Flow Chart
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9.5.3.2 Basic Device Configuration
The device by default starts in slave mode at 48 kHz (per the EVM)
Set global loss level to be –50 dB using the DSP coefficient method.
Set 4R as controlsense input (for example, a control voltage for volume control) using SIGDET_CH_MODE
(0x30)
Configure active mode secondary to be channel 4R using SEC_ADC_INPUT_SEL (0x0A)
Set Read Data without latch in register AUXADC_DATA_CTRL (0x58)
Set interrupts (energysense and controlsense) using INT_EN (0x60)
Set interrupt pulse for 3 mS (makes it easier to see it visually using INT_PLS (0x62)
9.5.3.3 Clear Energysense Interrupt
Disable the energysense interrupt in INT_STAT register (0x61)
Remove the interrupt source by changing the loss detect threshold to 110 dB (ADC noise level) using the DSP
coefficient method.
Write 0xFF to the SIGDET_STAT (0x32) register.
Write 0x00 to the SIGDET_STAT (0x32) register.
Change the loss detect threshold back to –50 dB using the DSP coefficient method.
Re-enable the energysense interrupt in INT_STAT register (0x61)
9.5.3.4 Update System Settings
Read interrupt status INT_STAT register(0x61)
Clear interrupt enable INT_EN (0x60)
Check which input caused the interrupt; in this case, looking for (4R) SIGDET_STAT (0x32)
Read new 4R data (for example, SIGDET_DC_LEVEL_CH4_R 0x57).
Host would normally process as needed. (foe example, change volume in the amplifier)
Set SIGDET_DC_REF_CH4_R (0x55) to be the new value.
Now that interrupt source is removed, we can clear the SIGDET_STAT register (0x32)
Write 0xFF to SIGDET_STAT register (0x32).
Write 0x00 to SIGDET_STAT register (0x32).
Re-enable control Sense Interrupt in INT_EN (0x60)
9.5.3.5 Sleep Mode Flow Diagram
The sleep mode flow chart is shown in Figure 52.
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Sleep Mode Start
No Interrupt
Interrupt!
Energysense
Audio Detect
INT_STAT
(0x61)
ControlSense
Update System
Disable Interrupt
Refresh Pot Value
Update System
Reset Ref Level
Re-enable Interrupt
Disable Interrupt
(0x60)
Read SIGDET_STAT
(0x32)
Change Primary
Audio Inputs?
WAKE?
(0x70)
WAKE (0x70)
No
Yes
Figure 52. Sleep Mode Flow Chart
9.5.3.6 Update Controlsense values in Sleep Mode
9.5.3.6.1 Update System Settings
In sleep mode, any channels set as controlsense inputs are scanned through automatically. The read and writes
to SIGDET_DC_REF_CHx_x and SIGDET_DC_LEVEL_CHx_x should be selected based on whichever input
caused the interrupt.
Read interrupt status INT_STAT register(0x61)
Clear controlsense interrupt enable INT_EN (0x60)
Check which input caused the interrupt SIGDET_STAT (0x32)
Read new data (for example, SIGDET_DC_LEVEL_CHx_x).
Host would normally process as needed (for example, change volume in the amplifier)
Set SIGDET_DC_REF_CHx_x to be the new value.
Now that interrupt source is removed, we can clear the SIGDET_STAT register (0x32) -Write 0xFF to SIGDET_STAT register (0x32).
Write 0x00 to SIGDET_STAT register (0x32).
Re-enable controlsense interrupt in INT_EN (0x60)
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9.5.4
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Programming and Register Reference
9.5.4.1 Coefficient Data Formats
All mixer gain coefficients are 24-bit coefficients using a 4.20 number format. Numbers formatted as 4.20
numbers have 4 bits to the left of the binary point and 20 bits to the right of the binary point.
The most significant bit of the 4.20 number format is the sine bit. It is used, as part of a two's complement
number to invert the phase of that mixer input.
See SLAC663 for a calculator to convert from dB to the hexadecimal coefficient required.
9.5.5 Programming DSP Coefficients on Software-Controlled Devices
The two fixed function DSPs on chip can have coefficients for filters and mixers programmed to them. This is
done indirectly using specific registers on page 1. The devices integrate a memory arbiter that copies the
coefficient from the I2C or SPI register space to the appropriate DSP memory address, when the DSP has
completed its instructions for that sample. The refresh mechanism for the memory arbiter to update the I2C or
SPI register space requires two dummy I2C writes to move from the DSP internal memory, through the arbiter
and onwards to be visible in the I2C or SPI register space. See Figure 53
Refresh Status
Clocked by I2C Write
I2C and SPI
Register Space
Memory Arbiter
DSP Internal Memory
Figure 53. Register to DSP Memory Structure
Each 24-bit coefficient can be written once every audio sample. This allows a single sample update of a mixer
coefficient, however, biquad coefficients will require multiple audio samples for all of the coefficients to be written.
Under such conditions, the device should be muted until all coefficients are written. Otherwise, the biquad could
become unstable.
In addition, DSP Internal memory can only be written to when the DSP is provided a clock from either the PLL or
an external master clock source. Requesting a WREQ = 1 Register 0x01 of page 0x01 will have no effect, if the
DSP is not currently running. This is of relevance if the system is running as a clock slave, and the clocks stop.
For example, to write to these registers, change the energysense resume threshold value to –30 dB (0x040C37)
1. Write 0x00 0x01 ; # change to register bank 1
2. Write 0x00 0x01 ; # two dummy writes to update the status of the write busy bit
3. Write 0x00 0x01 ; # ^^^^
4. Read Register 0x01 # if value is 0x00 then continue (check if system is still writing/reading). Otherwise, do
another dummy write and check again.
5. Write 0x02 0x2D ; # write the memory address of resume threshold
6. Write 0x04 0x04 ; # bit[23:15]
7. Write 0x05 0x0C ; # bit[15:8]
8. Write 0x06 0x37 ; # bit[7:0]
9. Write 0x01 0x01 ; # execute write operation
See SLAC663 for more details.
The internal DSP coefficient memory space is mapped as shown in Table 24.
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Table 24. Virtual 24-Bit DSP Coefficient Registers
NAME
Mixer-1
Mixer-2
Mixer-3
Mixer-4
Secondary ADC LPF and HPF
Coefficients
Energysense
COEFFICIENT
ADDRESS
MIX1_CH1L
0x00
MIX1_CH1R
0x01
MIX1_CH2L
0x02
MIX1_CH2R
0x03
MIX1_I2SL
0x04
MIX1_I2SR
0x05
MIX2_CH1L
0x06
MIX2_CH1R
0x07
MIX2_CH2L
0x08
MIX2_CH2R
0x09
MIX2_I2SL
0x0A
MIX2_I2SR
0x0B
MIX3_CH1L
0x0C
MIX3_CH1R
0x0D
MIX3_CH2L
0x0E
MIX3_CH2R
0x0F
MIX3_I2SL
0x10
MIX3_I2SR
0x11
MIX4_CH1L
0x12
MIX4_CH1R
0x13
MIX4_CH2L
0x14
MIX4_CH2R
0x15
MIX4_I2SL
0x16
MIX4_I2SR
0x17
LPF_B0
0x20
LPF_B1
0x21
LPF_B2
0x22
LPF_A1
0x23
LPF_A2
0x24
HPF_B0
0x25
HPF_B1
0x26
HPF_B2
0x27
HPF_A1
0x28
HPF_A2
0x29
Loss_threshold
0x2C
Resume_threshold
0x2D
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DESCRIPTION
4.20 format
4.20 format
4.20 format
4.20 format
1.23 format
1.23 format
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10 Application and Implementation
NOTE
Information in the following applications sections is not part of the TI component
specification, and TI does not warrant its accuracy or completeness. TI’s customers are
responsible for determining suitability of components for their purposes. Customers should
validate and test their design implementation to confirm system functionality.
The PCM186x family is extremely flexible, and this flexibility gives rise to a number of design questions that
define the design requirements for a given application.
10.1 Application Information
In this section, the design choices are described, followed by a typical system implementation. The simplified
application diagrams shown in Figure 64 and Figure 66 illustrate a typical system that would require the following
architecture decisions to be made:
• Device Control Method
– Hardware Control (PCM1860, PCM1861)
– Software Control (PCM1862, PCM1863, PCM1864 and PCM1865)
– SPI
– I2C
• Power-Supply Options
– Single supply
– Separate analog and digital supplies
– Separate IO supply
• Master Clock Source
– External CMOS-level clock
– External crystal with integrated oscillator
• Analog Input Configuration
– Single-ended
– Differential
An example application diagram is shown in Figure 54.
IN
MIC
DOUT
PCM186x
BCK
DOUT
TMS320C5535
PCM5121
TPA3116
LRCK
SW mix
IN
LINE
BCK
PCM5100
TPA3116
IN
USB
LRCK
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Figure 54. Example Application Diagram
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Application Information (continued)
10.1.1 Device Control Method
10.1.1.1 Hardware Control
The PCM1860 and PCM1861 are controlled with pullup or pulldown voltages on pins MD0 through MD6. The INT
pin is ideally designed to be used with a microcontroller that can treat the pin as both an input (when used as an
interrupt) and as an output to pull the pin high, and force power down. See the Pin Configuration and Functions
for the PCM1860 and PCM1861 for specific configuration details. The hardware control interface is shown in
Figure 55.
MD0 26
Sample Rate and
Master/Slave Selection
MD1 25
MD4 24
Digital Audio Format Selection
MD3I 23
Filter Mode Selection
MD2 22
MD5 21
Interrupt and Gain Selection
MD6 20
INT 19
Interrupt
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Figure 55. PCM1860 and PCM1861 Hardware Control Interface
10.1.1.2 Software Control
10.1.1.2.1 SPI Control
SPI control is selected by the MD0 pin; in this case, MDO connects to 3.3 V, so that the device acts as an SPI
slave. The SPI control interface is shown in Figure 56.
MD0 26
3.3 V SPI Select
MS 25
MC 24
SPI
MOSI 23
MISO 22
GPIO1/INTA/DMIN 21
Interrupt / GPIO
GPIO2/INTB/DMCLK 20
Interrupt / GPIO
GPIO3/INTC 19
Interrupt / GPIO
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Figure 56. SPI Control Interface Including Interrupt Signals
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Application Information (continued)
10.1.1.2.2 I2C Control
I2C control is selected by the MD0 pin; in this example, MDO is pulled down to ground, so that the device acts as
an I2C slave. One address line is supported to select between two devices on the same bus. The I2C control
interface is shown in Figure 57.
I2C Select
MD0 26
GND
I2C Address Select
AD 25
SCL 24
I2C Bus
SDA 23
GPIO1/INTA/DMIN 21
Interrupt / GPIO
GPIO2/INTB/DMCLK 20
Interrupt / GPIO
GPIO3/INTC 19
Interrupt / GPIO
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Figure 57. I2C Control Interface Including Interrupt Signals
10.1.2 Power-Supply Options
10.1.2.1 3.3-V AVDD, DVDD, and IOVDD
The 3.3-V AVDD, DVDD, and IOVDD Example is the most typical power-supply configuration. The 3.3-V single
supply is shown in Figure 58.
8
AVDD
13 DVDD
14 IOVDD
10 …F
2.2 …F
11 LDO
GND
2.2 …F
6
VREF
12 DGND
7
AGND
GND
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Figure 58. Single 3.3-V Supply
10.1.2.2 3.3-V AVDD, DVDD, and 1.8-V IOVDD
For details regarding lower-power applications, see 3.3-V AVDD, DVDD With 1.8-V IOVDD Example for LowerPower Applications for lower-power applications.
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Application Information (continued)
10.1.3 Master Clock Source
The PCM186x family offers three different clock sources. For the highest performance, run the ADC in master
mode from a stable, well-known SCK source, such as a CMOS SCK, or a external crystal (XTAL). The PCM186x
is easy to hook up to a crystal, simply connect to XI and XO, and add capacitors to ground, as suggested in the
XTAL manufacturer's data sheet (typically 15 pF).
External CMOS clock sources can be brought directly into the SCKI pin (for 3.3-V sources) or into the XI pin (1.8
V sources).
The PLL must be enabled if the clock source is unrelated to the audio rate. For instance, a 12-MHz USB crystal
requires custom PLL settings to generate the 48-kHz rate clocks and the 44.1-kHz rate clocks required by many
audio systems. An example with a 12-MHz clock is shown in Software-Controlled Devices Manual PLL
Calculation.
For timing limits on XTAL and SCKI, see the Specifications section.
10.1.4 Dual PCM186x TDM Functionality
Two PCM186x software-controlled devices can be used together to create an 8-channel (or higher) channel
count system using a TDM. In Figure 59, Device A is used as the TDM clock master, and Device B is configured
to be a TDM slave and transmit on channels 5, 6, 7, and 8 of the TDM stream. The key difference is that Device
A most likely has a crystal, or an SCKI source, and is configured to be the TDM master, whereas Device B does
not require an XTAL or SCKI source because Device B uses the internal PLL to generate the required system
clocks. Another two channels can be added to the stream from a stereo device; however, I2C address
management is required because the PCM186x software-controlled devices can only have one of two I2C
addresses.
CH1, CH2, CH3, CH4
CH5, CH6, CH7, CH8
DATA
LRCK
BCK
DSP Processor
PCM186x #1
(TDM Master)
PCM186x #2
(TDM Slave)
SDA
SCL
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Figure 59. TDM With Two PCM186x
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Application Information (continued)
10.1.5 Analog Input Configuration
10.1.5.1 Analog Front-End Circuit For Single-Ended, Line-In Applications
Most systems can simply use an input filter similar to the one shown in Figure 60. However, for systems with
significant out-of-band noise, a simple filter such as that shown in Figure 61 can be used for pre-ADC,
antialiasing filtering. The recommended resistor value for the antialiasing filter is 100 Ω. Place film-type
capacitors of 0.01 µF as close as possible to the VINLx and VINRx pins, and terminate to GND as close as
possible to the AGND pin in order to maximize the dynamic performance of the ADC.
