LMX9820A
LMX9820A Bluetooth Serial Port Module
Literature Number: SNOSAF5J
LMX9820A
Bluetooth® Serial Port Module
Based on National’s CompactRISC™ 16-bit processor
architecture and Digital Smart Radio technology, the
The National Semiconductor LMX9820A Bluetooth Serial LMX9820A is optimized to handle the data and link manPort module is a highly integrated radio, baseband control- agement processing requirements of a Bluetooth node.
ler, and memory device implemented on an FR4 substrate. The firmware supplied with this device offers a complete
All hardware and firmware is included to provide a com- Bluetooth (v1.1) stack including profiles and command
plete solution from antenna from the complete lower and interface. This firmware features point-to-point and pointupper layers of the Bluetooth stack, up to the application to-multipoint link management supporting data rates up to
support layers including the Generic Access Profile (GAP), the theoretical maximum over RFComm of 704 kbps. The
the Service Discovery Application Profile (SDAP), and the internal memory supports up to three active Bluetooth data
Serial Port Profile (SPP). The module includes a config- links and one active SCO link.
urable service database to fulfill service requests for additional profiles on the host. The LMX9820A features a small
1.1 APPLICATIONS
form factor (10.1 x 14.1 x 2.0 mm) design, which solves
many of the challenges associated with compact system ■ Personal Digital Assistants
integration. Moreover, the LMX9820A is pre-qualified as a
Bluetooth Integrated Component. Conformance testing ■ POS Terminals
through the Bluetooth qualification program enables a fast
■ Data Logging Systems
time to market after system integration by ensuring a high
degree of compliance and interoperability.
■ Audio Gateway applications
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1.0 General Description
2.0 Functional Block Diagram
FIRMWARE
LINK
MGMNT
PROCESSOR
(LMP)
(INCLUDES
UART
PROFILES AND
COMMAND
UART_RX
UART_TX
UART_RTS#
UART_CTS#
ANTENNA
O
INTERFACE)
LNA
TR
SW
IOVCC
TX_SWITCH_P
ENV0
AUX
DIGITAL
BASEBAND
SMART
CONTROLLER
PORTS
COMPACTRISC™
CORE
RADIO
PA
SYNTHESIZER
FLASH
RAM
ADVANCED
AUDIO INTERFACE
INTERFACE
SELECT
JTAG
VOLTAGE
ANALOG
REGULATORS
DIGITAL
ENV1
LSTAT_0
LSTAT_1
HOST_WU
RESET_B#
RESET_5100#
ISEL1
ISEL2
VDD_ANA_OUT
VDD_DIG_OUT
VDD_DIG_PWR_D#
CRYSTAL/OSCILLATOR
AAI_STD
AAI_SFS
AAI_SRD
AAI_SCLK
VCC
DIG_GND[1:2]
CompactRISC is a trademark of National Semiconductor Corporation.
Bluetooth is a registered trademark of Bluetooth SIG, Inc. and is used under license by National Semiconductor.
© 2007 National Semiconductor Corporation
www.national.com
LMX9820A Bluetooth Serial Port Module
February 2007
■
■
■
■
– File Transfer Protocol (FTP)
– Object Push Profile (OPP)
– Headset (HSP)
– Handsfree Profile (HFP)
■ On-chip application support including:
– Command Interface:
– Link setup and configuration (also Multipoint)
– Configuration of the module
– In-System Programming (ISP)
– Service database modifications
– Default connections
– UART Transparent mode
– Different Operation modes:
– Automatic mode
– Command mode
Bluetooth version 1.1 qualified
Implemented in CMOS technology on FR4 substrate
Temperature Range: -40°C to +85°C
FCC certified on LMX9820ADONGLE,
FCC ID ED9LMX9820ASM
3.1 DIGITAL HARDWARE
■ Baseband and Link Management processors
■ CompactRISC Core
■ Integrated Memory:
– Flash
– RAM
■ UART Command/Data Port:
– Support for up to 921.6k baud rate
■ Auxiliary Host Interface Ports:
– Link Status
– Transceiver Status (Tx or Rx)
– Operating Environment Control:
– Default Bluetooth mode
– In System Programming (ISP) mode
■ Advanced Power Management (APM) features
■ Advanced Audio Interface for external PCM codec
e
■ Accepts external clock or crystal input:
– 12 MHz
– 20 ppm cumulative clock error required for Bluetooth
– Secondary 32.768kHz oscillator for low-power
modes.
■ Synthesizer:
– Integrated VCO and loop filter
– Provides all clocking for radio and baseband functions
■ Antenna Port (50 ohms nominal impedance):
– Embedded front-end filter for enhanced out of band
performance
■ Integrated transmit/receive switch (full-duplex operation
via antenna port)
■ Typical -81 dBm input sensitivity
■ 0 dBm typical output power
et
3.2 FIRMWARE
3.3 DIGITAL SMART RADIO
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■ Complete Bluetooth Stack including:
– Baseband and Link Manager
– L2CAP, RFCOMM, SDP
– Profiles:
– GAP
– SDAP
– SPP
■ Additional Profile support on host for any SPP based
profile, like
– Dial Up Networking (DUN)
– Facsimile Profile (FAX)
3.4 PHYSICAL DIMENSIONS
■ Compact size: 10.1mm x 14.1mm x 2.0mm
■ Complete system interface provided in Land Grid Array
on underside for surface-mount assembly
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LMX9820A
3.0 Features
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2
2.0
3.0
4.0
5.0
6.0
9.0
10.0
11.0
12.0
System Power-Up Sequence . . . . . . . . . . . . . . . . . . .
Integrated Firmware . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1 FEATURES . . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.1 Operation Modes . . . . . . . . . . . . . . . . . . . . . .
10.1.2 Default Connections . . . . . . . . . . . . . . . . . . . .
10.1.3 Event Filter . . . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.4 Default Link Policy . . . . . . . . . . . . . . . . . . . . .
10.1.5 Audio Support . . . . . . . . . . . . . . . . . . . . . . . . .
10.1.6 Default Sniff operation . . . . . . . . . . . . . . . . . .
Power Reduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.1 LOW POWER MODES . . . . . . . . . . . . . . . . . . . .
11.2 UART TRANSPORT LAYER CONTROL . . . . . .
11.2.1 Hardware Wake-Up Functionality . . . . . . . . . .
11.2.2 Disabling the UART Transport Layer . . . . . . .
11.2.3 LMX9820A Enabling the UART Interface . . . .
11.2.4 Enabling the UART Transport Layer from Host
Command Interface . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1 FRAMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1.1 Start and End Delimiters . . . . . . . . . . . . . . . . .
12.1.2 Packet Type ID . . . . . . . . . . . . . . . . . . . . . . . .
12.1.3 Opcode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1.4 Data Length . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1.5 Checksum . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.2 COMMAND SET OVERVIEW . . . . . . . . . . . . . .
Usage Scenarios . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1 SCENARIO 1: POINT-TO-POINT
CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . .
13.2 SCENARIO 2: AUTOMATIC POINT-TO-POINT
CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . .
13.3 SCENARIO 3: POINT-TO-MULTIPOINT
CONNECTION . . . . . . . . . . . . . . . . . . . . . . . . . .
Application Information . . . . . . . . . . . . . . . . . . . . . . .
14.1 MATCHING NETWORK . . . . . . . . . . . . . . . . . . .
14.2 FILTERED POWER SUPPLY . . . . . . . . . . . . . . .
14.3 HOST INTERFACE . . . . . . . . . . . . . . . . . . . . . .
14.4 CLOCK INPUT . . . . . . . . . . . . . . . . . . . . . . . . . .
14.5 SCHEMATIC AND LAYOUT EXAMPLES . . . . .
Reference design . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Datasheet Revision History . . . . . . . . . . . . . . . . . . . .
Physical Dimension . . . . . . . . . . . . . . . . . . . . . . . . . .
et
7.0
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1
APPLICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.1
DIGITAL HARDWARE . . . . . . . . . . . . . . . . . . . . . . 2
3.2
FIRMWARE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
3.3
DIGITAL SMART RADIO . . . . . . . . . . . . . . . . . . . . 2
3.4
PHYSICAL DIMENSIONS . . . . . . . . . . . . . . . . . . . 2
Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Pad Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1
GENERAL SPECIFICATIONS . . . . . . . . . . . . . . . . 8
6.2
DC CHARACTERISTICS . . . . . . . . . . . . . . . . . . . 10
6.3
RF PERFORMANCE CHARACTERISTICS . . . . 11
6.4
PERFORMANCE DATA (TYPICAL) . . . . . . . . . . 13
Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1
BASEBAND AND LINK MANAGEMENT
PROCESSORS . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1.1 Bluetooth Lower Link Controller . . . . . . . . . . . . 15
7.1.2 Bluetooth Upper Layer Stack . . . . . . . . . . . . . . 15
7.1.3 Profile Support . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.1.4 Application with Command Interface . . . . . . . . 15
7.2
MEMORY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7.3
CONTROL AND TRANSPORT PORT . . . . . . . . . 15
7.4
AUXILIARY PORTS . . . . . . . . . . . . . . . . . . . . . . . 15
7.4.1 Reset_5100 and Reset_b# . . . . . . . . . . . . . . . 15
7.4.2 Operating Environment Pads (Env0 and Env1) 15
7.4.3 Interface Select Inputs (ISEL1, ISEL2) . . . . . . 16
7.4.4 Module and LInk Status Outputs . . . . . . . . . . . 16
7.5
AUDIO PORT . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Digital Smart Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.1
FUNCTIONAL DESCRIPTION . . . . . . . . . . . . . . 17
8.2
RECEIVER FRONT END . . . . . . . . . . . . . . . . . . . 17
8.2.1 Poly-Phase Bandpass Filter . . . . . . . . . . . . . . . 17
8.2.2 Hard Limiter and RSSI . . . . . . . . . . . . . . . . . . . 17
8.3
RECEIVER BACK END . . . . . . . . . . . . . . . . . . . . 17
8.3.1 Frequency Discriminator . . . . . . . . . . . . . . . . . 17
8.3.2 Post-Detection Filter and Equalizer . . . . . . . . . 17
8.4
AUTOTUNING CIRCUITRY . . . . . . . . . . . . . . . . . 17
8.5
SYNTHESIZER . . . . . . . . . . . . . . . . . . . . . . . . . . 17
8.5.1 Phase-Frequency Detector . . . . . . . . . . . . . . . 17
8.6
TRANSMITTER CIRCUITRY . . . . . . . . . . . . . . . . 18
8.6.1 IQ-DA Converters and TX Mixers . . . . . . . . . . 18
8.7
CRYSTAL REQUIREMENTS . . . . . . . . . . . . . . . 18
8.7.1 Crystal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8.7.2 TCXO (Temperature Compensated Crystal
Oscillator) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
8.7.3 Optional 32 kHz Oscillator . . . . . . . . . . . . . . . . 21
8.7.4 ESR (Equivalent Series Resistance) . . . . . . . . 22
8.8
ANTENNA MATCHING AND FRONT-END
FILTERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
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1.0
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14.0
15.0
16.0
17.0
18.0
32
33
34
35
35
35
35
35
35
39
40
42
45
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8.0
13.0
23
24
24
24
24
24
24
24
24
25
25
26
26
26
26
26
27
27
27
27
27
27
27
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LMX9820A
Table of Contents
1
2
3
4
5
6
7
8
9
10
11
12
13
NC
NC
NC
NC
NC
NC
NC
PI1_
RF_CE_TP11
NC
Tx_rx_
synch
CCB_
Clock
BBCLK
PI2_TP12
NC
RF GND
RF GND
RF GND
RF GND
RF GND
RF GND
Clk-
Clk+
AAI_srd
Env1
AAI_std
32kHz_CLKI
NC
RF GND
RF GND
RF GND
RF GND
RF GND
RF GND
Tx_rx_
data
Uart_rx
Uart_rts#
AAI_sfs
AAI_sclk
32kHz_CLKO
NC
RF GND
RF GND
RF GND
RF GND
RF GND
RF GND
CCB_data
Uart_tx
Uart_cts#
Reset_
5100#
Dig_gnd_1
NC
RF GND
RF GND
RF GND
RF GND
RF GND
RF GND
NC
RF GND
RF GND
RF GND
RF GND
NC
RF GND
RF GND
RF GND
RF GND
A
B
C
E
H
NC
J
NC
Env0
J_rdy
RF GND
RF GND
Lstat_1
Host_wu
J_tdi
RF GND
NC
Reset_b#
J_tms
J_tck
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G
Lstat_0
VCC
TX_
Switch_P
VDD_ANA_OUT NC
NC
RF GND
USB_D+
RF GND
RF GND
VDD_DIG_OUT NC
VDD_DIG_PWR_D#
RF_inout
NC
J_tdo
RF GND
RF GND
IOVCC
ISEL2
NC
NC
NC
CCB_
latch
ISEL1
Table 1. Ordering Information
Spec
Shipment Method
LMX9820ASM
Tape & Reel 153 pcs
LMX9820ASMX
Tape & Reel 1000 pcs
LMX9820ASM
NOPB
Tape & Reel 153 pcs
LMX9820ASMX
NOPB
Tape & Reel 1000 pcs
4
USB_VCC PH3_TP9
RF GND
Figure 1. Connection Diagram
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NC
Dig_gnd_2 USB_Gnd PH2_TP8
X-Ray (Top View)
Order Number
USB_D-
NC
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LMX9820A
4.0 Connection Diagram
LMX9820A
5.0 Pad Descriptions
Table 2. System Interface Signals
Pad
Location
Direction
Description
Clk-
B8
Input
Xtal g or Negative Clock Input. Typically connected along with
XTAL_D to an external surface-mount AT-cut crystal. Leave not connected in case Clk+ is connected to external crystal oscillator.
Clk+
B9
Input
Xtal d or Positive Clock Input. Typically connected along with
XTAL_G to an external surface-mount AT-cut crystal. Can also be configured as a frequency input when using an external crystal oscillator.
When configured as a frequency input, typically connected to an external Temperature Compensated Crystal Oscillator (TCXO) through an
Alternating Current (AC) coupling capacitor.
