AT73C246-EK1 Evaluation Kit
....................................................................................................................
User Guide
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AT73C246-EK1 Evaluation Kit User Guide
Section 1
Introduction .................................................................................................................1-1
1.1
Scope ................................................................................................................................. 1-1
1.1.1
Typical Applications: ............................................................................................ 1-1
1.2
AT73C246-EK1 Features................................................................................................... 1-2
1.3
Deliverables ....................................................................................................................... 1-3
Section 2
Getting Started............................................................................................................2-1
2.1
Electrostatic Warning ......................................................................................................... 2-1
2.2
Requirements..................................................................................................................... 2-1
2.3
PC System Requirements.................................................................................................. 2-1
2.4
Instructions......................................................................................................................... 2-2
2.4.1
To start the AT73C246-EK1 board (before using the AT73C246-EK1 software) 2-2
2.4.2
To turn off the AT73C246-EK1 evaluation board................................................. 2-2
2.5
Block Diagram.................................................................................................................... 2-3
2.6
Power Supply ..................................................................................................................... 2-4
2.7
Communication Interfaces ................................................................................................. 2-5
2.7.1
Communication Interfaces Header (J15) ............................................................. 2-5
2.8
Audio Interfaces ................................................................................................................. 2-6
2.9
Output Voltages ................................................................................................................. 2-7
2.10 Input/Output Signals........................................................................................................... 2-8
2.10.1 ADC ..................................................................................................................... 2-8
2.10.2 CLK32K - RTC Output Clock ............................................................................... 2-8
2.10.3 LED ...................................................................................................................... 2-8
2.10.4 Wakeup Push Buttons ......................................................................................... 2-9
2.10.5 LDOs Optional Programming Enable .................................................................. 2-9
Section 3
AT73C246-EK1 Software Interface ............................................................................3-1
3.1
Software Panel................................................................................................................... 3-1
3.1.1
Login .................................................................................................................... 3-1
3.1.2
Login Errors ......................................................................................................... 3-1
3.1.3
Functionality and Control Pages .......................................................................... 3-3
Section 4
USB-to-Serial Card .....................................................................................................4-1
4.1
USB-to-Serial Card Features ............................................................................................. 4-1
4.2
Electrostatic Warning ......................................................................................................... 4-1
4.3
Requirements..................................................................................................................... 4-1
4.4
Instructions......................................................................................................................... 4-2
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4.4.1
To start the USB-to-Serial Card (after software installation)................................ 4-2
4.4.2
To turn off the USB-to-Serial Card....................................................................... 4-2
4.5
Identification LEDs ............................................................................................................. 4-2
4.6
Serial Interfaces Header .................................................................................................... 4-3
Section 5
Technical Specifications .............................................................................................5-1
5.1
AT73C246-EK1 .................................................................................................................. 5-1
Section 6
PCB Layout.................................................................................................................6-1
6.1
AT73C246-EK1 .................................................................................................................. 6-1
Section 7
Schematics .................................................................................................................7-1
Section 8
Revision History..........................................................................................................8-1
8.1
Revision History ................................................................................................................. 8-1
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AT73C246-EK1 Evaluation Kit User Guide
Section 1
Introduction
Congratulations on your purchase of the AT73C246-EK1. It is designed to give designers a quick start to
evaluate the power management and audio capability of the AT73C246 and for prototyping and testing
of new designs.
1.1
Scope
This document describes the AT73C246-EK1. This board is designed to allow an easy evaluation of the
products using demonstration software.
To increase its capabilities for demonstration, this standalone board has two serial interfaces (TWI and
I²S via a dedicated connector), Manual Startup/Reset Control, Input/Audio Connectors, 4 x ADC Inputs,
RTC and Output Supply Voltages Terminals.
This user guide acts as a general getting started guide as well as a complete technical reference for
advanced users.
This document refers the AT73C246 datasheet.