Adding this filter resistor also adds some input current limiting into the device, if the ESD diodes begin to clamp
the signal when the maximum input voltage is exceeded. Keep the current through the input ESD diodes as low
as possible, with ~5 mA treated as a absolute maximum. Any higher and the ESD diodes may fail because of the
thermal constraints.
Single-Ended
Audio Source
10 µF
10 µF
Single-Ended
Audio Source
VINxx
100
VINxx
0.01 µF
PCM186x
PCM186x
Copyright © 2017, Texas Instruments Incorporated
Figure 60. Analog Input Circuit for Single-Ended
Input Applications
Copyright © 2017, Texas Instruments Incorporated
Figure 61. Analog Input Circuit With Additional
Anti Aliasing Filter for Single-Ended Applications
10.1.5.2 Analog Front-End Circuit for Differential, Line-In Applications
As in single-ended applications, most systems can simply use an input filter similar to Figure 62. However, for
systems with significant out-of-band noise, a simple filter such as that shown in Figure 63 can be used for preADC, antialiasing filtering. The recommended resistor value for the antialiasing filter is 47 Ω. Place film-type
capacitors of 0.01 µF as close as possible to the VINLx and VINRx pins, and terminate to GND as close as
possible to the AGND pin in order to maximize the dynamic performance of ADC. To maintain common-mode
rejection, match the series resistors as closely as possible.
Differential +
Audio Source
10 µF
Differential +
Audio Source
VINxP
10 µF
47
VINxP
0.01 µF
Differential Audio Source
VINxM
PCM186x
10 µF
Copyright © 2017, Texas Instruments Incorporated
Figure 62. Analog Input Circuit for Differential
Input Applications
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Differential Audio Source
VINxM
10 µF
47
PCM186x
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Figure 63. Differential Input Circuit With
Additional AntiAliasing Filter
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10.2 Typical Applications
10.2.1 Stereo Recording Application for PCM186x Hardware-Controlled Devices in Master Mode
3.3 V
2.2 k
2.2 k
Stereo
Pair 2
10 …F
Right Mic
10 …F
Stereo
Pair 1
Stereo
Pair 3
Left Mic
Stereo
Pair 4
15 pF
1 VINL2/VIN1M
Mic Bias
3.3 V
5
0.1 …F
2 VINR2/VIN2M
IOVDD 14
3 VINL1/VIN1P
DVDD 13
4 VINR1/VIN2P
AVDD
10 …F
0.1 …F
8
30 VINR3/VIN3P
MD0 26
29 VINL3/VIN4P
MD1 25
28 VINR4/VIN3M
MD3 23
Filter Mode Selection
27 VINL4/VIN4M
MD4 22
Digital Audio Format Selection
9 XO
10 …F
Sample Rate or Master/Slave
Selection
MD2 24
10 XI
MD5 21
11 LDO
MD6 20
Input and Gain Selection
15 pF
2.2 …F
2.2 …F
6 VREF
INT 19
7 AGND
DOUT 18
12 DGND
BCK 17
15 SCKI
PCM1860
PCM1861
System
Processor
LRCK 16
Copyright © 2017, Texas Instruments Incorporated
NOTE: Pins not shown in specific order.
Figure 64. Stereo Recording Application for PCM186x Hardware-Controlled Devices in Master Mode
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Typical Applications (continued)
10.2.1.1 Design Requirements
• Device control method: Hardware control by digital GPIO pins of a microcontroller
• XTAL used for master mode
• Single-ended analog inputs
10.2.1.2 Detailed Design Procedure
• Device control method: Hardware control by digital GPIO pins of a microcontroller
• Select XTAL capacitors by reading the XTAL data sheet
• Single-ended analog inputs
– MD2, MD5, MD6 configuration (see the Pin Configuration and Functions for the PCM1860 and PCM1861)
• Audio slave mode
– MD0, MD1 grounded (see Figure 64, and the Pin Configuration and Functions for the PCM1860 and
PCM1861)
• The power rails in this application allow the usage of X7R Ceramic capacitors. A maximum voltage rating of
6.3 V should be enough for the power supply capacitors.
• Configure the microcontroller INT pin to be an input for interrupts, or change the function to output to pull high
to power down the PCM1860 and PCM1861.
10.2.1.3 Application Curves
0
±20
Amplitude (dB)
±40
±60
±80
±100
±120
±140
±160
20
200
2000
Frequency (Hz)
20000
C013
Figure 65. Frequency Response with –1-dB Input at 1 kHz
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Typical Applications (continued)
10.2.2 Stereo Recording Application for PCM186x Software-Controlled Devices in Slave PLL Mode with
1.8-V IOVDD
1.8 V
0.1 …F
2.2 k
2.2 k
Stereo
Pair 2
10 …F
Right MIC
10 …F
Stereo
Pair 1
1 VINL2/VIN1M
Mic Bias
10 …F
3.3 V
0.1 …F
2 VINR2/VIN2M
IOVDD 14
3 VINL1/VIN1P
DVDD 13
4 VINR1/VIN2P
AVDD
3.3 V
8
0.1 …F
Stereo
Pair 3
Left MIC
Stereo
Pair 4
30 VINR3/VIN3P
MD0 26
29 VINL3/VIN4P
MS/AD 25
28 VINR4/VIN3M
MC/SCL 24
27 VINL4/VIN4M
MOSI/SDA 23
10 …F
I²C Address Select
I²C Bus
9 XO
1.8 V
10 …F
5
10 XI
MISO/GPIO0/DMIN2 22
GPIO1/INTA/DMIN 21
Interrupt or GPIO
11 LDO
GPIO1/INTB/DMCLK 20
2.2 …F
2.2 …F
6 VREF
GPIO3/INTC 19
7 AGND
12 DGND
15 SCKI
DOUT 18
PCM1862
PCM1863
PCM1864
PCM1865
System
Processor
BCK 17
LRCK 16
Copyright © 2017, Texas Instruments Incorporated
NOTE: Pins not shown in specific order.
Figure 66. Stereo Recording Application for PCM186x Software-Controlled Devices in Slave PLL Mode
with 1.8-V IOVDD
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Typical Applications (continued)
10.2.2.1 Design Requirements
• Device control method: Software control by I2C
• Clock slave to a 1.8-V device that only supplies BCK and LRCK (such as a Bluetooth module)
• Single-ended analog inputs
10.2.2.2 Detailed Design Procedure
• Device control method: Configure for I2C by pulling MD0 to GND, and setting I2C address by setting the AD
pin high or low
• Make sure that BCK is configured in clock master device to be 64 × fS for automatic PLL setting to function.
• Single-ended analog inputs
– MD2, MD5, MD6 configuration; see
• Audio slave mode
– Configure appropriate clock registers
– Page 0, 0x20 - Set MST_MODE = 1 (I2S slave)
• The power rails in this application allow the usage of X7R ceramic capacitors. A maximum voltage rating of
6.3 V should be enough for the power-supply capacitors.
10.2.2.3 Application Curves
0
±20
Amplitude (dB)
±40
±60
±80
±100
±120
±140
±160
20
200
2000
Frequency (Hz)
20000
C013
Figure 67. Frequency Response With –60-dB Input at 1 kHz
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11 Power Supply Recommendations
11.1 Power-Supply Distribution and Requirements
The PCM186x powers the device using the pins shown in Figure 68.
AVDD
(3.3 V)
Primary
ADCs
Secondary
ADC
DVDD
(3.3 V)
IOVDD
(1.8 V or 3.3 V)
PLL
Digital IO
LDO
(1.8 V)
Digital Core
(DSP, Logic)
Analog Circuits
Oscillator
PGAs
1.8V LDO
Clock Halt
Detect
Digital Circuits
Power Circuits
Reference
Mic Bias
PCM186x
Copyright © 2017, Texas Instruments Incorporated
Figure 68. PCM186x Power Distribution Tree
The PCM186x uses a combination of 3.3-V functional blocks and 1.8-V functional blocks to achieve high analog
performance, combined with high levels of digital integration. As such, the device has three internal power rails.
AVDD provides the analog circuits with a clean 3.3-V rail. DVDD is used for 3.3-V digital clock circuits.
Externally, AVDD and DVDD can be connected together without significant impact to performance. The final rail,
IOVDD, is used for driving the input/output digital circuitry.
The PCM186x integrates an on-chip LDO to convert an external 3.3 V to the 1.8 V required by the digital core.
The LDO input is derived from IOVDD. Power-supply pin descriptions are listed in Table 25.
Table 25. Power-Supply Pin Descriptions
NAME
DESCRIPTION
AVDD
Analog voltage supply (3.3 V) that powers the ADC, PGA, reference, and secondary ADC.
DVDD
Digital voltage supply (3.3 V) that is used for the PLL and the oscillator circuit.
IOVDD
Input/output pin voltage. Also used as a source for the internal LDO for the digital circuit.
LDO
Output from the on-chip LDO that is used with a 0.1-µF decoupling capacitor. Can be driven (used as power input)
with a 1.8-V supply to bypass the on-chip LDO for lower power consumption.
AGND
Analog ground
DGND
Digital ground
11.2 1.8-V Support
All PCM186x devices can support external devices with a 1.8 V I/O. This operating mode is configured by driving
IOVDD and LDO with 1.8 V.
11.3 Brownout Conditions
The PCM186x devices do not have a brownout detector, or a reset pin to hold while the system is powering up.
Make sure that the system design meets minimum AVDD, DVDD and IOVDD requirements.
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11.4 Power-Up Sequence
The power-up sequence consists of the following steps:
1. Power-on reset
1. Power up AVDD, DVDD and IOVDD
2. Check if LDO is being driven with an external 1.8 V, or is an output. Enable LDO if required.
3. Release digital reset
2. Wait until analog voltage reference is stable
3. Configure clock (PLL requires < 250 µs)
4. Fade-in audio ADC content
11.5 Lowest Power-Down Modes
To achieve the lowest levels of power down and sleep current, the following recommended write sequences are
suggested on PCM186x software-controlled devices:
11.5.1 Lowest Power In Standby Mode (AVDD = DVDD = IOVDD = 3.3 V)
Consumption as low as 0.59 mW
0x00=0x00
0x70=0x14
0x00=0x03
0x12=0x41
0x00=0x00
//select page0
//power down reference
//select page3
//disable OSC
//select page0
11.5.2 Lowest Power in Sleep or Energysense Mode (AVDD = DVDD = IOVDD = 3.3 V)
Consumption as low as 14 mW
Clocks must be running during this process
0x00=0x00 //select page0
0x70=0x72 //enter in sleep mode
0x00=0xfd //select page253
0x14=0x10 //change global bias current
0x00=0x00 //select page0
Now stop the clocks
11.5.3 Lower Power in Sleep or Energysense Mode (AVDD = DVDD 3.3 V and IOVDD = 1.8 V)
Consumption as low as 11.15 mW
Clocks must be running during this process
0x00=0x00 //select page0
0x70=0x72 //enter in sleep mode
0x00=0xfd //select page253
0x14=0x10 //change global bias current
0x00=0x00 //select page0
stop the clocks (note: make sure the clock IO is 1.8 V)
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11.6 Power-On Reset Sequencing Timing Diagram
LDO Out
1.8V
1.5V
0V
LDO_GOOD
DVDD & AVDD
GOOD
OSC Clock
Counts 16 clocks
OSC GOOD
Digital Reset
Device
Config
Wait
REF
stable
Clock
Detection
PLL and
Clock Divider
Config
Wait for the PLL
lock
REF Fast Boot
2ms
PLL Lock Flag
Digital Module Clocks
DOUT
Fade -IN
Figure 69. Power-On Reset Timing Diagram
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11.7 Power Connection Examples
11.7.1 3.3-V AVDD, DVDD, and IOVDD Example
This example shows the most typical usage. One single supply, shared between all three supply voltage inputs.
Rail-connected decoupling capacitors are not shown. Figure 70 shows 3.3-V supply for all supplies. Figure 71
shows separate 3.3 V for AVDD and DVDD.
NOTE
There is no disadvantage in separating the AVDD and DVDD, as the device waits until
both are present before powering up.
AVDD
3.3 V
DVDD
PCM186x
IOVDD
LDO
1.8-V
Output
Copyright © 2017, Texas Instruments Incorporated
Figure 70. 3.3 V for All Supplies
AVDD
3.3 VA
DVDD
3.3 VD
PCM186x
IOVDD
LDO
1.8-V
Output
Copyright © 2017, Texas Instruments Incorporated
Figure 71. Separate 3.3 V for AVDD and DVDD
11.7.2 3.3-V AVDD, DVDD With 1.8-V IOVDD Example for Lower-Power Applications
The PCM186x also supports interfacing to lower power 1.8-V processors, as shown in Figure 72. In the presence
of an external 1.8 V connected to LDO, the internal LDO that takes DVDD (3.3 V) and converts it to the 1.8-V
core voltage is bypassed. Under such conditions, IOVDD will then be used as the 1.8-V source for the digital
core of the device. In such systems, it is still important to have 3.3 V for DVDD, as specific sections of the digital
core in the device run from 3.3 V.
AVDD
3.3 V
DVDD
PCM186x
IOVDD
LDO
1.8-V
External
Copyright © 2017, Texas Instruments Incorporated
Figure 72. 1.8-V IOVDD With 3.3 V for AVDD and DVDD
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11.8 Fade In
This sequence is the final stage of the power up and is illustrated in Figure 73. After the PLL has locked, the
ADC starts running, and the data follows the fade-in sequence according to the following steps:
1. Detect a zero crossing audio input.
2. Increment the volume towards 0 dB with S-shaped volume.
3. Repeat from step 1 until the result is 0 dB. The number of steps from mute to 0 dB is 48 steps.
4. If zero crossing does not occur for 8192 sample times (= time out), change the volume-per-sample time.
0 dB (Unmute)
Mute Event
Time
48 Steps / Zero Crossing
or
48 Steps / fS
Figure 73. S-Curve Fade-In Behavior
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12 Layout
12.1 Layout Guidelines
Employ best design practices when laying out a printed circuit board (PCB) for both analog and digital
components. The PCM186x audio ADC is a relatively simple device to lay out, even on a two-layer PCB. The
following basic recommendations for layout of the PCM186x help achieve the best possible performance of the
device.