32kHz_CLKI
B13
Input
32 kHz Clock input. If not used connect to ground.
32kHz_CLKO
C13
Output
RF_inout
H8
Input/Output
ISEL2
H13
Input
Module Interface Select Input Bit 1
ISEL1
J13
Input
Module Interface Select Input Bit 0
32 kHz Clock Output. If not used then treat as no connect.
e
RF Antenna Port. 50Ω nominal impedance. Typically connected to an
antenna through a 6.8 pF capacitor.
et
Pad Name
Table 3. USB Interface Signals (not supported by LMX9820A firmware)
USB_VCC
USB_D+
USB_DUSB_Gnd
Direction
F12
Input
E11
Input/Output
USB Data Positive 1
E12
Input/Output
USB Data Negative 1
G12
Input
Description
USB Transceiver Power Supply + 1
USB Transceiver Ground. Connect to GND.
Treat as no connect. Pad required for mechanical stability.
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1.
Pad
Location
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Pad Name
Table 4. UART Interface Signals
Pad
Location
Direction
Uart_tx
D9
Output
UART Host Control Interface Transport, Transmit Data
Uart_rx
C9
Input
UART Host Control Interface Transport, Receive Data
Uart_rts#
C10
Output
Uart_cts#
D10
Input
Pad Name
1.
2.
Description
UART Host Control Interface Transport, Request to Send 1
UART Host Control Interface Transport, Clear to Send 2
Treat as no connect if not used. Pad required for mechanical stability.
Connect GND if not used.
Table 5. Auxiliary Ports Interface Signals
Pad Name
IOVCC
Pad
Location
Direction
H12
Input
Description
2.85V to 3.6V Logic Threshold Program Input.
5
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Table 5. Auxiliary Ports Interface Signals (Continued)
Pad
Location
Direction
Reset_b#
G8
Input
Reset for Smart Radio. Connect to Reset_5100.
Reset_5100#
D11
Input
Reset for Baseband processor. Low active, either connect to host or
use pull-up with max. 1KΩ resistor.
Lstat_0
E8
Output
Link Status Bit 0
Lstat_1
F8
Output
Link Status Bit 1
Host_wu
F9
Output
Host Wakeup
Env0
E9
Input
Module Operating Environment Bit 0
Env1
B11
Input
Module Operating Environment Bit 1
TX_Switch_P
H3
Output
Description
Transceiver Status. 0 = Receive; 1 = Transmit.
e
Pad Name
Table 6. Audio Port Interface Signals
Pad
Location
Direction
AAI_srd
B10
Input
AAI_std
B12
Output
AAI_sfs
C11
Input/Output
Advanced Audio Interface Frame Synchronization 1
AAI_sclk
C12
Input/Output
Advanced Audio Interface Clock 1
1.
et
Description
Advanced Audio Interface Receive Data Input 1
Advanced Audio Interface Transmit Data Output 1
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ol
Pad Name
Treat as no connect if not used. Pad required for mechanical stability.
Table 7. Test Interface Signals
Pad Name
J_rdy
J_tdi
J_tdo
J_tms
Pad
Location
Direction
E10
Output
F10
Input
JTAG Test Data 1
F11
Input/Output
JTAG Test Data 1
G9
Input/Output
JTAG Test Mode Select 1
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LMX9820A
5.0 Pad Descriptions (Continued)
J_tck
Description
JTAG Ready 1
JTAG Test Clock 1
G10
Input
PI1_RFCE_TP11
A8
Test Pin
Module Test Point 1
PI2_TP12
A13
Test Pin
Module Test Point 1
Tx_rx_data
C8
Test Pin
Module Test Point 1
Tx_rx_synch
A10
Test Pin
Module Test Point 1
CCB_Clock
A11
Test Pin
Module Test Point 1
CCB_data
D8
Test Pin
Module Test Point 1
CCB_latch
J12
Test Pin
Module Test Point 1
BBCLK
A12
Test Pin
Module Test Point 1
PH3_TP9
F13
Test Pin
Module Test Point 1
PH2_TP8
G13
Test Pin
Module Test Point 1
1.
Treat as no connect. Pad required for mechanical stability.
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6
LMX9820A
5.0 Pad Descriptions (Continued)
Table 8. Power, Ground, and No Connect Signals
Pad Name
Pad
Location
Direction
Description
NC
A1, A2, A3, A4, A5,
A6, A7, A9, B1, C1,
D1, D13, E1, E13,
F1, G1, G7, H1, J1,
J3, J6, J7, J9, J10,
J11
No Connect
RF GND 1
B2, B3, B4, B5, B6,
B7, C2, C3, C4, C5,
C6, C7, D2, D3, D4,
D5, D6, D7, E2, E3,
E4, E5, E6, E7, F2,
F3, F4, F5, F6, F7,
G2, G3, G4, G5,
G6, H4, H5, H6, H7,
H9, H10, H11
Input
Radio System Ground. Must be connected to RF
Ground plane. Thermal relief required for proper soldering.
Dig_gnd_1 1
D12
Input
Digital Ground
Dig_gnd_2 1
G11
Input
Digital Ground
VDD_ANA_OUT
J2
Input
2.85V to 3.6V Input for Internal Power Supply Regulators
Output
VDD_DIG_OUT
J5
Output
VDD_DIG_PWR_D#
J4
Input
Voltage Regulator Output/Power Supply for Analog
Circuitry. If not used, place pad and do not connect to
VCC or Ground.
Voltage Regulator Output/Power Supply for Digital
Circuitry. If not used, place pad and do not connect to
VCC or Ground.
Power Down for the Internal Power Supply Regulator
for the Digital Circuitry. Place pad and do not connect to
VCC or Ground.
Connect RF GND, Dig_gnd_1, and Dig_gnd_2 to a single ground plane.
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1.
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H2
bs
ol
VCC
No Connect. Pad required for mechanical stability.
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The following conditions apply unless otherwise stated in
the tables below:
6.1 GENERAL SPECIFICATIONS
• TA = -40°C to +85°C
Absolute Maximum Ratings (see Table 9) indicate limits
beyond which damage to the device may occur. Operating
Ratings (see Table 10) indicate conditions for which the
device is intended to be functional.
• VCC = 3.3V, IOVCC = 3.3V
• RF system performance specifications are guaranteed
on National Semiconductor Austin Board rev1.0b reference design platform.
This device is a high performance RF integrated circuit and
is ESD sensitive. Handling and assembly of this device
should be performed at ESD free workstations.
Table 9. Absolute Maximum Ratings
Symbol
Parameter
Min
Max
Unit
Core Logic Power Supply Voltage
-0.3
4.0
V
IOVCC
I/O Power Supply Voltage
-0.3
4.0
V
USB_VCC1
USB Power Supply Voltage
-0.5
3.63
V
VI
Voltage on any pad with GND = 0V
-0.5
3.6
V
PinRF
RF Input Power
TS
Storage Temperature Range
TL
Lead Temperature (solder 4 sec)
ESD-HBM
ESD, Human Body Model
ESD-MM
ESD, Machine Model
ESD-CDM
ESD, Charged Device Model
e
VCC
+15
dBm
+125
oC
+235
oC
2000 2
V
200
V
et
-65
V
3
tR
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ol
1000
TO
Operating Temperature Range
-40
+85
°C
HUMOP
Humidity (operating, across operating
temperature range)
10
90
%
HUMNONOP
Humidity (non-operating, 38.7oC web bulb
temperature)
5
95
%
1.