1.1.1
Typical Applications:
Portable devices
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1.2
AT73C246-EK1 Features
The AT73C246-EK1 provides the following features:
Small size (only 70 x 70mm) with maximum available features.
Input power supply:
– External Power Supply on VIn pad (2.5V to 5.5V).
On-board audio/analog resources:
– 100dB Dynamic Range Stereo Audio DAC - 8 to 96 kHz sampling frequency,
– 4 x 96dB Dynamic Range Stereo Audio ADC - 8 to 96 kHz sampling frequency,
– 1 stereo 16/32 Ohm/20mW stereo headset (3.5mm jack connector),
– 1 stereo line in (3.5mm jack connector),
– 1 auxiliary in (3.5mm jack connector),
– 1 stereo line output (3.5mm jack connector),
– Stereo microphone inputs with bias generator,
On-board power supply resources:
– DCDC0 : 0.8 - 3.6V / 600mA,
– DCDC1 : 0.8 - 3.6V / 600mA,
– LDO2 : 0.8 - 1.9V / 300mA,
– LDO3 : 2.7 - 3.6V / 200mA,
– LDO4 : 2.7 - 3.6V / 200mA,
– LDO5 : 2.5V / 10mA - Backup battery charger and RTC supply,
Serial interfaces:
– TWI for PMU and Audio controls,
– I²S Master / Slave protocol support (for audio streaming),
RTC 32KHz output for host support.
Reset and Interrupt generation.
On-board buttons:
– Power Enable (PWREN),
– Hard Reset (HRST),
– Wakeup Sequence (WAKEUP0).
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1.3
Deliverables
The AT73C246-EK1 package contains the following items:
1. An AT73C246-EK1 board,
Figure 1-1.
AT73C246-EK1 Top View (card photo)
The AT73C246 is located in the center of the AT73C246-EK1 on the Components Side.
2. USB Interface card,
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3. USB cable,
4. 20-pins flat cable,
5. One CD-ROM containing the product’s user guide, full datasheet and ready to use GUI and Command line applications.
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Figure 1-2.
AT73C246-EK1 Components Side
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AT73C246-EK1 Evaluation Kit User Guide
Section 2
Getting Started
2.1
Electrostatic Warning
The AT73C246-EK1 evaluation board is shipped in protective anti-static packaging. The board must not
be subjected to high electrostatic potentials. A grounding strap or similar protective device should be
connected when handling the board. Avoid touching the components pins or any metallic element.
2.2
Requirements
In order to set up the AT73C246-EK1 evaluation kit the following items are needed:
1. The AT73C246-EK1 evaluation board itself.
2. A DC 2.9V to 5.5V, connected to Vin pad, output power source for main supply (minimum 1 A are
required for fully operation).
3. The USB interface card with its USB cable and 20-pins flat cable.
4. Input/Output devices (Headset, Microphone, etc)
5. PC station with a USB connection (i.e. Universal Serial Bus) for command communication (via USB
interface card).
2.3
PC System Requirements
For a correct software operation of the AT73C246-EK1 evaluation board, the minimum hardware and
software PC requirements are:
Intel Pentium II processor
64 MB RAM
70 MB free hard disk space (for AT73C246 Evaluation board software installation)
Windows® 2000/XP/VISTA
A USB connection.
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2.4
Instructions
2.4.1
To start the AT73C246-EK1 board (before using the AT73C246-EK1 software)
2.4.2
Install the AT73C246 software by clicking on setup.exe.
If the software is downloaded from the Atmel Web site then it is necessary to install first the National
Instrument Labview software (LabVIEW8.0.1RuntimeEngine).
Connect Input and Output devices to the AT73C246-EK1 board (into linein, Headset, Microphone,
etc..) as in Section 2.8 ”Audio Interfaces” on page 2-6,
Connect DC power supply on P1 and P2.
Connect the USB cable between the PC and the USB Interface card and when the PC requests an
“inf” driver point to “CompositeCDCSerial.inf” in USB Driver folder,
Connect the 20-pins flat cable between the to USB Interface card header and the AT73C246-EK1
board.