• Separate analog and digital sections where layout permits. Route analog lines away from digital lines. This
routing technique prevents digital noise from coupling back into analog signals.
• The bottom copper plane can be a shared ground, whereas a ground plane can be used on the top layer as
well. Separated planes for analog and digital grounds are not required to achieve data sheet performance.
• Place decoupling capacitors as close as possible to the supply pins, and in the same layer of the device, to
yield the best results. Do not place vias between decoupling capacitors and the device.
• Place ground planes between the input traces to achieve the lowest crosstalk performance.
The EVM user’s guide shows the schematics, a bill of material, and a more detailed PCB layout.
12.1.1 Grounding and System Partitioning
Use the same plane for analog and digital grounds to avoid any potential voltage difference between these
grounds. On the PCM186x EVM, maximum SNR performance is achieved by using a single ground plane, and
making sure that the return currents for digital signals are not near the AGND pin or the input signals.
As shown in Figure 74, the pin layout of the PCM186x is partitioned into two sections: analog and digital. No
digital return currents (for example, clocks) are generated in the analog circuitry, as long as the system is
partitioned in such a way that digital signals are routed away from the analog sections.
1
30
2
3
29
Analog
Section
28
4
27
5
26
6
25
7
24
8
23
9
22
10
11
12
21
Digital
Section
20
19
13
18
14
17
15
16
Figure 74. Single Ground With Analog Pins Partitioned to the Top and Digital Pins at the Bottom
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12.2 Layout Example
Figure 75. Layout Example
13 Register Maps
13.1 Register Map Description
The register map is the primary way to configure the PCM186x software-controlled devices. The register map is
separated into four pages: 0,1,3, and 253. Page 0 handles all of the device configuration. Page 1 is used to
indirectly program coefficients into the two fixed function DSPs on the PCM186x. Page 3 and page 253 contain
additional registers for lower-power use. All undocumented registers are considered reserved; do not write to
undocumented registers.
Change pages by writing to register 0x00 with the required page.
Reset registers by writing 0xFE to register 0x00.
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13.2 Register Map Summary
Table 26. Register Map Summary
DEC
HEX
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
BIT 1
BIT 0
Page 0
86
1
0x01
PGA_VAL_CH1_L
2
0x02
PGA_VAL_CH1_R
3
0x03
PGA_VAL_CH2_L
4
0x04
PGA_VAL_CH2_R
5
0x05
SMOOTH
LINK
6
0x06
POL
RSV
SEL_L
7
0x07
POL
RSV
SEL_R
8
0x08
POL
RSV
SEL_L
9
0x09
POL
RSV
SEL_R
10
0x0A
11
0x0B
12
0x0C
13
0x0D
TX_TDM_OFFSET
14
0x0E
RX_TDM_OFFSET
15
0x0F
16
0x10
GPIO1_POL
GPIO1_FUNC
GPIO0_POL
GPIO0_FUNC
17
0x11
GPIO3_POL
GPIO3_FUNC
GPIO2_POL
GPIO2_FUNC
18
0x12
RSV
GPIO1_DIR
RSV
GPIO0_DIR2
19
0x13
RSV
GPIO3_DIR2
RSV
20
0x14
GPIO3_OUT
GPIO2_OUT
GPIO1_OUT
GPIO0_OUT
21
0x15
PULL_DOWN_DIS[3]
PULL_DOWN_DIS[2]
PULL_DOWN_DIS[1]
PULL_DOWN_DIS[0]
22
0x16
23
0x17
DPGA_VAL_CH2_L
24
0x18
DPGA_VAL_CH2_R
DPGA_CLIP_EN
MAX_ATT
START_ATT
RSV
RX_WLEN
AGC_EN
SEL
RSV
TDM_LRCK_MODE
TX_WLEN
FMT
RSV
TDM_OSEL
DPGA_VAL_CH1_L
GPIO2_DIR2
GPIO3_IN
GPIO2_IN
GPIO1_IN
GPIO0_IN
APGA_CH1_R
APGA_CH1_L
DIGMIC_4CH
DIGMIC_EN
RSV
DPGA_VAL_CH1_R
25
0x19
26
0x1A
DPGA_CH2_R
DPGA_CH2_L
27
0x1B
32
0x20
33
0x21
RSV
DIV_NUM
34
0x22
RSV
DIV_NUM
35
0x23
RSV
DIV_NUM
37
0x25
RSV
DIV_NUM
38
0x26
RSV
39
0x27
40
0x28
41
0x29
DIGMIC_IN1_SEL
DPGA_CH1_R
DPGA_CH1_L
APGA_CH2_R
DIGMIC_IN0_SEL
APGA_CH2_L
RSV
RSV
SCK_XI_SEL
MST_SCK_SRC
DIN_RESAMP
MST_MODE
ADC_CLK_SRC
DSP2_CLK_SRC
DSP1_CLK_SRC
CLKDET_EN
PLL_REF_SEL
PLL_EN
DIV_NUM
DIV_NUM
RSV
RSV
LOCK
RSV
P
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Table 26. Register Map Summary (continued)
DEC
HEX
42
0x2A
BIT 7
BIT 6
BIT 5
BIT 4
BIT 3
BIT 2
RSV
BIT 1
BIT 0
R
43
0x2B
44
0x2C
RSV
J
45
0x2D
48
0x30
CH4R
CH4L
CH3R
CH3L
CH2R
CH2L
CH1R
CH1L
49
0x31
CH4R
CH4L
CH3R
CH3L
CH2R
CH2L
CH1R
CH1L
50
0x32
CH4R
CH4L
CH3R
CH3L
CH2R
CH2L
CH1R
CH1L
51
0x33
52
0x34
RSV
TIME
54
0x36
RSV
INT_INTVL
64
0x40
REF
65
0x41
DIFF
66
0x42
LEVEL
67
0x43
REF
68
0x44
DIFF
69
0x45
LEVEL
70
0x46
REF
71
0x47
DIFF
72
0x48
LEVEL
73
0x49
REF
74
0x4A
DIFF
75
0x4B
LEVEL
76
0x4C
REF
77
0x4D
DIFF
78
0x4E
LEVEL
79
0x4F
REF
80
0x50
DIFF
81
0x51
LEVEL
82
0x52
REF
83
0x53
DIFF
84
0x54
LEVEL
85
0x55
REF
86
0x56
DIFF
87
0x57
88
0x58
89
0x59
90
0x5A
96
0x60
RSV
POSTPGA_CP
RSV
DC_CHANG
DIN_TOGGLE
97
0x61
RSV
POSTPGA_CP
RSV
DC_CHANG
DIN_TOGGLE
98
0x62
D_LSB
RSV
D_MSB
RSV
TIME
LEVEL
DC_NOLATCH
AUXADC_RDY
DC_RDY
AUXADC_LATCH
AUXADC_DATA_TYPE
DC_CH
AUXADC_DATA_LSB
AUXADC_DATA_MSB
RSV
POL1
POL0
RSV
ENGSTR
ENGSTR
WIDTH
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Table 26. Register Map Summary (continued)
DEC
HEX
BIT 7
112
0x70
113
0x71
114
0x72
115
0x73
116
0x74
RSV
117
0x75
RSV
120
0x78
BIT 6
BIT 5
BIT 4
BIT 3
RSV
2CH
RSV
FLT
HPF_EN
MUTE_CH2_R
BIT 2
BIT 1
BIT 0
PWRDN
SLEEP
STBY
MUTE_CH1_R
MUTE_CH1_L
MUTE_CH2_L
RSV
STATE
RSV
INFO
BCK_RATIO2
LRCKHLT
RSV
BCKHLT
SCKHTL
RSV
RSV
SCK_RATIO2
LRCKERR
BCKERR
SCKERR
DVDD
AVDD
LDO
BUSY
R_REQ
W_REQ
Page 1
1
0x01
2
0x02
4
0x04
MEM_WDATA_0
5
0x05
MEM_WDATA_1
6
0x06
7
0x07
8
0x08
MEM_RDATA_0
MEM_RDATA_1
9
0x09
10
0x0A
11
0x0B
RSV
DONE
RSV
RSV
MEM_ADDR
MEM_WDATA_2
MEM_WDATA3
RSV
MEM_RDATA_2
MEM_RDATA_3
RSV
Page 3
18
0x12
RSV
PD
21
0x15
RSV
PDZ
Page 253
20
88
0x14
PGA_ICI
REF_ICI
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RSV
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13.3
SLAS831D – MARCH 2014 – REVISED MARCH 2018
Page 0 Registers
13.3.1 Page 0: Register 1 (address = 0x01) [reset = 0x00]
Figure 76. Page 0: Register 1
7
6
5
4
3
2
1
0
PGA_VAL_CH1_L
R/W-0000 0000b
Table 27. Page 0: Register 1 Field Descriptions
Bit
Field
Type
Reset
7-0
PGA_VAL_CH1_L
R/W
0000 0000b PGA Value Channel 1 Left
Global channel gain for ADC1L. (analog + digital). Analog gain
only, if manual gain mapping is enabled. (0x19)
Specify two's complement value with 7.1 format.
1110 1000: –12.0 dB (Min)
…
1111 1110: –1.0 dB
1111 1111: 0.5 dB
0000 0000: 0.0 dB (default)
0000 0001: 0.5 dB
…
0000 0010: 1.0 dB
…
0001 1000: 12.0 dB
…
0010 1000: 20.0 dB
…
0100 0000: 32.0 dB
…
0101 0000: 40.0 dB (Max)
Description
13.3.2 Page 0: Register 2 (address = 0x02) [reset = 0x00]
Figure 77. Page 0: Register 2
7
6
5
4
3
2
1
0
PGA_VAL_CH1_R
R/W-0000 0000b
Table 28. Page 0: Register 2 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
PGA_VAL_CH1_R
R/W
0000 0000b PGA Value Channel 1 Right
Programmable gain value, channel 1 right (see Page 0, 0x01
for complete description)
13.3.3 Page 0: Register 3 (address = 0x03) [reset = 0x00]
Figure 78. Page 0: Register 3
7
6
5
4
3
PGA_VAL_CH2_L
R/W-0000 0000b
2
1
0
Table 29. Page 0: Register 3 Field Descriptions
Bit
Field
Type
Reset
7-0
PGA_VAL_CH2_L
R/W
0000 0000b PGA Value Channel 2 Left
Programmable gain value, channel 2 left (see Page 0, 0x01 for
complete description)
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Description
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13.3.4 Page 0: Register 4 (address = 0x04) [reset = 0x00]
Figure 79. Page 0: Register 4
7
6
5
4
3
PGA_VAL_CH2_R
R/W-0000 0000b
2
1
0
Table 30. Page 0: Register 4 Field Descriptions
Bit
Field
Type
Reset
7-0
PGA_VAL_CH2_R
R/W
0000 0000b PGA Value Channel 2 Right
Programmable gain value, channel 2 right (see Page 0, 0x01
for complete description)
Description
13.3.5 Page 0: Register 5 (address = 0x05) [reset = 0x86]
Figure 80. Page 0: Register 5
7
6
SMOOTH
LINK
R/W-1b
R/W-0b
5
DPGA_CLIP_E
N
R/W-0b
4
3
2
1
MAX_ATT
START_ATT
R/W-00b
R/W-11b
0
AGC_EN
R/W-0b
Table 31. Page 0: Register 5 Field Descriptions
Bit
Field
Type
Reset
Description
7
SMOOTH
R/W
1b
PGA Control
Enable PGA smooth change
0: Immediate change
1: Smooth change (default)
6
LINK
R/W
0b
Link PGA Control
0: Independent control (default)
1: Ch1[R] / Ch2[L] / Ch2[R] follow Ch1[L] PGA value.
5
DPGA_CLIP_EN
R/W
0b
Enable Clipping Detection After Digital PGA
0: Disable (default)
1: Enable
4-3
MAX_ATT
R/W
00b
Attenuation Limit of the Automatic Clipping Suppression
00: –3 dB (default)
01: –4 dB
10: –5 dB
11: –6 dB
2-1
START_ATT
R/W
11b
Start Automatic Clipping Suppression After Clipping is
Detected CLIP_NUM Times
00: 80
01: 40
10: 20
11: 10 (default)
AGC_EN
R/W
0b
Enable Automatic Clipping Suppression
0: Disable (default)
1: Enable
0
90
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.6 Page 0: Register 6 (address = 0x06) [reset = 0x41]
Figure 81. Page 0: Register 6
7
POL
R/W-0b
6
RSV
R/W-1b
5
4
3
2
1
0
SEL_L
R/W-00 0001b
Table 32. Page 0: Register 6 Field Descriptions
Bit
Field
Type
Reset
Description
7
POL
R/W
0b
Change ADC1_INPUT_SEL_L Signal Polarity
0: Normal (default)
1: Inverted
6
RSV
R/W
1b
Reserved. Always write 1.
SEL_L
R/W
00 0001b
ADC 1 Input Channel Select (ADC1L)
00 0000: No select
00 0001: VINL1[SE] (default)
00 0010: VINL2[SE]
00 0011: VINL2[SE] + VINL1[SE]
00 0100: VINL3[SE]
00 0101: VINL3[SE] + VINL1[SE]
00 0110: VINL3[SE] + VINL2[SE]
00 0111: VINL3[SE] + VINL2[SE] + VINL1[SE]
00 1000: VINL4[SE]
00 1001: VINL4[SE] + VINL1[SE]
00 1010: VINL4[SE] + VINL2[SE]
00 1011: VINL4[SE] + VINL2[SE] + VINL1[SE]
00 1100: VINL4[SE] + VINL3[SE]
00 1101: VINL4[SE] + VINL3[SE] + VINL1[SE]
00 1110: VINL4[SE] + VINL3[SE] + VINL2[SE]
00 1111: VINL4[SE] + VINL3[SE] + VINL2[SE] + VINL1[SE]
01 0000: {VIN1P, VIN1M}[DIFF]
10 0000: {VIN4P, VIN4M}[DIFF]
11 0000: {VIN1P, VIN1M}[DIFF] + {VIN4P, VIN4M}[DIFF]
5-0
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13.3.7 Page 0: Register 7 (address = 0x07) [reset = 0x41]
Figure 82. Page 0: Register 7
7
POL
R/W-0b
6
RSV
R/W-1b
5
4
3
2
1
0
SEL_R
R/W-00 0001b
Table 33. Page 0: Register 7 Field Descriptions
Bit
Field
Type
Reset
Description
7
POL
R/W
0b
Change ADC1_INPUT_SEL_R Signal Polarity
0: Normal (default)
1: Inverted
6
RSV
R/W
1b
Reserved. Do not access.