2.
3.
USB Interface not supported by LMX9820A firmware. Treat as no connect. Pad required for mechanical stability.
Antenna pin passes 1500V HBM.
BRCLK(A12) pin passes 500V CDM.
Table 10. Recommended Operating Conditions1
Symbol
VCC
3
IOVCC4
Min
Typ2
Max
Unit
Module Power Supply Voltage
2.85
3.3
3.6
V
I/O Power Supply Voltage
2.85
3.3
3.6
V
50
ms
Parameter
Module Power Supply Rise Time
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LMX9820A
6.0 Electrical Specifications
1.
2.
3.
4.
Maximum voltage difference allowed between VCC and IOVCC is 500 mV.
Typical operating conditions are VCC = 3.3V, IOVCC = 3.3V operating voltage and 25°C ambient temperature.
VCC internally regulated to VDD_ANA (see Table 11)
IOVCC internally regulated to VDD_DIG (see Table 11)
www.national.com
8
Table 11. Power Supply Electrical Specifications (Analog and Digital LDOs)
Symbol
Parameter
Typ1
Min
Max
Unit
VDD_ANA_OUT2
Analog Voltage Output Range
2.8
V
VDD_DIG_OUT3
Digital Voltage Output Range
2.5
V
1.
2.
3.
Typical operating conditions are VCC = 3.3V, IOVCC = 3.3V operating voltage and 25°C ambient temperature. Values
reflect voltages of internally generated, regulated voltages VDD_ANA and VDD_DIG
Output of internally generated regulated voltage VDD_ANA
Output of internally generated regulated voltage VDD_DIG
Note: The voltage regulators are optimized for the internal
operation of the LMX9820A. Because any noise coupled
into these supplies can have influence on the radio perfor-
mance, it is highly recommended to have no additional
load on their outputs.
Symbol
e
Table 12. Power Supply Requirements1
Parameter
Min
Power supply current for continuous transmit
ICC-RX
Power supply current for continuous receive
ICC-Inq
Inquiry
IRXSL
Max
Unit
68
mA
62
mA
31
mA
Receive Data in SPP Link, slave 3,4
23
mA
IRXM
Receive Data in SPP Link, master 3,4
18
mA
IHV3
bs
ol
et
ICC-TX
Typ2
ISnM
ISC-TLDIS
IIdle
22
mA
Sniff Mode, sniff interval 1 second 3
8
mA
Scanning, no active link, TL disabled 3,5
500
µA
Idle, scanning disabled, TL disabled 3,5
150
µA
Power supply requirements based on Class II output power.
VCC = 3.3V, IOVCC = 3.3V, Ambient Temperature = +25°C.
Average values.
Based on UART Baudrate 115.2kbit/s.
TL: Transport Layer
O
1.
2.
3.
4.
5.
Active HV3 SCO Audio Link
9
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LMX9820A
6.0 Electrical Specifications (Continued)
6.2 DC CHARACTERISTICS
Table 13. Digital DC Characteristics
Symbol
Parameter
Condition
Min
Max
Units
Core Logic Supply Voltage
2.85
3.6
V
IOVCC2
IO Supply Voltage
2.85
3.6
V
VIH
Logical 1 Input Voltage
0.7 x
VDD_ANA
VDD_ANA +
0.5
V
VIL
Logical 0 Input Voltage
-0.5
0.2 x
VDD_ANA
V
VHYS
Hysteresis Loop Width3
0.1 x
VDD_ANA
V
IOH
Logical 1 Output Current
VDD_ANA = 2.8V
-1.6
mA
IOL
Logical 0 Output Current
VDD_ANA = 2.8V
1.6
mA
IOHW
Weak Pull-up Current
VDD_ANA = 2.8V
-10
µA
IIH
High-level Input Current
VIH = VDD_ANA = 2.8V
- 10
10
µA
IIL
Low-level Input Current
VIL = 0
- 10
10
µA
IL
High Impedance Input Leakage
Current
0V ≤ VIN ≤ VDD_ANA
-2.0
2.0
µA
IO(Off)
Output Leakage Current (I/O pins in
input mode)
0V ≤ VOUT ≤ VDD_DIG
-2.0
2.0
µA
et
bs
ol
1.
2.
3.
e
VCC1
VCC internally regulated to VDD_ANA (see Table 11)
IOVCC internally regulated to VDD_DIG (see Table 11)
Guaranteed by design.
O
LMX9820A
6.0 Electrical Specifications (Continued)
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10
6.3 RF PERFORMANCE CHARACTERISTICS
• TA = -40°C to +85°C
• VCC = 3.3V, IOVCC = 3.3V unless otherwise specified
RF system performance specifications are guaranteed on
National Semiconductor Austin Board rev1.0b reference
design platform.
In the performance characteristics tables the following
applies:
• All tests performed are based on Bluetooth Test Specification rev 0.92.
• All tests are measured at antenna port unless otherwise
specified
Table 14. Receiver Performance Characteristics
RXsense
2
PinRF
Receive Sensitivity
Typ1
Max
Unit
2.402 GHz
-81
-77
dBm
2.441 GHz
-81
-77
dBm
2.480 GHz
-81
-77
dBm
Condition
BER < 0.001
Maximum Input Level
Carrier to Interferer Ratio in
the Presence of Adjacent
Channel Interferer
Min
-10
0
-1
dB
∆FACI = + 2 MHz.
PinRF = -60 dBm,
BER < 0.001
-37
dB
∆FACI = + 3 MHz,
PinRF = -67 dBm,
BER < 0.001
-47
dB
-32
dB
bs
ol
C/IIMAGE -1MHz Carrier to Interferer Ratio in
the Presence of Image-1MHz
Interferer
∆f = -3 MHz,
PinRF = -67 dBm,
BER < 0.001
IMP3,4
F1= + 3 MHz,
F2= + 6 MHz,
PinRF = -64 dBm
RSSI
ZRFIN
RSSI Dynamic Range at LNA
Input
Input Impedance of RF Port
(RF_inout)
OOB3
1.
2.
3.
4.
-38
Out Of Band Blocking
Performance
-36
-72
Single input impedance
Fin = 2.45 GHz
dBm
-52
dBm
Ω
50
-8
Return Loss
O
Return Loss3
Intermodulation Performance
dBm
∆FACI = + 1 MHz,
PinRF = -60 dBm,
BER < 0.001
et
C/IACI
3
Parameter
e
Symbol
dB
PinRF = -10 dBm,
30 MHz < FCWI < 2 GHz,
BER < 0.001
-10
dBm
PinRF = -27 dBm,
2000 MHz < FCWI < 2399 MHz,
BER < 0.001
-27
dBm
PinRF = -27 dBm,
2498 MHz < FCWI < 3000 MHz,
BER < 0.001
-27
dBm
PinRF = -10 dBm,
3000 MHz < FCWI < 12.75 GHz,
BER < 0.001
-10
dBm
Typical operating conditions are at 2.85V operating voltage and 25°C ambient temperature.