Launch the AT73C246 software test interface by clicking on AT73C246.exe (and follow instructions in
“AT73C246-EK1 Software Interface” on page 3-1 and “USB-to-Serial Card” on page 4-1)
Push once on PWREN button (the AT73C246-EK1 on-board “LED (D1)” should blink)
To turn off the AT73C246-EK1 evaluation board
Disconnect the 20-pins flat cable,
Disconnect the power supply on P1 and P2.
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2.5
Block Diagram
Figure 2-1.
AT73C246-EK1 Block Diagram
AT73C246-EK1
AT73C246
Mic In R
Mic In L
VIN
Aux In
AUDIO
CODEC
Line Out
TWI
From Extended
Card or
Microcontroller
20 Pins
Header
Line In
Headset
Out
I²S
CLK32K
RSTB
ITB
LED
ADC
0 to 4
WAKEUP0
HRST
PWREN
AT73C246-EK1 Evaluation Kit User Guide
POWER MANAGMENT
4 Pins
Header
BUCK 0
VDD0
BUCK 1
VDD1
LDO 2
VDD2
LDO 3
VDD3
LDO 4
VDD4
LDO 5
VBACKUP
LDO 6
VDDC
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2.6
Power Supply
The AT73C246-EK1 is supplied by an external power supply connected on P1 (positive supply) and P2
(ground).
Figure 2-2.
Power Supply Diagram
AT73C246-EK1
AT73C246
POWER MANAGMENT
VIN
Min 1A for
fully operation
P1
P2
BUCK 0
VDD0
BUCK 1
VDD1
LDO 2
VDD2
WAKEUP0
LDO 3
VDD3
HRST
LDO 4
VDD4
AGND
VDD0
VBACKUP
VBACKUP
LDO 5
PWREN
LDO 6
VDDC
.
Table 2-1. Electrical Supply Requirements
Power supply source
Min
Max
Unit
On P1 pad (minimum 1 A for fully operation)
3.1
5.5
V
Note:
Figure 2-3.
This power supply input is NOT protected against polarization inversion.
Vin Supply Pad (P1 & P2)
G1
P1
P2
Connect the power supply (+) to P1 and the ground (-) to P2.
Note:
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Keep G1 soldered to insure connection between the AGND (analog ground on P2) and
DGND (digital ground).
AT73C246-EK1 Evaluation Kit User Guide
2.7
Communication Interfaces
2.7.1
Communication Interfaces Header (J15)
The following table details the pin assignments for each signal. All signal, I²S or TWI, are processed by
the USB-to-Serial module. If needed the user can drive directly these signals (using a microcontroller for
example) trough J15.
Table 2-2. Communication Interface Header Pins Assigning
Pin N°
Signal Name
Description
Pin N°
Signal Name
Description
1
WAKEUP3
-
2
Vin
Not Used
3
WAKEUP2
-
4
DGND
Digital Ground
5
WAKEUP1
-
6
-
Not Used
7
RSTB
Component Reset
8
DGND
Digital Ground
9
TWCK
TWI Clock
10
VDDIO
I/O level
11
LRFS-Signal
I²S Frame Clock
12
MCLK
I²S Master Clock
13
DAI-Signal
I²S Data in
14
ITB
Interrupt
15
DAO-Signal
I²S Data out
16
-
Not Used
17
BCLK-Signal
I²S Bit Clock
18
-
Not Used
19
-
Not Used
20
TWD
TWI Data I\O
Figure 2-4.
Communication Interfaces Header (J15)
J15
Note:
19
1
20
2
For a reason of I/O level configuration between the AT73C246 and an external microcontroller and If using another interface then the USB Communication Box, the VDD3 or VDD0
should be connect on J15 by soldering a 0 ohms resistor on its pads (see VPAD Selection
“AT73C246-EK1 Schematic - Power Supply Page” on page 7-5).