SEL_R
R/W
00 0001b
ADC 1 Input Channel Select (ADC1R)
00 0000: No select
00 0001: VINR1[SE] (default)
00 0010: VINR2[SE]
00 0011: VINR2[SE] + VINR1[SE]
00 0100: VINR3[SE]
00 0101: VINR3[SE] + VINR1[SE]
00 0110: VINR3[SE] + VINR2[SE]
00 0111: VINR3[SE] + VINR2[SE] + VINR1[SE]
00 1000: VINR4[SE]
00 1001: VINR4[SE] + VINR1[SE]
00 1010: VINR4[SE] + VINR2[SE]
00 1011: VINR4[SE] + VINR2[SE] + VINR1[SE]
00 1100: VINR4[SE] + VINR3[SE]
00 1101: VINR4[SE] + VINR3[SE] + VINR1[SE]
00 1110: VINR4[SE] + VINR3[SE] + VINR2[SE]
00 1111: VINR4[SE] + VINR3[SE] + VINR2[SE] + VINR1[SE]
01 0000: {VIN2P, VIN2M}[DIFF]
10 0000: {VIN3P, VIN3M}[DIFF]
11 0000: {VIN2P, VIN2M}[DIFF] + {VIN3P, VIN3M}[DIFF]
5-0
92
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.8 Page 0: Register 8 (address = 0x08) [reset = 0x42]
Figure 83. Page 0: Register 8
7
POL
R/W-0b
6
RSV
R/W-1b
5
4
3
2
1
0
SEL_L
R/W-00 0010b
Table 34. Page 0: Register 8 Field Descriptions
Bit
Field
Type
Reset
Description
7
POL
R/W
0b
Change ADC2_INPUT_SEL_L Signal Polarity
0: Normal (default)
1: Inverted
6
RSV
R/W
1b
Reserved. Do not access.
SEL_L
R/W
00 0010b
ADC 2 Input Channel Select (ADC2L)
00 0000: No select
00 0001: VINL1[SE] (default)
00 0010: VINL2[SE]
00 0011: VINL2[SE] + VINL1[SE]
00 0100: VINL3[SE]
00 0101: VINL3[SE] + VINL1[SE]
00 0110: VINL3[SE] + VINL2[SE]
00 0111: VINL3[SE] + VINL2[SE] + VINL1[SE]
00 1000: VINL4[SE]
00 1001: VINL4[SE] + VINL1[SE]
00 1010: VINL4[SE] + VINL2[SE]
00 1011: VINL4[SE] + VINL2[SE] + VINL1[SE]
00 1100: VINL4[SE] + VINL3[SE]
00 1101: VINL4[SE] + VINL3[SE] + VINL1[SE]
00 1110: VINL4[SE] + VINL3[SE] + VINL2[SE]
00 1111: VINL4[SE] + VINL3[SE] + VINL2[SE] + VINL1[SE]
01 0000: {VIN1P, VIN1M}[DIFF]
10 0000: {VIN4P, VIN4M}[DIFF]
11 0000: {VIN1P, VIN1M}[DIFF] + {VIN4P, VIN4M}[DIFF]
5-0
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13.3.9 Page 0: Register 9 (address = 0x09) [reset = 0x42]
Figure 84. Page 0: Register 9
7
POL
R/W-0b
6
RSV
R/W-1b
5
4
3
2
1
0
SEL_R
R/W-00 0010b
Table 35. Page 0: Register 9 Field Descriptions
Bit
Field
Type
Reset
Description
7
POL
R/W
0b
Change ADC2_INPUT_SEL_R Signal Polarity
0: Normal (default)
1: Inverted
6
RSV
R/W
1b
Reserved. Do not access.
SEL_R
R/W
00 0010b
ADC 2 Input Channel Select (ADC2R)
00 0000: No select
00 0001: VINR1[SE] (default)
00 0010: VINR2[SE]
00 0011: VINR2[SE] + VINR1[SE]
00 0100: VINR3[SE]
00 0101: VINR3[SE] + VINR1[SE]
00 0110: VINR3[SE] + VINR2[SE]
00 0111: VINR3[SE] + VINR2[SE] + VINR1[SE]
00 1000: VINR4[SE]
00 1001: VINR4[SE] + VINR1[SE]
00 1010: VINR4[SE] + VINR2[SE]
00 1011: VINR4[SE] + VINR2[SE] + VINR1[SE]
00 1100: VINR4[SE] + VINR3[SE]
00 1101: VINR4[SE] + VINR3[SE] + VINR1[SE]
00 1110: VINR4[SE] + VINR3[SE] + VINR2[SE]
00 1111: VINR4[SE] + VINR3[SE] + VINR2[SE] + VINR1[SE]
01 0000: {VIN2P, VIN2M}[DIFF]
10 0000: {VIN3P, VIN3M}[DIFF]
11 0000: {VIN2P, VIN2M}[DIFF] + {VIN3P, VIN3M}[DIFF]
5-0
94
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.10 Page 0: Register 10 (address = 0x0A) [reset = 0x00]
Figure 85. Page 0: Register 10
7
6
5
4
3
2
RSV
R/W-0000b
1
0
SEL3
R/W-0000b
Table 36. Page 0: Register 10 Field Descriptions
Bit
Field
Type
Reset
Description
7-4
RSV
R/W
0000b
Reserved. Do not access.
3-0
SEL
R/W
0000b
Secondary ADC Input Channel
Do not select the same channel that is already in use by an
audio ADC
0: No Select (default)
1: ch1(L)
2: ch1(R)
3: ch2(L)
4: ch2(R)
5: ch3(L)
6: ch3(R)
7: ch4(L)
8: ch4(R)
13.3.11 Page 0: Register 11 (address = 0x0B) [reset = 0x44]
Figure 86. Page 0: Register 11
7
RX_WLEN
6
5
RSV
R/W-01b
R/W-0
4
TDM_LRCK_M
ODE
R/W-0b
3
2
1
0
TX_WLEN
FMT
R/W-01b
R/W-00b
Table 37. Page 0: Register 11 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
RX_WLEN
R/W
01b
Receive PCM Word Length
00: 32-bit
01: 24-bit (default)
10: 20-bit
11: 16-bit
5
RSV
R/W
0b
Reserved. Do not access.
4
TDM_LRCK_MODE
R/W
0b
LRCK Duty Cycle in TDM Mode
TDM format can support 2 channels, 4 channels, or 6 channels
with one device.
When BCK to LRCK ratio is 256, FMT must be configured as
TDM format.
Configure the duty cycle of LRCK when I2S is configured as
TDM mode
0: duty cycle of LRCK is 50% (default)
1: duty cycle of LRCK is 1/256 (similar DSP mode)
3-2
TX_WLEN
R/W
01b
Stereo PCM Word Length
00: 32-bit
01: 24-bit (default)
10: 20-bit
11: 16-bit
1-0
FMT
R/W
00b
Serial Audio Interface Format (TDM/DSP Mode)
0: I2S (default)
1: Left justified
2: Right justified
3: TDM/DSP (256fS BCK is required)
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13.3.12
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Page 0: Register 12 (address = 0x0C) [reset = 0x00]
Figure 87. Page 0: Register 12
7
6
5
4
3
2
1
RSV
R/W-000000b
0
TDM_OSEL
R/W-00b
Table 38. Page 0: Register 12 Field Descriptions
Bit
Field
Type
Reset
Description
7-2
RSV
R/W
000000b
Reserved. Do not access.
1-0
TDM_OSEL
R/W
00b
Select TDM Transmission Data
Ch2 data only available on 4-channel device.
00: 2ch TDM (default)
DOUT1: ch1[L], ch1[R]
DOUT2: ch2[L], ch2[R]
01: 4ch TDM
DOUT1: ch1[L], ch1[R], ch2[L], ch2[R]
DOUT2: ch1[L], ch1[R], ch2[L], ch2[R]
10: 6ch TDM
DOUT1: ch1[L], ch1[R], ch2[L], ch2[R], sec_ADC_LPF,
sec_ADC_HPF
DOUT2: ch1[L], ch1[R], ch2[L], ch2[R], sec_ADC_LPF,
sec_ADC_HPF
11: RESERVED
13.3.13 Page 0: Register 13 (address = 0x0D) [reset = 0x00]
Figure 88. Page 0: Register 13
7
6
5
4
3
TX_TDM_OFFSET
R/W-0000 0000b
2
1
0
Table 39. Page 0: Register 13 Field Descriptions
96
Bit
Field
Type
Reset
7-0
TX_TDM_OFFSET
R/W
0000 0000b Set Offset Position in Serial Audio Data Frame
This setting is enabled when 0x0B FMT[1:0] is set to DSP
format.
0: 0 (default)
1: 1 BCK (same as I2S)
2: 2 BCK
3: 3 BCK
:
255: 255 BCK
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Description
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.14 Page 0: Register 14 (address = 0x0E) [reset = 0x00]
Figure 89. Page 0: Register 14
7
6
5
4
3
RX_TDM_OFFSET
R/W-0000 0000b
2
1
0
Table 40. Page 0: Register 14 Field Descriptions
Bit
Field
Type
Reset
7-0
RX_TDM_OFFSET
R/W
0000 0000b Set Offset Position in a Serial Audio Data Frame
This setting is enabled when I2S_RX_FMT is set to DSP
format.
Offset position in a serial audio data frame.
0: 0 (default)
1: 1 BCK (same as I2S, only if LRCK is configured as 50% duty
cycle)
2: 2 BCK
3: 3 BCK
:
255: 255 BCK
Description
13.3.15 Page 0: Register 15 (address = 0x0F) [reset = 0x00]
Figure 90. Page 0: Register 15
7
6
5
4
3
DPGA_VAL_CH1_L
R/W-0000 0000b
2
1
0
Table 41. Page 0: Register 15 Field Descriptions
Bit
Field
Type
Reset
7-0
DPGA_VAL_CH1_L
R/W
0000 0000b Gain Setting for Digital PGA Channel 1 Left
4-channel PCM186x only when is used in following scenarios:
i. Analog PGA gain and digital PGA are set separately.
ii. Digital microphone Interface is used (when manual gain
mapping is enabled in register 0x19).
Specify two's complement value with 7.1 format.
0x28 to 0x3F in 0.5-dB steps
Others: Reserved
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13.3.16 Page 0: Register 16 (address = 0x10) [reset = 0x01]
Figure 91. Page 0: Register 16
7
GPIO1_POL
R/W-0b
6
5
GPIO1_FUNC
R/W-000b
4
3
GPIO0_POL
R/W-0b
2
1
GPIO0_FUNC
R/W-001b
0
Table 42. Page 0: Register 16 Field Descriptions
Bit
7
6-4
3
2-0
98
Field
Type
Reset
Description
GPIO1_POL
R/W
0b
GPIO1 Polarity Control
0: Normal (default)
1: Invert
GPIO1_FUNC
R/W
000b
Function select, GPIO1
000: GPIO1(default)
001: Digital mic input 1(In)
010: INT
011: Internal SCK (Out)
100: Digital mute (In)
101: DOUT2 (Out)
110: DIN (In)
111: Reserved
GPIO0_POL
R/W
0b
GPIO0 Polarity Control
0: Normal (default)
1: Invert
GPIO0_FUNC
R/W
001b
Function select, GPIO0
000: GPIO0
001: Digital mic input 0 (In, default)
010: SPI MISO (Ou)
011: Internal SCK (Out)
100: Digital mute (In)
101: DOUT2 (Out)
110: DIN (In)
111: Reserved
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.17 Page 0: Register 17 (address = 0x11) [reset = 0x20]
Figure 92. Page 0: Register 17
7
GPIO3_POL
R/W-0b
6
5
GPIO3_FUNC
R/W-010b
4
3
GPIO2_POL
R/W-0b
2
1
GPIO2_FUNC
R/W-000b
0
Table 43. Page 0: Register 17 Field Descriptions
Bit
7
6-4
3
2-0
Field
Type
Reset
Description
GPIO3_POL
R/W
0b
GPIO3 Polarity Control
0: Normal (default)
1: Invert
GPIO3_FUNC
R/W
010b
Function select, GPIO1
000: GPIO3
001: Reserved
010: INT (default)
011: Internal SCK (Out)
100: Digital mute (In)
101: DOUT2 (Out)
110: DIN (In)
111: Reserved
GPIO2_POL
R/W
0b
GPIO2 Polarity Control
0: Normal (default)
1: Invert
GPIO2_FUNC
R/W
000b
Function select, GPIO2
000: GPIO2 (default)
001: Digital mic clock output 0 (Out)
010: INT
011: Internal SCK (Out)
100: Digital mute (In)
101: DOUT2 (Out)
110: DIN (In)
111: Reserved
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13.3.18 Page 0: Register 18 (address = 0x12) [reset = 0x00]
Figure 93. Page 0: Register 18
7
RSV
R/W-0b
6
5
GPIO1_DIR
R/W-000b
4
3
RSV
R/W-0b
2
1
GPIO0_DIR
R/W-000b
0
Table 44. Page 0: Register 18 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
GPIO1_DIR
R/W
000b
Direction Control of GPIO1 When Configured as GPIO
Function
000: Input (default)
001: Input with sticky bit
010: Input with toggle detection
011: Raw input (not deglictched)
100: Output
101: Open drain
110: Reserved
111: Reserved
RSV
R/W
0b
Reserved. Do not access.