The receiver sensitivity is measured at the device interface.
Not tested in production.
The f0 = -64 dBm Bluetooth modulated signal, f1 = -39 dbm sine wave, f2 = -39 dBm Bluetooth modulated signal,
f0 = 2f1 - f2, and |f2 - f1| = n x 1 MHz, in which n is 3, 4, or 5. For the typical case, n = 3.
11
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LMX9820A
6.0 Electrical Specifications (Continued)
Table 15. Transmitter Performance Characteristics
Symbol
Parameter
Transmit Output Power
POUTRF 2
Min Typ1
Condition
Max
Unit
2.402 GHz
-3
+1
+4
dBm
2.441 GHz
-3
+1
+4
dBm
2.480 GHz
-3
+1
+4
dBm
-4
1
2
dBm
175
kHz
Power Density 5
Power Density
MOD ∆F1AVG
Modulation Characteristics
Data = 00001111
140
165
MOD ∆F2MAX 3
Modulation Characteristics
Data = 10101010
115
125
∆F2AVG/∆F1AVG 4
Modulation Characteristics
kHz
0.8
20 dB Bandwidth
1000
kHz
|M-N|=2
-48
-20
dBm
|M-N|>3
-51
-40
dBm
POUT2*fo 6
PA 2nd Harmonic
Suppression
Maximum gain setting:
f0 = 2402 MHz,
Pout = 4804 MHz
-30
dBm
POUT3*fo 5
PA 3rd Harmonic
Suppression
Maximum gain setting:
f0 = 2402 MHz,
Pout = 7206 MHz
-32
dBm
Return Loss 5
1.
2.
3.
4.
5.
6.
et
bs
ol
ZRFOUT
e
Adjacent Channel Power
(In-band Spurious)
ACP 5
RF Output Impedance/Input
Impedance of RF Port
(RF_inout)
Pout @ 2.5 GHz
Ω
50
Return Loss
-14
dB
Typical operating conditions are at VCC = 3.3V, IOVCC = 3.3V operating voltage and 25°C ambient temperature.
The output power is measure at the device interface.
∆F2max > 115 kHz for at least 99.9% of all ∆f2max.
Modulation index set between 0.28 and 0.35.
Not tested in production.
Out-of-Band spurs only exist at 2nd and 3rd harmonics of the CW frequency for each channel.
O
LMX9820A
6.0 Electrical Specifications (Continued)
Table 16. Synthesizer Performance Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
fVCO
VCO Frequency Range
tLOCK
Lock Time
f0 + 20 kHz
∆f0offset 1,2
Initial Carrier Frequency Tolerance
During preamble
-75
0
75
kHz
∆f0drift 2,3
Initial Carrier Frequency Drift
DH1 data packet
-25
0
25
kHz
DH3 data packet
-40
0
40
kHz
DH5 data packet
-40
0
40
kHz
Drift Rate
-20
0
20
kHz/50µs
tD-Tx
1.
2.
3.
Transmitter Delay Time
From Tx data to antenna
5000
MHz
120
µs
4
µs
Frequency accuracy is dependent on crystal oscillator chosen. The crystal must have a cumulative accuracy of 15 ppm @ -40 to +85°C
CL Load Capacitance
16 pF
ESR
80Ω max.
C0 Shunt Capacitance
5 pF
Drive Level
50 ±10uV
Pullability
2 ppm/pF min
Storage Temperature
-40 to +85°C
e
3. Frequency Tuning
Frequency tuning is achieved by adjusting the crystal load
capacitance with external capacitors. It is a Bluetooth
requirement that the frequency is always within 20 ppm.
The crystal network or oscillator must have cumulative
accuracy specifications of 15 ppm to provide margin for
frequency drift with aging and temperature.
Value
L1
C0
Figure 10. Crystal Equivalent Circuit
et
Table 22. TEW on Arizona Board
Reference
LMX9820A
Ct1
10 pF
Ct2
10 pF
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ol
TEW Crystal
The LMX9820A has been tested with the TEW TAS-4025A
crystal, see Table 21 on page 19 for specification. Because
the internal capacitance of the crystal circuit is 8 pF and the
load capacitance is 16 pF, 12 pF is a good starting point for
both Ct1 and Ct2. The 2480 MHz RF frequency offset is
then tested. Figure 11 on page 20 shows the RF frequency
offset test results.
O
Figure 11 on page 20 shows the results are -20 kHz off the
center frequency, which is -1 ppm. The pullability of the
crystal is 2 ppm/pF, so the load capacitance must be
decreased by about 1.0 pF. By changing Ct1 or Ct2 to
10 pF, the total load capacitance is decreased by 1.0 pF.
Figure 12 on page 20 shows the frequency offset test
results. The frequency offset is now zero with Ct1 = 10 pF,
Ct2 = 10 pF.
Reference Table 22 on page 19 for crystal tuning values
used on Austin Development Board with TEW crystal.
19
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e
et
bs
ol
Figure 11. Frequency Offset with 12 pF/12 pF Capacitors
O
LMX9820A
8.0 Digital Smart Radio (Continued)
Figure 12. Frequency Offset with 10 pF/10 pF Capacitors
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20
8.7.2 TCXO (Temperature Compensated Crystal
Oscillator)
8.7.3 Optional 32 kHz Oscillator
A second oscillator is provided (see Figure 13) that is tuned
to provide optimum performance and low-power consumption while operating with a 32.768 kHz crystal. An external
crystal clock network is required between the 32kHz_CLKI
clock input (pad B13) and the 32kHz_CLKO clock output
(pad C13) signals.The oscillator is built in a Pierce configuration and uses two external capacitors. Table 23 provides
the oscillator’s specifications.
The LMX9820A also can operate with an external TCXO
(Temperature Compensated Crystal Oscillator). The TCXO
signal is directly connected to the CLK+.
1. Input Impedance
The LMX9820A CLK+ pin has in input impedance of 2 pF
capacitance in parallel with >400kΩ resistance.
In case the 32Khz is placed optionally, it is recommended
to remove C2 and replace C1 with a zero ohm resistor.
32kHz_CLKI
C1
32.768 kHz
e
32kHz_CLKO
C2
et
GND
Figure 13. 32.768 kHz Oscillator
Symbol
bs
ol
Table 23. 32.768 kHz Oscillator Specifications
Parameter
VDD
Supply Voltage
IDDACT
Supply Current (Active)
f
Nominal Output Frequency
VPPOSC
Oscillating Amplitude
Condition
Typ
Max
Unit
1.62
1.8
1.98
V
40
2
µA
32.768
kHz
1.8
V
60
%
O
Duty Cycle
Min
21
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LMX9820A
8.0 Digital Smart Radio (Continued)
8.7.4 ESR (Equivalent Series Resistance)
LMX9820A can operate with a wide range of crystals with
different ESR ratings. Reference Table 24 on page 22 and
Figure 14 on page 22 for more details.