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2.8
Audio Interfaces
The AT73C246-EK1 CODEC interface contains various connections of audio elements:
Microphones Inputs connected to J5 and J6 (2 pins header for each input).
Auxiliary Input connected to J4 (3.5mm jack).
Line Input connected to J3 (3.5mm jack).
Line Output connected to J2 (3.5mm jack).
Headset Output connected to J1(3.5mm jack).
Please consult the product data sheet for setup options and requirements.
Figure 2-5.
Microphones Inputs (J5 and J6)
Microphone
Left Input
Microphone
Right Input
Figure 2-6.
Audio Inputs and Outputs (J1, J2, J3 and J4)
Auxiliary
Input
Line Input
Line Output
Headset
Output
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2.9
Output Voltages
In order to measure the output voltages connect a Volt-meter probe to the requested Test-Point by the
following list:
VDD0 - J8; 0.8 - 3.6V / 600mA
VDD1 - J9; 0.8 - 3.6V / 600mA
VDD2 - J12; 0.8 - 1.9V / 300mA
VDD3 - J13; 2.7 - 3.6V / 200mA
VDD4 - J19; 2.7 - 3.6V / 200mA
VBACKUP - J10; 2.5V / 10mA (an additional connector J11 is available for rechargeable coin type
battery)
Figure 2-7.
Output Voltages Test-Points (J8, J8, J12, J13, J19)
VDD4
VDD3
VDD2
VDD1
VDD0
Figure 2-8.
VBACKUP and VCOIN (J10 and J11)
VBACKUP
VCOIN
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2.10
Input/Output Signals
2.10.1
ADC
Connect an external analog signal to ADC connector J14.
Figure 2-9.
ADC connector (J14)
ADC 0 to 3
2.10.2
CLK32K - RTC Output Clock
The AT73C246-EK1 provides measuring the internal oscillator frequency (J7).
Figure 2-10. CLK32K (J7)
RTC Output
Clock
2.10.3
LED
The programmable output LED pin can be visualize by the on board led (D1).
Figure 2-11. LED (D1)
Led
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AT73C246-EK1 Evaluation Kit User Guide
2.10.4
Wakeup Push Buttons
The AT73C246-EK1 provides 3 on board wakeup push buttons for startup/shutdown operations.
HRST - Pressing it for 1 second reset the AT73C246 (when the AT73C246 in “ON”).
PWREN - Pressing it for 5 sec start/stop the AT73C246.
WAKEUP0 - Pressing it once enable the sequence in PMU_WAKEUP_EVENMENT register. On the
other hand, when the AT73C246 in “ON”, pressing it for 1 second switch the AT73C246 into standby
mode.
Figure 2-12. Wakeup Push Buttons (SW2, SW3 and SW4)
HRST
2.10.5
PWREN
WAKEUP0
LDOs Optional Programming Enable
Close J20 before any access to the state machine LDOs startup sequences.
Programming
Jumper
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Section 3
AT73C246-EK1 Software Interface
3.1
Software Panel
3.1.1
Login
1. Connect the USB cable to the USB Interface card and check which COM it uses. Go to Device Manager in the Control Panel of your computer and then look for “AT91 USB to Serial Converter” title in
PORTS.
2. On setup panel - Select Port and required operation: Init AT73C246 for initializing card or Exit
program.
Figure 3-1.
Login Message
Communication
port selection
Operation
selection
3.1.2
Login Errors
USB Communication Issue
In software startup - In case of “Communication Issue” check USB cable connectivity and/or COM
selection.
Then, select Retry or Exit.
Figure 3-2.
Communication Error
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USB Connection Issue
While software runs - In case of “Connection Issue” check USB cable connectivity.
Then, select Retry or Exit.
Figure 3-3.
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Connection Issue
AT73C246-EK1 Evaluation Kit User Guide
3.1.3
Functionality and Control Pages
AT startup (after pressing on WAKEUP button) the user can choose to initialize by clicking on “Example
Init_audio” button (the initialization can be done manually or programmed by microcontroller). This action
will startup the following elements:
Audio Codec - for this example the first path is chosen - “Digital In - Headphone Out”.