GPIO0_DIR
R/W
000b
Direction Control of GPIO0 When Configured as GPIO
Function
000: Input (default)
001: Input with sticky bit
010: Input with toggle detection
011: Raw input (not deglictched)
100: Output
101: Open drain
110: Reserved
111: Reserved
6-4
3
2-0
100
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13.3.19 Page 0: Register 19 (address = 0x13) [reset = 0x00]
Figure 94. Page 0: Register 19
7
RSV
R/W-0b
6
5
GPIO3_DIR
R/W-000b
4
3
RSV
R/W-0b
2
1
GPIO2_DIR
R/W-000b
0
Table 45. Page 0: Register 19 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
GPIO3_DIR
R/W
000b
Direction Control of GPIO3 When Configured as GPIO
Function
000: Input (default)
001: Input with sticky bit
010: Input with toggle detection
011: Raw input (not deglictched)
100: Output
101: Open drain
110: Reserved
111: Reserved
RSV
R/W
0b
Reserved. Do not access.
GPIO2_DIR
R/W
000b
Direction Control of GPIO2 When Configured as GPIO
Function
000: Input (default)
001: Input with sticky bit
010: Input with toggle detection
011: Raw input (not deglictched)
100: Output
101: Open drain
110: Reserved
111: Reserved
6-4
3
2-0
13.3.20 Page 0: Register 20 (address = 0x14) [reset = 0x00]
Figure 95. Page 0: Register 20
7
GPIO3_OUT
R/W-0b
6
GPIO2_OUT
R/W-0b
5
GPIO1_OUT
R/W-0b
4
GPIO0_OUT
R/W-0b
3
GPIO3_IN
R-0b
2
GPIO2_IN
R-0b
1
GPIO1_IN
R-0b
0
GPIO0_IN
R-0b
Table 46. Page 0: Register 20 Field Descriptions
Bit
Field
Type
Reset
Description
7
GPIO3_OUT
R/W
0b
GPIO3 Output Status
6
GPIO2_OUT
R/W
0b
GPIO2 Output Status
5
GPIO1_OUT
R/W
0b
GPIO1Output Status
4
GPIO0_OUT
R/W
0b
GPIO0 Output Status
3
GPIO3_IN
R/W
0b
GPIO3 Input Status or Toggle Status
The sticky flag is cleared when this register is read.
2
GPIO2_IN
R/W
0b
GPIO2 Input Status or Toggle Status
The sticky flag is cleared when this register is read.
1
GPIO1_IN
R/W
0b
GPIO1 Input Status or Toggle Status
The sticky flag is cleared when this register is read.
0
GPIO0_IN
R/W
0b
GPIO0 Input Status or Toggle Status
The sticky flag is cleared when this register is read.
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13.3.21 Page 0: Register 21 (address = 0x15) [reset = 0x00]
Figure 96. Page 0: Register 21
7
PULL_DOWN_
DIS[3]
R/W-0b
6
PULL_DOWN_
DIS[2]
R/W-0b
5
PULL_DOWN_
DIS[1]
R/W-0b
4
PULL_DOWN_
DIS[0]
R/W-0b
3
2
1
0
RSV
R/W-0000b
Table 47. Page 0: Register 21 Field Descriptions
Bit
Field
Type
Reset
Description
7
PULL_DOWN_DIS[3]
R/W
0b
Enable or Disable the Pull-Down Resistor of GPIO3
0: Enable the pull down of GPIO3, IntC (pin 19)
1: Disable the pull down
6
PULL_DOWN_DIS[2]
R/W
0b
Enable or Disable the Pull-Down Resistor of GPIO2
0: Enable the pull down of GPIO2, IntB (pin 20)
5
PULL_DOWN_DIS[1]
R/W
0b
Enable or Disable the Pull-Down Resistor of GPIO1
0: Enable the pull down of GPIO1 (pin 21)
1: Disable the pull down
4
PULL_DOWN_DIS[0]
R/W
0b
Enable or Disable the Pull-Down Resistor of GPIO0
0: Enable the pull down of GPIO0 (pin 22)
1: Disable the pull down
RSV
R/W
0b
Reserved. Do not access.
3-0
13.3.22 Page 0: Register 22 (address = 0x16) [reset = 0x00]
Figure 97. Page 0: Register 22
7
6
5
4
3
DPGA_VAL_CH1_R
R/W-0000 0000b
2
1
0
Table 48. Page 0: Register 22 Field Descriptions
102
Bit
Field
Type
Reset
7-0
DPGA_VAL_CH1_R
R/W
0000 0000b Gain Setting for Digital PGA Channel 1 Right
4-channel PCM186x only when is used in following scenarios:
i. Analog PGA gain and digital PGA are set separately
ii. Digital microphone Interface is used (\when manual gain
mapping is enabled in register 0x19)
Specify two's complement value with 7.1 format.
0010 1000: 0.0 dB
0010 1001: 0.5 dB
0010 1010: 1.0 dB
0010 1011: 1.5 dB
:
0011 1111: 7.5 dB (max)
Others: Reserved
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Description
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.23 Page 0: Register 23 (address = 0x17) [reset = 0x00]
Figure 98. Page 0: Register 23
7
6
5
4
3
DPGA_VAL_CH2_L
R/W-0000 0000b
2
1
0
Table 49. Page 0: Register 23 Field Descriptions
Bit
Field
Type
Reset
7-0
DPGA_VAL_CH2_L
R/W
0000 0000b Gain Setting for Digital PGA Channel 2 Left
4-channel PCM186x only. See Page 0, Reg 0x16 description
Description
13.3.24 Page 0: Register 24 (address = 0x18) [reset = 0x00]
Figure 99. Page 0: Register 24
7
6
5
4
3
DPGA_VAL_CH2_R
R/W-0000 0000b
2
1
0
Table 50. Page 0: Register 24 Field Descriptions
Bit
Field
Type
Reset
7-0
DPGA_VAL_CH2_R
R/W
0000 0000b Gain Setting for Digital PGA channel 2 Right
4-channel PCM186x only. See Page 0, Reg 0x16 description
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Description
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13.3.25 Page 0: Register 25 (address = 0x19) [reset = 0x00]
Figure 100. Page 0: Register 25
7
DPGA_CH2_R
R/W-0b
6
DPGA_CH2_L
R/W-0b
5
DPGA_CH1_R
R/W-0b
4
DPGA_CH1_L
R/W-0b
3
APGA_CH2_R
R/W-0b
2
APGA_CH2_L
R/W-0b
1
APGA_CH1_R
R/W-0b
0
APGA_CH1_L
R/W-0b
Table 51. Page 0: Register 25 Field Descriptions
Bit
104
Field
Type
Reset
Description
7
DPGA_CH2_R
R/W
0b
DPGA Control Mapping (4-channel PCM186x only)
CH2_R channel (Note: Using manual gain mapping in the 2channel device sets the digital gain to 0dB.)
0: Auto gain mapping (default)
1: Manual gain mapping
6
DPGA_CH2_L
R/W
0b
DPGA Control Mapping (4-channel PCM186x only)
Gain control mode for digital PGA of CH2_L channel
0: Auto gain mapping (default)
1: Manual gain mapping
5
DPGA_CH1_R
R/W
0b
DPGA Control Mapping (4-channel PCM186x only)
Gain control mode for digital PGA of CH1_R channel
0: Auto gain mapping (default)
1: Manual gain mapping
4
DPGA_CH1_L
R/W
0b
DPGA Control Mapping (4-channel PCM186x only)
Gain control mode for digital PGA of CH1_L channel
0: Auto gain mapping (default)
1: Manual gain mapping
3
APGA_CH2_R
R/W
0b
APGA Control Mapping (4-channel PCM186x only)
Gain control mode for analog PGA of CH2_R channel
0: Auto gain mapping (default)
1: Manual gain mapping
2
APGA_CH2_L
R/W
0b
APGA Control Mapping (4-channel PCM186x only)
Gain control mode for analog PGA of CH2_L channel
0: Auto gain mapping (default)
1: Manual gain mapping
1
APGA_CH1_R
R/W
0b
APGA Control Mapping (4-channel PCM186x only)
Gain control mode for analog PGA of CH1_R channel
0: Auto gain mapping (default)
1: Manual gain mapping
0
APGA_CH1_L
R/W
0b
APGA Control Mapping (4-channel PCM186x only)
Gain control mode for analogPGA of CH1_L channel
0: Auto gain mapping (default)
1: Manual gain mapping
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.26 Page 0: Register 26 (address = 0x1A) [reset = 0x00]
Figure 101. Page 0: Register 26
7
6
DIGMIC_IN1_SEL
R/W-00b
5
4
DIGMIC_IN0_SEL
R/W-00b
3
2
1
DIGMIC_4CH
R/W-0b
RSV
R/W-00b
0
DIGMIC_EN
R/W-0b
Table 52. Page 0: Register 26 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
DIGMIC_IN1_SEL
R/W
00b
Digital Mic Data Input Selection for MIC1 Interface (4-channel
devices only)
00: GPIO0 (default)
01: GPIO1
10: Invalid
11: Invalid
5-4
DIGMIC_IN0_SEL
R/W
00b
Digital Mic Data Input Selection for MIC0 Interface
00: GPIO0 (default)
01: GPIO1
10: Invalid
11: Invalid
3-2
RSV
R/W
00b
Reserved. Do not access.
1
DIGMIC_4CH
R/W
0b
Second Pair of Filters Selection for Digital Microphone as
Signal Processing (4-channel device only)
0: configured for analog ADC signal processing (default)
1: configured for digital MIC signal processing
0
DIGMIC_EN
R/W
0b
First Pair of Filters Selection for Digital Microphone as Signal
Processing
0: configured as analog ADC signal processing (default)
1: configured as digital MIC signal processing
13.3.27 Page 0: Register 27 (address = 0x1B) [reset = 0x00]
Figure 102. Page 0: Register 27
7
6
5
4
3
2
1
RSV
R/W-00 0000b
0
DIN_RESAMP
R/W-00b
Table 53. Page 0: Register 27 Field Descriptions
Bit
Field
Type
Reset
Description
7-2
RSV
R/W
00 0000b
Reserved. Do not access.
1-0
DIN_RESAMP
R/W
00b
Resample DIN with Internal BCK to Avoid Internal Timing Issue
00: No resample (default)
01: resample DIN with rising edge of BCK
10: resample DIN with falling edge of BCK
11: Not supported
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13.3.28 Page 0: Register 32 (address = 0x20) [reset = 0x01]
Figure 103. Page 0: Register 32
7
6
SCK_XI_SEL
R/W-00b
5
MST_SCK_SR
C
R/W-0b
4
MST_MODE
R/W-0b
3
ADC_CLK_SR
C
R/W-0b
2
1
DSP2_CLK_SR DSP1_CLK_SR
C
C
R/W-0b
R/W-0b
0
CLKDET_EN
R/W-1b
Table 54. Page 0: Register 32 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
SCK_XI_SEL
R/W
00b
SCK or XTAL Selection
00: SCK or XTAL (default)
01: SCK
10: XTAL
11: Reserved
5
MST_SCK_SRC
R/W
0b
Master-Mode SCK Source Selection
0: SCK or XI (default)
1: PLL (as in BCK PLL mode)
4
MST_MODE
R/W
0b
Master or Slave Selection
0: Slave (default)
1: Master
3
ADC_CLK_SRC
R/W
0b
ADC Clock Source Selection (ignored if CLKDET_EN = 1)
0: SCK (default)
1: PLL
2
DSP2_CLK_SRC
R/W
0b
DSP2 Clock Source Selection (ignored if CLKDET_EN = 1)
0: SCK (default)
1: PLL
1
DSP1_CLK_SRC
R/W
0b
DSP1 Clock Source Selection (ignored if CLKDET_EN = 1)
0: SCK (default)
1: PLL
0
CLKDET_EN
R/W
1b
Enable Auto Clock Detector Configuration
0: Disable
1: Enable (default)
13.3.29 Page 0: Register 33 (address = 0x21) [reset = 0x00]
Figure 104. Page 0: Register 33
7
RSV
R/W-0b
6
5
4
3
DIV_NUM
R/W-000 0000b
2
1
0
Table 55. Page 0: Register 33 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
DIV_NUM
R/W
000 0000b
Set DSP1 Clock Divider Value
Ignored if CLKDET_EN = 1
0: 1 (default)
1: 1/2
2: 1/3
3: 1/4
:
127: 1/128
6-0
106
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.30 Page 0: Register 34 (address = 0x22) [reset = 0x01]
Figure 105. Page 0: Register 34
7
RSV
R/W-0b
6
5
4
3
DIV_NUM
R/W-000 0001b
2
1
0
1
0
Table 56. Page 0: Register 34 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
DIV_NUM
R/W
000 0001b
Set DSP2 Clock Divider Value
Ignored if CLKDET_EN = 1
0: 1
1: 1/2 (default)
2: 1/3
3: 1/4
:
127: 1/128
6-0
13.3.31 Page 0: Register 35 (address = 0x23) [reset = 0x03]
Figure 106. Page 0: Register 35
7
RSV
R/W-0b
6
5
4
3
DIV_NUM
R/W-000 0011b
2
Table 57. Page 0: Register 35 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0
Reserved. Do not access.
DIV_NUM
R/W
000 0011b
Set ADC Clock Divider Value
Ignored if CLKDET_EN = 1
0: 1
1: 1/2
2: 1/3
3: 1/4 (default)
:
127: 1/128
6-0
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13.3.32 Page 0: Register 37 (address = 0x25) [reset = 0x07]
CLK_DIV_PLL_SCK is the alternate name for this register.
Figure 107. Page 0: Register 37
7
RSV
R/W-0b
6
5
4
3
DIVNUM
R/W-000 0111b
2
1
0
Table 58. Page 0: Register 37 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0
Reserved. Do not access.
DIV_NUM
R/W
000 0111b
Set PLL SCK Clock Output Divider for SCK Out (when
enabled)
Used in BCK slave mode or master mode where PLL-ed SCK
Out is required. Requires MST_SCK_SRC (0x20) to be
enabled.
Divider value:
0: 1
1: 1/2
2: 1/3
3: 1/4
:
7: 1/8 (default)
:
127: 1/128
6-0
13.3.33 Page 0: Register 38 (address = 0x26) [reset = 0x03]
CLK_DIV_SCK_BCK is the alternate name for this register.
Figure 108. Page 0: Register 38
7
RSV
R/W-0b
6
5
4
3
DIVNUM
R/W-000 0011b
2
1
0
Table 59. Page 0: Register 38 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0
Reserved. Do not access.