Table 24. System Clock Requirements
Parameter
Min
External Reference Clock Frequency
Typ
Max
Unit
12 MHz
Frequency Tolerance (over full operating temperature and aging)
15
Crystal Serial Resistance
External Reference Clock Power Swing, pk to pk
100
200
20
ppm
230
Ω
400
mV
1
ppm per year
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et
e
Aging
MHz
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LMX9820A
8.0 Digital Smart Radio (Continued)
Figure 14. ESR vs. Load Capacitance for the Crystal
8.8 ANTENNA MATCHING AND FRONT-END FILTERING
LC filter
Figure 15 shows the recommended component layout to
be used between RF output and antenna input. Allows for
versatility in the design such that the match to the antenna
maybe improved and/or the blocking margin increased by
addition of a LC filter. Refer to antenna design application
note rev1.1 for further details
To Antenna
PI Match
Figure 15. Front End Layout
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22
2. Reset_b# and Reset_5100# of the LMX9820A are driven
high a minimum of 2 ms after the LMX9820A voltage
rails are high. The LMX9820A is the properly reset.
See Table 25 on page 23.
The following sequence must be performed to correctly
power-up the LMX9820A:
1. Apply IOVCC and VCC to the LMX9820A.
VCC
tPTOR
IOVCC
BBP_CLOCK
Low
TX_RX_DATA
High
e
Low
Low
TX_RX_SYNC
Low
CCB_DATA
et
Reset_b#
Reset_5100
Low
CCB_CLOCK
High
bs
ol
CCB_LATCH
LMX9820A
LMX9820A
Oscillator
Initialization
Start-Up
Standby
Active
LMX9820A
Initialization
LMX9820A in Normal Mode
LMX9820A in
Power-Up Mode
O
Figure 16. LMX9820A System Power-Up Sequence Timing
Table 25. LMX9820A System Power-up Sequence Timing
Symbol
tPTOR
Parameter
Power to Reset
Condition
VCC and IOVCC at operating
voltage level to valid reset
23
Min
2
Typ
Max
Unit
ms
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LMX9820A
9.0 System Power-Up Sequence
Transparent Mode
The LMX9820A supports transparent data communication
from the UART interface to a Bluetooth link.
The LMX9820A includes the full Bluetooth protocol stack
up to RFComm to support the following profiles:
If activated, the module does not interpret the commands
on the UART which normally are used to configure and
control the module. In this case, the packets do not need to
be formatted as described in Table 27 on page 27. Instead,
all data are directly passed through the firmware to the
active Bluetooth link and the remote device.
— GAP (Generic Access Profile)
— SDAP (Service Discovery Application Profile)
— SPP (Serial Port Profile)
Figure 17 shows the Bluetooth protocol stack with command interpreter interface. The command interpreter offers
a number of different commands to support the functionality given by the different profiles. Execution and interface
timing is handled by the control application.
Transparent mode can only be supported on a point-topoint connection. To leave Transparent mode, the host
must send a UART_BREAK signal to the module
Force Master Mode
The chip has an internal data area in Flash and the NVS
parameters can be found in the Software Users Guide.
In Force Master mode, the LMX9820A tries to act like an
Access point for multiple connections. In this mode, it will
only accept a link if a master/slave role switch is accepted
by the connecting device. After successful link establishment, the LMX9820A will be master and available for additional incoming links. On the first incoming link the
LMX9820A may switch to transparent mode, depending on
the setting for automatic or command mode. Additional
links will only be possible if the device is not in transparent
mode.
e
Command Interpreter
Control Application
SPP
SDAP
RFComm
The LMX9820A supports the storage of up to 3 default connections within its NVS. Those connections can either be
connected after reset or on demand using a specific command.
bs
ol
L2CAP
SDP
et
10.1.2 Default Connections
GAP
10.1.3 Event Filter
Link Manager
The LMX9820A uses events or indicators to notify the host
about successful commands or changes on the Bluetooth
interface. Depending on the application, the LMX9820A
can be configured. The following levels are defined:
Baseband
Figure 17. LMX9820A Software Implementation
• No Events—the LMX9820A is not reporting any events.
Optimized for passive cable replacement solutions.
10.1 FEATURES
• Standard LMX9820A Events—only necessary events
will be reported.
10.1.1 Operation Modes
On boot-up, the application configures the module following the parameters in the data area.
• All Events—additional to the standard all changes at the
physical layer will be reported.
Automatic Mode
O
LMX9820A
10.0 Integrated Firmware
No Default Connections Stored
10.1.4 Default Link Policy
In Automatic mode the module is connectable and discoverable and automatically answers to service requests. The
command interpreter listens to commands and links can be
set up. The full command list is supported.
Each Bluetooth link can be configured to support master/slave role switch, Hold mode, Sniff mode, and Park
mode. The default link policy defines the standard setting
for incoming and outgoing connections.
If connected by another device, the module sends an event
back to the host, where the RFComm port has been connected, and switches to transparent mode.
10.1.5 Audio Support
The LMX9820A offers commands to establish and release
synchronous connections (SCO) to support Headset or
Handsfree applications. The firmware supports one active
link with all available package types (HV1, HV2, HV3), for
routing audio data between the Bluetooth link and the
advanced audio interface. To provide the analog data interface, an external audio codec is required. The LMX9820A
includes a list of codecs which can be used
Default Connections Stored
If default connections were stored on a previous session,
after the LMX9820A is reset, it will attempt to reconnect to
each device stored within the data Flash three times. The
host will be notified about the success of the link setup via
a link status event.
Command Mode
10.1.6 Default Sniff operation
In Command mode, the LMX9820A does not check the
default connections section within the Data Flash. If connected by another device, it will not switch to transparent
mode and continue to interpret data sent on the UART.
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To support optimized power consumption, the LMX9820A
offers the ability to enable Sniff mode during link establishment on incoming links or on default connection setup. The
default parameters for the Sniff mode are stored in NVS.
24
to disable the transport layer. Therefore, only the host-side
command interface can disable the transport layer.
Enabling the transport layer is controlled by the hardware
wake-up signalling. This can be initiated from either the
host or an LMX9820A input. See also “LMX9820A Software Users Guide” for detailed information on timing and
implementation requirements.
The LMX9820A supports several low-power modes to
reduce power in different operating situations. The modular
structure of the LMX9820A allows the firmware to power
down unused modules.
The low-power modes have influence on:
• UART transport layer—enables or disables the interface.
Table 26. Power Mode Activity
Power
Mode
UART
Bluetooth
Radio
Reference
Clock
PM0
Off
Off
None
11.1 LOW POWER MODES
PM1
On
Off
12 MHz
The following LMX9820A power modes, which depend on
the activity level of the UART transport layer and the radio
activity, are defined:
PM2
Off
Scanning
12 MHz /
32kHz1
PM3
On
Scanning
12 MHz
The activity of the Bluetooth radio mainly depends on application requirements and is controlled by standard Bluetooth operations such as inquiry/page scanning or an
active link. A remote device establishing or disconnecting a
link may also indirectly change the activity level of the
radio.
PM4
Off
SPP Link
12 MHz
PM5
On
SPP Link
12 MHz
1.