Power Management Unit
Blinking Led
Figure 3-4.
Software Panel - General Purpose
Serial port OK
Product “OFF”
Serial port OK
Product “ON”
Serial port not connected
Product off (no connection)
Read Registers
Command
Audio Initialisation
(Demonstration example)
Registers
Table
ADC Sampling
Period
ADC Function
Sampling
Elements
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Figure 3-5.
Software Panel - Audio Configuration
Path
Select
Codec
Standby
Codec
On/Off
Codec
Configuration
I²S Configuration
Figure 3-6.
Software Panel - Audio Input-Output
Audio Input
Control
Audio Output
Control
Audio Input
Mixer
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Headphone Plug
In-Out Detector
AT73C246-EK1 Evaluation Kit User Guide
Figure 3-7.
Software Panel - Audio Effect & Microphone
Mono
Control
ADC/DAC
Control
3D Effect
Microphone
Control
De-emphasis
Filter
Headphone
Tone Control
Figure 3-8.
Software Panel - Audio Volume
Path Mute
Microphone
Volume
AT73C246-EK1 Evaluation Kit User Guide
Sidetone
Line
Gain
Headphone
Volume
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Figure 3-9.
Software Panel - Power Management
Standby
Setup
Wakeup
Events
Wakeup
Trig
Product Off
(In order to startup
press PWREN button)
Standby Command
(Product will wakeup according
to requestsevents with elements
marked in blue)
VDD4
Control
Output Voltage
VDD3
Control
VDD2
Control
Working Mode
On/Off Command
VDD0 Control VDD1 Control
Led Control
Figure 3-10. Software Panel - Register Mapping
Read
Command
Write
Command
Data
Write
Data
Read
Register
Address
Registers
Access
Registers
Table
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Section 4
USB-to-Serial Card
The USB-to-Serial Card provides computer terminals to communicate with all PMAAC product line.
It gives designers all necessary for a quick setup of an evaluation card and it supports different product’s
software.
To increase its capabilities for demonstration, this standalone board has 3 serial interfaces (I²S, TWI and
SPI).
4.1
USB-to-Serial Card Features
The USB-to-Serial Card provides the following features:
On-board resources:
– Standard USB interface,
– 20 leads GPIO connector,
– 12.288MHz Clock output for digital core,
Serial interfaces:
– Bidirectional buffered USB to SPI
– Bidirectional buffered USB to TWI
– Bidirectional buffered USB to I²S
On-board indication leds:
– Power “ON”
– Data transmitting
4.2
Electrostatic Warning
The USB-to-Serial Card evaluation board is shipped in protective plastic packaging. The board must not
be subjected to high electrostatic potentials. Avoid touching the components pins or any metallic
element.
4.3
Requirements
In order to set up the USB-to-Serial Card the following items are needed:
1. The USB-to-Serial Card itself.
2. PC station with a standard USB connector.
3. The 20-leads flat cable.
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4.4
Instructions
4.4.1
To start the USB-to-Serial Card (after software installation)
4.4.2
Connect the USB cable to the USB-to-Serial Card and verify led color is green and constant,
Connect the 20-pins flat cable between the to USB-to-Serial Card and the evaluation board.
Once the USB-to-Serial Card properly installed; it should operate transparently - as if it were a
standard cable connection. There is no ON/OFF switch and all data signals from and to the PC are
passed straight through.
To turn off the USB-to-Serial Card
Disconnect the USB cable.
Figure 4-1.
USB Side
USB Connector
Figure 4-2.
4.5
GPIO Side
Pin N°19
Pin N°1
Pin N°20
Pin N°2
Identification LEDs
The bi color LED indentify the following statuses:
– Continuous Green - Power “ON”
– Blinking Red - Data transmitting
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4.6
Serial Interfaces Header
The USB-to-Serial Card supports I²S, SPI and TWI protocols which configured automatically by the software. The following table details the pins assigning for each signal on the GPIO connector (2x10 pins
header Type HE10 for flat cable).