DIV_NUM
R/W
000 0011b
Set Master Clock (SCK) to BCK Divider Value
Ratio of master clock (SCK) to bit clock (BCK) in master mode
Divider value:
0: 1
1: 1/2
2: 1/3
3: 1/4 (default)
:
7: 1/8
:
127: 1/128
6-0
108
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.34 Page 0: Register 39 (address = 0x27) [reset = 0x3F]
CLK_DIV_BCK_LRCK is the alternate name for this register.
Figure 109. Page 0: Register 39
7
6
5
4
3
DIV_NUM
R/W-0011 1111b
2
1
0
Table 60. Page 0: Register 39 Field Descriptions
Bit
Field
Type
Reset
7-0
DIV_NUM
R/W
0011 1111b Set Bit Clock (BCK) to LRCK Divider Value
Ratio of bit clock (BCK) to word clock (LRCK) in master mode
Divider value:
0: 1
1: 1/2
2: 1/3
3: 1/4
:
63: 1/64 (default)
:
127: 1/128
:
255: 1/256
Description
13.3.35 Page 0: Register 40 (address = 0x28) [reset = 0x01]
Figure 110. Page 0: Register 40
7
6
RSV
R/W-000b
5
4
LOCK
R/W-0b
3
2
1
PLL_REF_SEL
R/W-0b
RSV
R/W-00b
0
PLL_EN
R/W-1b
Table 61. Page 0: Register 40 Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
000b
Reserved. Do not access.
LOCK
R/W
0b
PLL Lock Status
0: Not locked (default)
1: Locked
4
3-2
RSV
R/W
00b
Reserved. Do not access.
1
PLL_REF_SEL
R/W
0b
PLL Reference Clock Selection
Ignored if CLKDET_EN = 1
0: SCK (default)
1: BCK
0
PLL_EN
R/W
1b
PLL Enable
Ignored if CLKDET_EN = 1
0: Disable
1: Enable (default)
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13.3.36 Page 0: Register 41 (address = 0x29) [reset = 0x00]
Figure 111. Page 0: Register 41
7
RSV
R/W-0b
6
5
4
3
P
R/W-000 0000b
2
1
0
1
0
Table 62. Page 0: Register 41 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
R/W
000 0000b
PLL P Divider Value
Ignored if CLKDET_EN = 1
0: 1 (default)
1: 1/2
2: 1/3
3: 1/4
:
127: 1/128
6-0
13.3.37 Page 0: Register 42 (address = 0x2A) [reset = 0x00]
Figure 112. Page 0: Register 42
7
6
5
4
3
RSV
R/W-0000b
2
R
R/W-0000b
Table 63. Page 0: Register 42 Field Descriptions
110
Bit
Field
Type
Reset
Description
7-4
RSV
R/W
0000b
Reserved. Do not access.
3-0
R
R/W
0000b
PLL R Multiplier Value
Ignored if CLKDET_EN = 1
0: 1 (default)
1: 2
2: 3
3: 4
:
15 16
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.38 Page 0: Register 43 (address = 0x2B) [reset = 0x01]
Figure 113. Page 0: Register 43
7
RSV
R/W-0b
6
5
4
3
J
R/W-000 0001b
2
1
0
Table 64. Page 0: Register 43 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Do not access.
J
R/W
000 0001b
Integer Part of PLL J.D Multiplier Value
Ignored if CLKDET_EN = 1
0: (Prohibit)
1: 1 (default)
2: 2
:
63: 63
6-0
13.3.39 Page 0: Register 44 (address = 0x2C) [reset = 0x00]
Figure 114. Page 0: Register 44
7
6
5
4
3
D_LSB
R/W-0000 0000b
2
1
0
Table 65. Page 0: Register 44 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
D_LSB
R/W
0000 0000b Fractional Part of PLL J.D-Multiplier Value (least significant
bits)
Ignored if CLKDET_EN = 1
0: 0 (default)
1: 1
2: 2
:
9999: 9999 (0x270F for both registers combined)
13.3.40 Page 0: Register 45 (address = 0x2D) [reset = 0x00]
Figure 115. Page 0: Register 45
7
6
5
4
3
RSV
R/W-00b
2
1
0
D_MSB
R/W-00 0000b
Table 66. Page 0: Register 45 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
RSV
R/W
00b
Reserved. Do not access.
5-0
D_MSB
R/W
00 0000b
Fractional Part of PLL J.D Multiplier Value. (most significant
bits, [13:8])
Ignored if CLKDET_EN = 1
0: 0 (default)
1: 1
2: 2
:
9999: 9999 (0x270F for both registers combined)
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13.3.41 Page 0: Register 48 (address = 0x30) [reset = 0x00]
SIGDET_CH_MODE is the alternate name for this register.
Figure 116. Page 0: Register 48
7
CH4R
R/W-0b
6
CH4L
R/W-0b
5
CH3R
R/W-0b
4
CH3L
R/W-0b
3
CH2R
R/W-0b
2
CH2L
R/W-0b
1
CH1R
R/W-0b
0
CH1L
R/W-0b
Table 67. Page 0: Register 48 Field Descriptions
112
Bit
Field
Type
Reset
Description
7
CH4R
R/W
0b
Signal Detection Mode for Channel 4 Right
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
6
CH4L
R/W
0b
Signal Detection Mode for Channel 4 Left
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
5
CH3R
R/W
0b
Signal Detection Mode for Channel 3 Right
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
4
CH3L
R/W
0b
Signal Detection Mode for Channel 3 Left
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
3
CH2R
R/W
0b
Signal Detection Mode for Channel 2 Right
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
2
CH2L
R/W
0b
Signal Detection Mode for Channel 2 Left
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
1
CH1R
R/W
0b
Signal Detection Mode for Channel 1 Right
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
0
CH1L
R/W
0b
Signal Detection Mode for Channel 1 Left
Select the signal detection mode for each channel in SLEEP
mode
0: Audio signal detection (default)
1: DC level-change detection
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13.3.42 Page 0: Register 49 (address = 0x31) [reset = 0x00]
SIGDET_TRIG_MASK is the alternate name for this register.
Figure 117. Page 0: Register 49
7
CH4R
R/W-0b
6
CH4L
R/W-0b
5
CH3R
R/W-0b
4
CH3L
R/W-0b
3
CH2R
R/W-0b
2
CH2L
R/W-0b
1
CH1R
R/W-0b
0
CH1L
R/W-0b
Table 68. Page 0: Register 49 Field Descriptions
Bit
Field
Type
Reset
Description
7
CH4R
R/W
0b
Mask Bits of Interrupt Trigger for Channel 4 Right
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
6
CH4L
R/W
0b
Mask Bits of Interrupt Trigger for Channel 4 Left
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
5
CH3R
R/W
0b
Mask Bits of Interrupt Trigger for Channel 3 Right
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
4
CH3L
R/W
0b
Mask Bits of Interrupt Trigger for Channel 3 Left
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
3
CH2R
R/W
0b
Mask Bits of Interrupt Trigger for Channel 2 Right
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
2
CH2L
R/W
0b
Mask Bits of Interrupt Trigger for Channel 2 Left
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
1
CH1R
R/W
0b
Mask Bits of Interrupt Trigger for Channel 1 Right
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
0
CH1L
R/W
0b
Mask Bits of Interrupt Trigger for Channel 1 Left
All channels are scanned, even if they are masked. Developers
can ignore specific channels and prevent them from generating
interrupts using this register
0: No mask (default)
1: Mask
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13.3.43 Page 0: Register 50 (address = 0x32) [reset = 0x00]
SIGDET_STAT is the alternate name for this register.
Figure 118. Page 0: Register 50
7
CH4R
R/W-0b
6
CH4L
R/W-0b
5
CH3R
R/W-0b
4
CH3L
R/W-0b
3
CH2R
R/W-0b
2
CH2L
R/W-0b
1
CH1R
R/W-0b
0
CH1L
R/W-0b
Table 69. Page 0: Register 50 Field Descriptions
Bit
Field
Type
Reset
Description
7
CH4R
R/W
0b
6
CH4L
R/W
0b
5
CH3R
R/W
0b
4
CH3L
R/W
0b
3
CH2R
R/W
0b
2
CH2L
R/W
0b
1
CH1R
R/W
0b
0
CH1L
R/W
0b
Status of Signal Level Detection in Both Energysense and
Controlsense Modes (read only). Field column indicates
respective channel.
A) In audio signal detection mode:
a) In the active or run state:
0: Signal active
1: Signal lost
b) In the sleep mode
0: Signal lost
1: Signal active
In automatic clipping suppression mode:
0: No change
1: changed DC level
13.3.44 Page 0: Register 51 (address = 0x33) [reset = 0x00]
SIGDET_LOSS_TIME is the alternate name for this register.
Figure 119. Page 0: Register 51
7
6
RSV
R/W-000b
5
4
3
2
TIME
R/W-0 0001b
1
0
Table 70. Page 0: Register 51 Field Descriptions
114
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
000
Reserved. Do not access.
4-0
TIME
R/W
0 0001b
If the signal drops below the threshold on the current audio
input for this set amount of time, the device generates an
interrupt
0: Prohibit
1: 1 minute (default)
2: 2 minutes
3: 3 minutes
:
30: 30 minutes (Max)
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13.3.45 Page 0: Register 52 (address = 0x34) [reset = 0x00]
SIGDET_SCAN_TIME is the alternate name for this register.
Figure 120. Page 0: Register 52
7
6
5
RSV
R/W-0 0000b
4
3
2
1
TIME
R/W-000b
0
Table 71. Page 0: Register 52 Field Descriptions
Bit
Field
Type
Reset
Description
7-33
RSV
R/W
0 0000
Reserved. Do not access.
2-1
TIME
R/W
000
Configures the scan time for each channel in the SLEEP state
000: 160 ms (default)
001: 80 ms
010: 40 ms
011: 20 ms
100: 10 ms
Others: Invalid
13.3.46 Page 0: Register 54 (address = 0x36) [reset = 0x01]
SIGDET_INT_INTVL is the alternate for this register.
Figure 121. Page 0: Register 54
7
RSV
R/W-0b
6
RSV
R/W-0b
5
RSV
R/W-0b
4
RSV
R/W-0b
3
RSV
R/W-0b
2
R/W-0b
1
INT_INTVL
R/W-0b
0
R/W-1b
Table 72. Page 0: Register 54 Field Descriptions
Bit
Field
Type
Reset
Description
7-3
RSV
R/W
0 0000
Reserved. Do not access.
2-0
INT_INTVL
R/W
001b
Interval time of the signal detector interrupt when there is
signal detection. This time value is used for energysense
wakeup from sleep interrupt and from controlsense interrupts
Interval time of the signal-resume interrupt
000: No repeat
001: 1 sec (default)
010: 2 sec
011: 3 sec
100: 4 sec
Others: Invalid
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13.3.47 Page 0: Register 64 (address = 0x40) [reset =0x80]
SIGDET_DC_REF_CH1_L is the alternate name for this register.
Figure 122. Page 0: Register 64
7
6
5
4
3
REF
R/W-1000 0000b
2
1
0
Table 73. Page 0: Register 64 Field Descriptions
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
Description
13.3.48 Page 0: Register 65 (address = 0x41) [reset = 0x7F]
SIGDET_DC_DIFF_CH1_L is the alternate name for this register.
Figure 123. Page 0: Register 65
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 74. Page 0: Register 65 Field Descriptions
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
Description
13.3.49 Page 0: Register 66 (address = 0x42) [reset = 0x00]
SIGDET_DC_LEVEL_CH1_L is the alternate name for this register.
Figure 124. Page 0: Register 66
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 75. Page 0: Register 66 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
LEVEL
R
0000 0000b Current DC Level
13.3.50 Page 0: Register 67 (address = 0x43) [reset = 0x80]
SIGDET_DC_REF_CH1_R is the alternate name for this register.
Figure 125. Page 0: Register 67
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 76. Page 0: Register 67 Field Descriptions
116
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
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Description
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PCM1863, PCM1864, PCM1865
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.51 Page 0: Register 68 (address = 0x44) [reset = 0x7F]
SIGDET_DC_DIFF_CH1_R is the alternate name for this register.
Figure 126. Page 0: Register 68
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 77. Page 0: Register 68 Field Descriptions
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
Description
13.3.52 Page 0: Register 69 (address = 0x45) [reset = 0x00]
SIGDET_DC_LEVEL_CH 1_R is the alternate name for this register.
Figure 127. Page 0: Register 69
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 78. Page 0: Register 69 Field Descriptions
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
Description
13.3.53 Page 0: Register 70 (address = 0x46) [reset = 0x80]
SIGDET_DC_REF_CH2_L is the alternate name for this register.
Figure 128. Page 0: Register 70
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 79. Page 0: Register 70 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
13.3.54 Page 0: Register 71 (address = 0x47) [reset = 0x7F]
SIGDET_DC_DIFF_CH2_L is the alternate name for this register.
Figure 129. Page 0: Register 71
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 80. Page 0: Register 71 Field Descriptions
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
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Description
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13.3.55 Page 0: Register 72 (address = 0x48) [reset = 0x00]
SIGDET_DC_LEVEL_CH2_L is the alternate name for this register.
Figure 130. Page 0: Register 72
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 81. Page 0: Register 72 Field Descriptions
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
Description
13.3.56 Page 0: Register 73 (address = 0x49) [reset = 0x80]
SIGDET_DC_REF_CH2_R is the alternate name for this register.
Figure 131. Page 0: Register 73
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 82. Page 0: Register 73 Field Descriptions
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
Description
13.3.57 Page 0: Register 74 (address = 0x4A) [reset = 0x7F]
SIGDET_DC_DIFF_CH2_R is the alternate name for this register.
Figure 132. Page 0: Register 74
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 83. Page 0: Register 74 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
13.3.58 Page 0: Register 75 (address = 0x4B) [reset = 0x00]
SIGDET_DC_LEVEL_CH 2_R is the alternate name for this register.
Figure 133. Page 0: Register 75
7
6
5
4
3
2
1
0
LEVEL
R-0000 0000b
Table 84. Page 0: Register 75 Field Descriptions
118
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
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Description
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.59 Page 0: Register 76 (address = 0x4C) [reset = 0x80]
SIGDET_DC_REF_CH3_L is the alternate name for this register.