12MHz used if 32khz not present
et
The UART transport layer by default is enabled on device
power up. The “Disable Transport Layer” command is used
e
• Bluetooth Baseband activity—firmware disables LLC
and radio, if possible.
Bluetooth Radio Activity
Page / Inquiry Scanning
bs
ol
No radio activity
Active Link(s)
All Links Released
UART Disabled
Wake-up Enabled
PM2
PM0
Disable TL
O
TL Enabled
UART Enabled
Wake-up Disabled
PM1
Incoming Link
All Links released
PM4
Disable TL
TL Enabled
TL Enabled
Link Established
Scanning Enabled
Scanning Disabled
Disable TL
PM3
All Links released
PM5
Link Established
All Links released
Figure 18. Transition between different Hardware Power Modes
25
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LMX9820A
11.0 Power Reduction
11.2 UART TRANSPORT LAYER CONTROL
11.2.3 LMX9820A Enabling the UART Interface
Because the transport layer can be disabled in any situation, the LMX9820A must verify that the transport layer is
enabled before sending data to the host. Possible situations in which the LMX9820A will need to re-enable the
interface include incoming data or incoming link indicators.
If the UART is not enabled, the LMX9820A must assume
that the host is in a low-power mode and initiate a wake-up
event by asserting RTS and setting HOST_WU to 1. To be
able to respond to the wake-up event, the host must monitor its CTS input (i.e. the LMX9820A RTS output).
11.2.1 Hardware Wake-Up Functionality
In some circumstances, the host may switch off the transport layer of the LMX9820A to reduce power consumption.
The host and LMX9820A then may shut down their UART
interfaces.
To simplify the system design, the UART interface is configured for hardware wake-up functionality. For a detailed
timing and command functionality, see the “LMX9820A
Software Users Guide”.
As soon as the host activates its RTS output (i.e. the
LMX9820A CTS input), the LMX9820A will first send a confirmation event and then start to transmit the events.
The interface between the host and LMX9820A is shown in
Figure 19.
11.2.4 Enabling the UART Transport Layer from Host
Host
GPIO
Host_WU
(optional)
e
RTS#
CTS#
TX
RX
RTS#
CTS#
TX
RX
If the host needs to send data or commands to the
LMX9820A while the UART transport layer is disabled, it
must first assume that the LMX9820A is sleeping and wake
it up by asserting the host RTS output (i.e. the LMX9820A
CTS input).
When the LMX9820A detects the wake-up signal, it
enables the UART and acknowledges the wake-up signal
by asserting its RTS output and HOST_WU signal. Additionally, the wake-up event will be acknowledged by sending a confirmation event. When the host has received this
“Transport Layer Enabled” event, it knows the LMX9820A
is ready to receive commands.
et
LMX9820A
bs
ol
Figure 19. UART Null Modem Connections
11.2.2 Disabling the UART Transport Layer
The host can disable the UART transport layer by sending
the “Disable Transport Layer” Command. The LMX9820A
will empty its buffers, send the confirmation event, and disable its UART interface. The UART interface will then be
reconfigured to wake up the LMX9820A on a falling edge of
the CTS pin.
O
LMX9820A
11.0 Power Reduction (Continued)
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26
12.1.2 Packet Type ID
This byte identifies the type of packet. See Table 28 for
details.
The LMX9820A offers Bluetooth functionality through
either a self-contained slave functionality or a simple command interface. The interface is carried over the UART
interface.
12.1.3 Opcode
The opcode identifies the command to execute. The
opcode values can be found within the “LMX9820A Software User’s Guide” included with the LMX9820A Evaluation Board.
The following sections describe the protocol on the UART
interface between the LMX9820A and the host in command mode (see Figure 20). In Transparent mode, no data
framing is necessary and the device does not interpret data
carried over the interface as commands.
12.1.4 Data Length
Number of bytes in the Packet Data field. The maximum
size is 333 data bytes per packet.
12.1 FRAMING
The connection is considered “Error free”. But for packet
recognition and synchronization, some framing is used.
12.1.5 Checksum
All packets sent in both directions are constructed following
the model shown in Table 27.
This is a simple Block Check Character (BCC) checksum
of the bytes “Packet type”, “Opcode”, and “Data Length”.
The BCC checksum is calculated as low byte of the sum of
all bytes (e.g., if the sum of all bytes is 0x3724, the checksum is 0x24).
12.1.1 Start and End Delimiters
et
LMX9820A
e
The “STX” character is used as the start delimiter: STX =
0x02. ETX = 0x03 is used as the end delimiter.
Existing device
without Bluetooth™
capabilities
UART
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ol
UART
Figure 20. Bluetooth Functionality
.
Table 27. Packet Framing
Start
Delimiter
1 Byte
Packet
Type ID
Opcode
Data Length
Checksum
Packet Data
End
Delimiter
1 Byte
1 Byte
2 Bytes
1 Byte
Bytes
1 Byte
O
- - - - - - - - - - - - - Checksum - - - - - - - - - - - - -
ID
Table 28. Packet Type Identification
Direction
Description
0x52
REQUEST
A request sent to the Bluetooth module.
‘R’
(REQ)
All requests are answered by exactly one confirm.
0x43
Confirm
The Bluetooth modules confirm to a request.
‘C’
(CFM)
All requests are answered by exactly one confirm.
0x69
Indication
Information sent from the Bluetooth module that is not a direct confirm to a request.
‘i’
(IND)
Indicating status changes, incoming links, or unrequested events.
0x72
Response
An optional response to an indication.
‘r’
(RES)
This is used to respond to some type of indication message.
27
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LMX9820A
12.0 Command Interface
12.2 COMMAND SET OVERVIEW
• Set up and handle links
Tables 29 through 39 show the actual command set and
the events coming back from the device. A fully documented description of the commands can be found in the
“LMX9820A Software Users Guide”.
The LMX9820A has a well-defined command set to:
• Configure the device:
– Hardware settings
– Local Bluetooth parameters
– Service database
Note: Additional command details are contained in the
Software Users Guide.
Table 29. Device Discovery Commands
Command
Remote Device Name
Description
Inquiry Complete
Search for devices
Device Found
Lists BDADDR and class of device
Remote Device Name Confirm
Get name of remote device
e
Inquiry
Event
Table 30. SDAP Client Commands
Command
Event
Description
SDAP Connect Confirm
Create an SDP connection to remote device
SDAP Disconnect
SDAP Disconnect Confirm
Disconnect an active SDAP link
Connection Lost
Notification for lost SDAP link
SDAP Service Browse
Service Browse Confirm
Get the services of the remote device
SDAP Service Search
SDAP Service Search Confirm
Search a specific service on a remote device
bs
ol
et
SDAP Connect
SDAP Attribute Request
SDAP Attribute Request Confirm
Searches for services with specific attributes
Table 31. SPP Link Commands
Command
Establish SPP Link
Set Link Timeout
Event
Description
Establishing SPP Link Confirm
Initiates link establishment to a remote device
Link Established
Link successfully established
Incoming Link
A remote device established a link to the local
device
Set Link Timeout Confirm
Confirms the supervision timeout for the existing
link
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LMX9820A
12.0 Command Interface (Continued)
Get Link Timeout
Get Link Timeout Confirm
Get the supervision timeout for the existing link
Release SPP Link
Release SPP Link Confirm
Initiate release of SPP link
SPP Send Data
SPP Send Data Confirm
Send data to specific SPP port
Incoming Data
Incoming data from remote device
Transparent Mode Confirm
Switch to transparent mode on the UART
Transparent Mode
Table 32. Default Connection Commands
Command
Event
Description
Connect Default Connection
Connect Default Connection Confirm
Connects to either one or all stored default
connections
Store Default Connection
Store Default Connection Confirm
Store device as default connection
Get List of Default Connections
List of Default Devices
Delete Default Connections
Delete Default Connections Confirm
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28
LMX9820A
12.0 Command Interface (Continued)
Table 33. Power Mode Commands
Command
Event
Description
Set Default Link Policy
Set Default Link Policy Confirm
Defines the link policy used for any incoming
or outgoing link.