Note:
In most cases, a clock must run during any I²S, SPI or TWI write access. In any case of not
using the Serial Board and connecting an external communication system for I²S, SPI or
TWI a clock should be provided to the supported evaluation card.
Table 4-1. Serial Interface Header Pins Assigning
Pin N°
1
Signal Name
Description
(1)
Pin N°
Signal Name
Description
MOSI
SPI Data out
2
ADJ_VOUT
Not Used
3
SPCK
(1)
4
GND
Ground(4)
5
NPCS1
SPI Chip Select 1(1)
6
+3V3
Not Used
7
NPCS0
(1)
8
GND
Ground(4)
9
TWCK
TWI CLK(1)
10
Vin_VDDIO
Input supply from supported
card(2)
11
LRFS
I²S Frame Clock(1)
12
MCLK
12.288MHz Output clock for
supported digital core(1)(5)
13
SDIN_Codec
I²S Data in(2)
SPI CLK
SPI Chip Select 0
I²S Data out
14
IRQ
Interrupt Request
(1)
16
nRST_in
Reset in(2)
15
SDOUT_Codec
17
BCLK_Codec
I²S Bit Clock(1)
18
MISO
SPI Data in(2)
19
AD4
Not Used
20
TWD
TWI Data(3)
Notes: 1. An output signal from USB-to-Serial Card to supported card.
2. An input signal from supported card to USB-to-Serial Card.
3. A Bi-dirctional signal.
4. Ground - These pins must be connected between the USB-to-Serial Card and the supported board.
5. 12.288 MHz Clock - The USB-to-Serial Card’s oscillator provides a 12.288MHz clock
(+3.3V p-p via pin 12). This clock is necessary for driving the digital core of the evaluated board.
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AT73C246-EK1 Evaluation Kit User Guide
Section 5
Technical Specifications
5.1
AT73C246-EK1
System Unit: AT73C246-EK1
– Physical Dimensions............................................................................................ L= 70 x W=70 x H=20 mm
– Weight.........................................................................................................................................................70 g
Operating Conditions
– External Voltage Supply (on Vin Pad)........................................................................................... 2.9V - 5.5V
Connections
– Communication Connector (for I²S and TWI)....................................................................2x10 pins Header
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AT73C246-EK1 Evaluation Kit User Guide
Section 6
PCB Layout
6.1
AT73C246-EK1
Figure 6-1.
Note:
Layer 1 - Components Layer
Size not to scale
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Figure 6-2.
Note:
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Layer 2
Size not to scale
AT73C246-EK1 Evaluation Kit User Guide
Figure 6-3.
Note:
Layer 3
Size not to scale
AT73C246-EK1 Evaluation Kit User Guide
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Figure 6-4.
Note:
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Layer 4 - Print Side
Size not to scale
AT73C246-EK1 Evaluation Kit User Guide
Figure 6-5.
Silk Screen
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Section 7
Schematics
Figure 7-1.
AT73C246-EK1 Schematic - Main Page
AT73C246-EK1 Evaluation Kit User Guide
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Figure 7-2.
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AT73C246-EK1 Schematic - AT73C246 Page
AT73C246-EK1 Evaluation Kit User Guide
Figure 7-3.
AT73C246-EK1 Schematic - Audio Interface Page
AT73C246-EK1 Evaluation Kit User Guide
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Figure 7-4.
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AT73C246-EK1 Schematic - Digital Interface Page
AT73C246-EK1 Evaluation Kit User Guide
Figure 7-5.
AT73C246-EK1 Schematic - Power Supply Page
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Section 8
Revision History
8.1
Revision History
Table 8-1. Revision History
Doc. Rev
Date
11047A
08-Apr-10
AT73C246-EK1 Evaluation Kit User Guide
Comments
Change
Request
Ref.
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