Figure 134. Page 0: Register 76
7
6
5
4
3
REF
R/W-1000 0000b
2
1
0
Table 85. Page 0: Register 76 Field Descriptions
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
Description
13.3.60 Page 0: Register 77 (address = 0x4D) [reset = 0x7F]
SIGDET_DC_DIFF_CH3_L is the alternate name for this register.
Figure 135. Page 0: Register 77
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 86. Page 0: Register 77 Field Descriptions
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
Description
13.3.61 Page 0: Register 78 (address = 0x4E) [reset = 0x00]
SIGDET_DC_LEVEL_CH3_L is the alternate name for this register.
Figure 136. Page 0: Register 78
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 87. Page 0: Register 78 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
LEVEL
R
0000 0000b Current DC Level
13.3.62 Page 0: Register 79 (address = 0x4F) [reset = 0x80]
SIGDET_DC_REF_CH3_R is the alternate name for this register.
Figure 137. Page 0: Register 79
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 88. Page 0: Register 79 Field Descriptions
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
Copyright © 2014–2018, Texas Instruments Incorporated
Description
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13.3.63 Page 0: Register 80 (address = 0x50) [reset = 0x7F]
SIGDET_DC_DIFF_CH3_R is the alternate name for this register.
Figure 138. Page 0: Register 80
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 89. Page 0: Register 80 Field Descriptions
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
Description
13.3.64 Page 0: Register 81 (address = 0x51) [reset = 0x00]
SIGDET_DC_LEVEL_CH3_R is the alternate name for this register.
Figure 139. Page 0: Register 81
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 90. Page 0: Register 81 Field Descriptions
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
Description
13.3.65 Page 0: Register 82 (address = 0x52) [reset = 0x80]
SIGDET_DC_REF_CH4_L is the alternate name for this register.
Figure 140. Page 0: Register 82
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 91. Page 0: Register 82 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
13.3.66 Page 0: Register 83 (address = 0x53) [reset = 0x7F]
SIGDET_DC_DIFF_CH4_L is the alternate name for this register.
Figure 141. Page 0: Register 83
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 92. Page 0: Register 83 Field Descriptions
120
Bit
Field
Type
Reset
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
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Description
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PCM1863, PCM1864, PCM1865
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.67 Page 0: Register 84 (address = 0x54) [reset = 0x00]
SIGDET_DC_LEVEL_CH4_L is the alternate name for this register.
Figure 142. Page 0: Register 84
7
6
5
4
3
2
1
0
1
0
LEVEL
R-0000 0000b
Table 93. Page 0: Register 84 Field Descriptions
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
Description
13.3.68 Page 0: Register 85 (address = 0x55) [reset = 0x80]
SIGDET_DC_REF_CH4_R is the alternate name for this register.
Figure 143. Page 0: Register 82
7
6
5
4
3
REF
R/W-1000 0000b
2
Table 94. Page 0: Register 85 Field Descriptions
Bit
Field
Type
Reset
7-0
REF
R/W
1000 0000b Reference Level of Controlsense Detection
Description
13.3.69 Page 0: Register 86 (address = 0x56) [reset = 0x7F]
SIGDET_DC_DIFF_CH4_R is the alternate name for this register.
Figure 144. Page 0: Register 86
7
6
5
4
3
DIFF
R/W-0111 1111b
2
1
0
Table 95. Page 0: Register 86 Field Descriptions
Bit
Field
Type
Reset
Description
7-0
DIFF
R/W
0111 1111b Difference Level of Controlsense Detection
13.3.70 Page 0: Register 87 (address = 0x57) [reset = 0x00]
Figure 145. Page 0: Register 84
7
6
5
4
3
2
1
0
LEVEL
R-0000 0000b
Table 96. Page 0: Register 87 Field Descriptions
Bit
Field
Type
Reset
7-0
LEVEL
R
0000 0000b Current DC Level
Copyright © 2014–2018, Texas Instruments Incorporated
Description
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13.3.71 Page 0: Register 88 (address = 0x58) [reset = 0x00]
AUXADC_DATA_CTRL is the alternate name for this register.
Figure 146. Page 0: Register 88
7
6
5
DC_NOLATCH
AUXADC_RDY
DC_RDY
R/W-0b
R/W-0b
R/W-0b
4
AUXADC_LAT
CH
R/W-0b
3
AUXADC_DAT
A_TYPE
R/W-0b
2
1
0
DC_CH
R/W-000b
Table 97. Page 0: Register 88 Field Descriptions
Bit
Field
Type
Reset
Description
7
DC_NOLATCH
R/W
0b
Read Without Latch
Read directly without latch operation (from secondary ADC)
0: With latch operation (default)
1: Without latch operation when read dc value
6
AUXADC_RDY
R/W
0b
AUXADC Ready
Indicate latch operation is finished and AUXADC value is ready
for read operation.
0: Latch operation is running (default)
1: AUXADC value is ready for read operation
5
DC_RDY
R/W
0b
DC Ready
Indicate latch operation is finished and dc value is ready.
0: Latch operation is running (default)
1: DC value is ready for read operation
4
AUXADC_LATCH
R/W
0b
AUXADC Latch
Trigger to latch 16-bit AUXADC value for read operation: rising
edge is the trigger signal
0: Idle (default)
1: Latch the value for read operation
3
AUXADC_DATA_TYPE
R/W
0b
Data to be Read From Control Interface
0: read LPF data (default)
1: read HPF data
DC_CH[2:0]
R/W
000b
DC-Value Channel Select
Select dc-value channel to be latched for control-interface read
operation
000: CH1_L (default)
001: CH1_R
010: CH2_L
011: CH2_R
100: CH3_L
101: CH3_R
110: CH4_L
111: CH4_R
2-0
13.3.72 Page 0: Register 89 (address = 0x59) [reset = 0x00]
Figure 147. Page 0: Register 89
7
6
5
4
3
AUXADC_DATA_LSB
R-0000 0000b
2
1
0
Table 98. Page 0: Register 89 Field Descriptions
122
Bit
Field
Type
Reset
7-0
AUXADC_DATA_LSB
R
0000 0000b Low Byte of Secondary ADC Output
The data depends on AUXADC_DATA_TYPE setting
AUXADC_DATA_TYPE = 0: reading LPF of secondary ADC
AUXADC_DATA_TYPE = 1: reading HPF of secondary ADC
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Description
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13.3.73 Page 0: Register 90 (address = 0x5A) [reset = 0x00]
Figure 148. Page 0: Register 90
7
6
5
4
3
AUXADC_DATA_MSB
R-0000 0000b
2
1
0
Table 99. Page 0: Register 90 Field Descriptions
Bit
Field
Type
Reset
7-0
AUXADC_DATA_MSB
R
0000 0000b High Byte of Secondary ADC Output [15:8]
The data depends on AUXADC_DATA_TYPE setting
AUXADC_DATA_TYPE = 0: reading LPF of secondary ADC
AUXADC_DATA_TYPE = 1: reading HPF of secondary ADC
Description
13.3.74 Page 0: Register 96 (address = 0x60) [reset = 0x01]
Figure 149. Page 0: Register 96
7
6
RSV
R/W-000b
5
4
POSTPGA_CP
R/W-0b
3
RSV
R/W-0b
2
DC_CHANG
R/W-0b
1
DIN_TOGGLE
R/W-0b
0
ENGSTR
R/W-1b
Table 100. Page 0: Register 96 Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
000b
Reserved. Always write 000b.
4
POSTPGA_CP
R/W
0b
Enable the Post-PGA Clipping Interrupt
Write 0 to clear interrupts, all bits in this register
0: Disable (default)
1: Enable
3
RSV
R/W
0b
Reserved. Always write 0b.
2
DC_CHANG
R/W
0b
Enable the DC Level Change Interrupt
0: Disable (default)
1: Enable
1
DIN_TOGGLE
R/W
0b
Enable I2S RX DIN toggle Interrupt
0: Disable (default)
1: Enable
0
ENGSTR
R/W
1b
Enable the energysense Interrupt
0: Disable
1: Enable (default)
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13.3.75 Page 0: Register 97 (address = 0x61) [reset = 0x00]
Figure 150. Page 0: Register 97
7
6
RSV
R-000b
5
4
POSTPGA_CP
R-0b
3
RSV
R-0b
2
DC_CHANG
R-0b
1
DIN_TOGGLE
R-0b
0
ENGSTR
R-0b
Table 101. Page 0: Register 97 Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RSV
R
000b
Reserved. Always write 000b.
4
POSTPGA_CP
R
0b
Status of Post-PGA Clipping Interrupt
Write 0 to register 0x60 clear interrupts, all bits in this register
0: None
1: Interrupt occurred
3
RSV
R
0b
Reserved. Always write 0b.
2
DC_CHANG
R
0b
Status of the DC Level Change Interrupt
0: None
1: Interrupt occurred
1
DIN_TOGGLE
R
0b
Status of I2S RX DIN toggle Interrupt
0: None
1: Interrupt occurred
0
ENGSTR
R
0b
Status of the energysense Interrupt
0: None
1: Interrupt occurred
13.3.76 Page 0: Register 98 (address = 0x62) [reset =0x10]
Figure 151. Page 0: Register 98
7
6
5
RSV
R/W-00b
4
3
POL
R/W-01b
2
1
RSV
R/W-00b
0
WIDTH
R/W-00b
Table 102. Page 0: Register 98 Field Descriptions
124
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
00b
Reserved. Always write 00b.
5-4
POL
R/W
01b
Polarity of the Interrupt Pulse
00: Low active
01: High active (default)
10: Open drain (L-Active)
11: Reserved
3-2
RSV
R/W
00b
Reserved. Always write 00b.
1-0
WIDTH
R/W
00b
Width of the Interrupt Pulse
00: 1 ms (default)
01: 2 ms
10: 3 ms
11: Infinity for level sense
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13.3.77 Page 0: Register 112 (address = 0x70) [reset = 0x70]
Figure 152. Page 0: Register 112
7
6
5
RSV
R/W-0 1110b
4
3
2
PWRDN
R/W-0b
1
SLEEP
R/W-0b
0
STBY
R/W-0b
Table 103. Page 0: Register 112 Field Descriptions
Bit
Field
Type
Reset
Description
7-3
RSV
R/w
0 1110b
Reserved. Always write 0 1110b
2
PWRDN
R/W
0b
Enter Analog Power Down State
0: Power Up (default)
1: Power Down
1
SLEEP
R/W
0b
Enter the Device Sleep State
After the chip enters SLEEP state, energysense application will
be triggered.
0: Power Up (default)
1: Sleep
0
STBY
R/W
0b
Enter Digital Standby State
0: Run (default)
1: Standby
13.3.78 Page 0: Register 113 (address = 0x71) [reset = 0x10]
DSP_CTRL is the alternate name for this register.
Figure 153. Page 0: Register 113
7
2CH
R/W-0b
6
RSV
R/W-0b
5
FLT
R/W-0b
4
HPF_EN
R/W-1b
3
MUTE_CH2_R
R/W-0b
2
MUTE_CH2_L
R/W-0b
1
MUTE_CH1_R
R/W-0b
0
MUTE_CH1_L
R/W-0b
Table 104. Page 0: Register 113 Field Descriptions
Bit
Field
Type
Reset
Description
7
2CH
R/W
0b
Processing Mode Selection
Select the processing mode for 4-channel device only. This
configuration CANNOT be changed on the fly in RUN state.
0: 4 channels (default)
1: 2 channels
6
RSV
R/W
0b
Reserved. Always write 0b.
5
FLT
R/W
0b
Select Decimation Filter Type
0: Normal (default)
1: Short latency
4
HPF_EN
R/W
1b
Enable High-Pass Filter
0: Disable
1: Enable (default)
3
MUTE_CH2_R
R/W
0b
Mute Ch2(R)
0: Unmute (default)
1: Mute
2
MUTE_CH2_L
R/W
0b
Mute Ch2(L)
0: Unmute (default)
1: Mute
1
MUTE_CH1_R
R/W
0b
Mute Ch1(R)
0: Unmute (default)
1: Mute
0
MUTE_CH1_L
R/W
0b
Mute Ch1(L)
0: Unmute (default)
1: Mute
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13.3.79 Page 0: Register 114 (address = 0x72) [reset = 0x00]
Figure 154. Page 0: Register 114
7
6
5
4
3
2
RSV
R-0000b
1
0
1
INFO
R-000b
0
STATE
R-0000b
Table 105. Page 0: Register 114 Field Descriptions
Bit
Field
Type
Reset
Description
7-4
RSV
R
0000b
Reserved. Always write 0000b.
3-0
STATE
R
0000b
Device Current Status
0000: Power down (default)
0001: Wait clock stable
0010: Release reset
0011: Stand-by
0100: Fade IN
0101: Fade OUT
0110: Reserved
0111: Reserved
1000: Reserved
1001: Sleep
1010: Reserved
1011: Reserved
1100: Reserved
1101: Reserved
1110: Reserved
1111: Run
13.3.80 Page 0: Register 115 (address = 0x73) [reset = 0x00]
Figure 155. Page 0: Register 115
7
6
5
RSV
R-0 0000b
4
3
2
Table 106. Page 0: Register 115 Field Descriptions
126
Bit
Field
Type
Reset
Description
7-3
RSV
R
0 0000b
Reserved. Always write 0 0000b.
2-0
INFO
R
000b
Current Sampling Frequency
000: Out of range (Low) or LRCK Halt (default)
001: 8 kHz
010: 16 kHz
011: 32 khz to 48 kHz
100: 88.2 kHz to 96 kHz
101: 176.4 kHz to 192 kHz
110: Out of range (High)
111: Invalid fS
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SLAS831D – MARCH 2014 – REVISED MARCH 2018
13.3.81 Page 0: Register 116 (address = 0x74) [reset = 0x00]
Figure 156. Page 0: Register 116
7
RSV
R-0b
6
5
BCK_RATIO
R-000b
4
3
RSV
R-0b
2
1
SCK_RATIO
R-000b
0
Table 107. Page 0: Register 116 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R
0b
Reserved. Always write 0 0000b.
BCK_RATIO
R
000b
Current Receiving BCK Ratio
Default value: 000 (default)
000: Out of range (L) or BCK Halt
001: 32
010: 48
011: 64
100: 256
101: (Not assigned)
110: Out of range (H)
111: Invalid BCK ratio or LRCK Halt
RSV
R
0b
Reserved. Always write 0 0000b.
SCK_RATIO
R
000b
Current SCK Ratio
000: Out of range (L) or SCK Halt (default)
001: 128
010: 256
011: 384
100: 512
101: 768
110: Out of range (H)
111: Invalid SCK ratio or LRCK Halt
6-4
3
2-0
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13.3.82 Page 0: Register 117 (address = 0x75) [reset = 0x00]
CLK_ERR_STAT is the alternate name for this register.
Figure 157. Page 0: Register 117
7
RSV
R-0b
6
LRCKHLT
R-0b
5
BCKHLT
R-0b
4
SCKHTL
R-0b
3
RSV
R-0b
2
LRCKERR
R-0b
1
BCKERR
R-0b
0
SCKERR
R-0b
1
AVDD
R/W-0b
0
LDO
R/W-0b
Table 108. Page 0: Register 117 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R
0b
Reserved. Always write 0b.
6
LRCKHLT
R
0b
LRCK Halt Status
0: No Error (default)
1: Halt
5
BCKHLT
R
0b
BCK Halt Status
0: No Error (default)
1: Halt
4
SCKHTL
R
0b
SCK Halt Status
0: No Error (default)
1: Halt
3
RSV
R
0b
Reserved. Always write 0b.
2
LRCKERR
R
0b
LRCK Error Status
0: No Error (default)
1: Error
1
BCKERR
R
0b
BCK Error Status
0: No Error (default)
1: Error
0
SCKERR
R
0b
SCK Error Status
0: No Error (default)
1: Error
13.3.83 Page 0: Register 120 (address = 0x78) [reset = 0x00]
Figure 158. Page 0: Register 120
7
6
5
RSV
R/W-0b
4
3
2
DVDD
R/W-0b
Table 109. Page 0: Register 120 Field Descriptions
128
Bit
Field
Type
Reset
Description
7-3
RSV
R
0 0000b
Reserved. Always write 0 0000b.
2
DVDD
R
0b
DVDD Status
0:Bad or Missing (default)
1:Good
1
AVDD
R
0b
AVDD Status
0:Bad or issing (default)
1:Good
0
LDO
R
0b
Digital LDO Status
0:Bad or Missing (default)
1:Good
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13.4
SLAS831D – MARCH 2014 – REVISED MARCH 2018
Page 1 Registers
13.4.1 Page 1: Register 1 (address = 0x01) [reset = 0x00]
Figure 159. Page 1: Register 1
7
6
RSV
R/W-000b
5
4
DONE
R-0b
3
RSV
R/W-0b
2
BUSY
R-0b
1
R_REQ
R/W-0b
0
W_REQ
R/W-0b
Table 110. Page 1: Register 1 Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
000b
Reserved. Always write 000b.
4
DONE
R
0b
Done Status Flag
1: Write or read operation is done with one cycle as indicator
0: Idle or is busy (default)
3
RSV
R/W
0b
Reserved. Always write 000b.
2
BUSY
R
0b
Busy Status Flag
1: Write or read operation is running and not finished
0: Write or read operation is finished (default)
1
R_REQ
R/W
0b
Memory Mapper Register Access to DSP-2 - READ
1: Request read operation
0: The read operation is done and data is ready to read from
I2C/SPI interface (default)
0
W_REQ
R/W
0b
Memory Mapper Register Access to DSP-2 - WRITE
1: Request write operation
0: The write operation is done and is ready for next write
operation command (default)
13.4.2 Page 1: Register 2 (address = 0x02) [reset = 0x00]
Figure 160. Page 1: Register 2
7
RSV
R/W-0b
6
5
4
3
MEM_ADDR
R/W-000 0000b
2
1
0
Table 111. Page 1: Register 2 Field Descriptions
Bit
Field
Type
Reset
Description
7
RSV
R/W
0b
Reserved. Always write 0b.
MEM_ADDR
R/W
000 0000b
Memory Mapped Register Address
Status of the memory mapped register access
6-0
13.4.3 Page 1: Register 4 (address = 0x04) [reset = 0x00]
Figure 161. Page 1: Register 4
7
6
5
4
3
MEM_WDATA_0
R/W-0000 0000b
2
1
0
Table 112. Page 1: Register 4 Field Descriptions
Bit
Field
Type
Reset
7-0
MEM_WDATA_0
R/W
0000 0000b Write Data to 24-Bit Memory
Coefficient [23:16]
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Description
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13.4.4 Page 1: Register 5 (address = 0x05) [reset = 0x00]
Figure 162. Page 1: Register 5
7
6
5
4
3
MEM_WDATA_1
R/W-0000 0000b
2
1
0
1
0
1
0
1
0
Table 113. Page 1: Register 5 Field Descriptions
Bit
Field
Type
Reset
7-0
MEM_WDATA_1
R/W
0000 0000b Write Data to 24-Bit Memory
Coefficient [15:8]
Description
13.4.5 Page 1: Register 6 (address = 0x06) [reset = 0x00]
Figure 163. Page 1: Register 6
7
6
5
4
3
MEM_WDATA_2
R/W-0000 0000b
2
Table 114. Page 1: Register 6 Field Descriptions
Bit
Field
Type
Reset
7-0
MEM_WDATA_2
R/W
0000 0000b Write Data to 24-Bit Memory
Coefficient [7:0]
Description
13.4.6 Page 1: Register 7 (address = 0x07) [reset = 0x00]
Figure 164. Page 1: Register 7
7
MEM_WDATA_
3
R/W-0b
6
5
4
3
RSV
2
R/W-000 0000b
Table 115. Page 1: Register 7 Field Descriptions
Bit
7
6-0
Field
Type
Reset
Description
MEM_WDATA_2
R/W
0b
Write Data to 24-Bit Memory
Reserved
RSV
R/W
000 0000b
Reserved. Always write 000 0000b.
13.4.7 Page 1: Register 8 (address = 0x08) [reset = 0x00]
Figure 165. Page 1: Register 8
7
6
5
4
3
MEM_RDATA_0
R-0000 0000b
2
Table 116. Page 1: Register 8 Field Descriptions
130
Bit
Field
Type
Reset
7-0
MEM_RDATA_0
R
0000 0000b Read Data from 24-Bit Memory
Coefficient [23:16]
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Description
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13.4.8 Page 1: Register 9 (address = 0x09) [reset = 0x00]
Figure 166. Page 1: Register 9
7
6
5
4
3
MEM_RDATA_1
R-0000 0000b
2
1
0
1
0
1
0
Table 117. Page 1: Register 9 Field Descriptions
Bit
Field
Type
Reset
7-0
MEM_RDATA_1
R
0000 0000b Read Data from 24-Bit Memory
Coefficient [15:8]
Description
13.4.9 Page 1: Register 10 (address = 0x0A) [reset = 0x00]
Figure 167. Page 1: Register 10
7
6
5
4
3
MEM_RDATA_2
R-0000 0000b
2
Table 118. Page 1: Register 10 Field Descriptions
Bit
Field
Type
Reset
7-0
MEM_RDATA_2
R
0000 0000b Read Data from 24-Bit Memory
Coefficient [7:0]
Description
13.4.10 Page 1: Register 11 (address = 0x0B) [reset = 0x00]
Figure 168. Page 1: Register 11
7
MEM_RDATA_
3
R/W-0b
6
5
4
3
RSV
2
R/W-000 0000b
Table 119. Page 1: Register 11 Field Descriptions
Bit
7
6-0
Field
Type
Reset
Description
MEM_RDATA_3
R
0b
Read Data from 24-Bit Memory
Reserved
RSV
R/W
000 0000b
Reserved. Always write 000 0000b.
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13.5
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Page 3 Registers
13.5.1 Page 3: Register 18 (address = 0x12) [reset =0x40]
Figure 169. Page 3: Register 18
7
6
5
4
RSV
R/W-010 0000b
3
2
1
0
PD
R/W-0b
1
0
PDZ
W-1b
Table 120. Page 3: Register 18 Field Descriptions
Bit
Field
Type
Reset
Description
7-1
RSV
R/W
010 0000b
Reserved. Always write 010 0000b
PD
R/W
0b
Oscillator Power Down Control
0: Power up (default)
1: Power down
0
13.5.2 Page 3: Register 21 (address = 0x15) [reset = 0x01]
Figure 170. Page 3: Register 21
7
6
RSV
R/W-000b
5
4
TERM
W-0b
3
2
RSV
R/W-000b
Table 121. Page 3: Register 21 Field Descriptions
Bit
Field
Type
Reset
Description
7-5
RSV
R/W
000b
Reserved. Always write 000b.
TERM
W
0b
Mic Bias Resistor Bypass (Write only)
0: Disable (default)
1: Enable
3-1
RSV
R/W
000b
Reserved. Always write 000b.
0
PDZ
W
0b
Mic Bias Control (Write only)
0: Power down
1: Power up (default)
4
132
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13.6
SLAS831D – MARCH 2014 – REVISED MARCH 2018
Page 253 Registers
13.6.1 Page 253: Register 20 (address = 0x14) [reset = 0x00]
Figure 171. Page 253: Register 20
7
6
PGA_ICI
R/W-00b
5
4
3
2
1
REF_ICI
R/W-00b
0
RSV
R/W-0000b
Table 122. Page 253: Register 20 Field Descriptions
Bit
Field
Type
Reset
Description
7-6
PGA_ICI
R/W
00b
PGA Bias Current Trim
00: 100% (default)
01: Reserved
10: 75%
11: Reserved
5-4
REF_ICI
R/W
00b
Global bias current trim
00: 100% (default)
01: 75%
10: Reserved
11: Reserved
3-0
RSV
R/W
0000b
Reserved. Always write 0000b.
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Product Folder Links: PCM1860 PCM1861 PCM1862 PCM1863 PCM1864 PCM1865
133
PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
SLAS831D – MARCH 2014 – REVISED MARCH 2018
www.ti.com
14 Device and Documentation Support
14.1 Documentation Support
14.1.1 Related Documentation
PCM186x EVM User's Guide
14.2 Related Links
Table 123 lists quick access links. Categories include technical documents, support and community resources,
tools and software, and quick access to order now.
Table 123. Related Links
PARTS
PRODUCT FOLDER
ORDER NOW
TECHNICAL
DOCUMENTS
TOOLS &
SOFTWARE
SUPPORT &
COMMUNITY
PCM1860
Click here
Click here
Click here
Click here
Click here
PCM1861
Click here
Click here
Click here
Click here
Click here
PCM1862
Click here
Click here
Click here
Click here
Click here
PCM1863
Click here
Click here
Click here
Click here
Click here
PCM1864
Click here
Click here
Click here
Click here
Click here
PCM1865
Click here
Click here
Click here
Click here
Click here
14.3 Receiving Notification of Documentation Updates
To receive notification of documentation updates, navigate to the device product folder on ti.com. In the upper
right corner, click on Alert me to register and receive a weekly digest of any product information that has
changed. For change details, review the revision history included in any revised document.
14.4 Community Resources
The following links connect to TI community resources. Linked contents are provided "AS IS" by the respective
contributors. They do not constitute TI specifications and do not necessarily reflect TI's views; see TI's Terms of
Use.
TI E2E™ Online Community TI's Engineer-to-Engineer (E2E) Community. Created to foster collaboration
among engineers. At e2e.ti.com, you can ask questions, share knowledge, explore ideas and help
solve problems with fellow engineers.
Design Support TI's Design Support Quickly find helpful E2E forums along with design support tools and
contact information for technical support.
14.5 Trademarks
E2E is a trademark of Texas Instruments.
Bluetooth is a registered trademark of Bluetooth SIG, Inc..
All other trademarks are the property of their respective owners.
14.6 Electrostatic Discharge Caution
This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling and installation procedures can cause damage.
ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more
susceptible to damage because very small parametric changes could cause the device not to meet its published specifications.
14.7 Glossary
SLYZ022 — TI Glossary.
This glossary lists and explains terms, acronyms, and definitions.
134
Submit Documentation Feedback
Copyright © 2014–2018, Texas Instruments Incorporated
Product Folder Links: PCM1860 PCM1861 PCM1862 PCM1863 PCM1864 PCM1865
PCM1860, PCM1861, PCM1862
PCM1863, PCM1864, PCM1865
www.ti.com
SLAS831D – MARCH 2014 – REVISED MARCH 2018
15 Mechanical, Packaging, and Orderable Information
The following pages include mechanical, packaging, and orderable information. This information is the most
current data available for the designated devices. This data is subject to change without notice and revision of
this document. For browser-based versions of this data sheet, refer to the left-hand navigation.
Copyright © 2014–2018, Texas Instruments Incorporated
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Product Folder Links: PCM1860 PCM1861 PCM1862 PCM1863 PCM1864 PCM1865
135
PACKAGE OPTION ADDENDUM
www.ti.com
10-Dec-2020
PACKAGING INFORMATION
Orderable Device
Status
(1)
Package Type Package Pins Package
Drawing
Qty
Eco Plan
(2)
Lead finish/
Ball material
MSL Peak Temp
Op Temp (°C)
Device Marking
(3)
(4/5)
(6)
PCM1860DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1860
PCM1860DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1860
PCM1861DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1861
PCM1861DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1861
PCM1862DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1862
PCM1862DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1862
PCM1863DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1863
PCM1863DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1863
PCM1864DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1864
PCM1864DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1864
PCM1865DBT
ACTIVE
TSSOP
DBT
30
60
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1865
PCM1865DBTR
ACTIVE
TSSOP
DBT
30
2000
RoHS & Green
NIPDAU
Level-2-260C-1 YEAR
-40 to 125
PCM1865
(1)
The marketing status values are defined as follows:
ACTIVE: Product device recommended for new designs.
LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect.
NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design.
PREVIEW: Device has been announced but is not in production. Samples may or may not be available.
OBSOLETE: TI has discontinued the production of the device.
(2)
RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance
do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may
reference these types of products as "Pb-Free".
RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption.
Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of
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