Get Default Link Policy
Get Default Link Policy Confirm
Returns the stored default link policy
Set Link Policy
Set Link Policy Confirm
Defines the modes allowed for a specific link
Get Link Policy
Get Link Policy Confirm
Returns the actual link policy for the link
Enter Sniff Mode
Enter Sniff Mode Confirm
Exit Sniff Mode
Exit Sniff Mode Confirm
Enter Park Mode
Enter Park Mode Confirm
Enter Hold Mode
Enter Hold Mode Confirm
Remote device changed the power save
mode on the link
e
Power Save Mode Changed
Table 34. Audio Control Commands
Event
Description
et
Command
Establish SCO Link Confirm
Establish SCO link on existing RFComm
link
Release SCO Link
Release SCO Link Confirm
Release SCO link
SCO Link Established Indicator
A remote device has established a SCO
link to the local device
bs
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Establish SCO Link
SCO Link Released Indicator
SCO link has been released
Change SCO Packet Type Confirm
Changes packet type for existing SCO link
SCO Packet Type changed indicator
SCO packet type has been changed
Set Audio Settings
Set Audio Settings Confirm
Set audio settings for existing link
Get Audio Settings
Get Audio Settings Confirm
Get audio settings for existing link
Set Volume
Set Volume Confirm
Configure the volume
Get Volume Confirm
Get current volume setting
Mute Confirm
Mutes the microphone input
Change SCO Packet Type
Get Volume
O
Mute
Command
Disable Transport Layer
Table 35. Wake Up Function Commands
Event
Description
Transport Layer Enabled
Disabling the UART transport layer and
activates the hardware wake-up function
29
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Table 36. SPP Port Configuration and Status Commands
Command
Event
Description
Set Port Config Confirm
Set port setting for the “virtual” serial port link
over the air
Get Port Config
Get Port Config Confirm
Read the actual port settings for a “virtual”
serial port
Port Config Changed
Notification if port settings were changed
from remote device
SPP Get Port Status
SPP Get Port Status Confirm
Returns status of DTR and RTS (for the active RFComm link)
SPP Port Set DTR
SPP Port Set DTR Confirm
Sets the DTR bit on the specified link
SPP Port Set RTS
SPP Port Set RTS Confirm
Sets the RTS bit on the specified link
SPP Port BREAK
SPP Port BREAK
SPP Port Overrun Error
SPP Port Overrun Error Confirm
e
Set Port Config
Indicates that the host has detected a break
Used to indicate that the host has detected an
overrun error
SPP Port Parity Error Confirm
SPP Port Framing Error
SPP Port Framing Error Confirm
Host has detected a framing error
Host has detected a parity error
SPP Port Status Changed
Indicates that remote device has changed
one of the port status bits
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SPP Port Parity Error
Table 37. Local Settings Commands
Command
Event
Description
Read Local Name
Read Local Name Confirm
Read user-friendly name of the device
Write Local Name
Write Local Name Confirm
Set the user-friendly name of the device
Read Local BDADDR
Read Local BDADDR Confirm
Change Local BDADDR
Change Local BDADDR Confirm
Store Class of Device
Store Class of Device Confirm
Set Scan Mode
Set Scan Mode Confirm
Note:
Only use if you have your own
BDADDR pool
Change mode for discoverability and
connectability
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LMX9820A
12.0 Command Interface (Continued)
Set Scan Mode Indication
Reports end of automatic limited
discoverable mode
Get Fixed Pin
Get Fixed Pin Confirm
Reads current PinCode stored within the
device
Set Fixed Pin
Set Fixed Pin Confirm
Set the local PinCode
Get Security Mode
Get Security Mode Confirm
Get actual Security mode
Set Security Mode
Set Security Mode Confirm
Configure Security mode for local device
(default 2)
Remove Pairing
Remove Pairing Confirm
Remove pairing with a remote device
List Paired Devices
List of Paired Devices
Get list of paired devices stored in the
LMX9820A data memory
Set Default Link Timeout
Set Default Link Timeout Confirm
Store default link supervision timeout
Get Default Link Timeout
Get Default Link Timeout Confirm
Get stored default link supervision timeout
Force Master Role
Force Master Role Confirm
Enables/Disables the request for master role
at incoming connections
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30
LMX9820A
12.0 Command Interface (Continued)
Table 38. Local Service Database Configuration Commands
Command
Event
Description
Store SPP Record Confirm
Create a new SPP record within the service database
Store DUN Record
Store DUN Record Confirm
Create a new DUN record within the service database
Store FAX Record
Store FAX Record Confirm
Create a new FAX record within the service database
Store OPP Record
Store OPP Record Confirm
Create a new OPP record within the service database
Store FTP Record
Store FTP Record Confirm
Create a new FTP record within the service database
Store IrMCSync Record
Store IrMCSync Record Confirm
Create a new IrMCSync record within the service
database
Enable SDP Record
Enable SDP Record Confirm
Delete All SDP Records
Delete All SDP Records Confirm
Ports to Open
Ports to Open Confirmed
e
Store SPP Record
et
Enable or disable SDP records
Specify the RFComm Ports to open on
startup
Table 39. Local Hardware Commands
Event
bs
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Command
Description
Set Default Audio Settings
Set Default Audio Settings Confirm
Configure default settings for audio codec
and air format, stored in NVS
Get Default Audio Settings
Get Default Audio Settings Confirm
Get stored default audio settings
Set Event Filter
Set Event Filter Confirm
Configures the reporting level of the
command interface
Get Event Filter
Get Event Filter Confirm
Get the status of the reporting level
Read RSSI
Read RSSI Confirm
Returns an indicator for the incoming signal
strength
Change UART Speed Confirm
Set specific UART speed; needs proper ISEL
pin setting
O
Change UART Speed
Change UART Settings
Change UART Settings Confirm
Change configuration for parity and stop bits
Test Mode
Test Mode Confirm
Enable Bluetooth, EMI test, or local loopback
Restore Factory Settings
Restore Factory Settings Confirm
Reset
Dongle Ready
Soft reset
Firmware Upgrade
Stops the Bluetooth firmware and executes
the in-system programming code
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The SPP conformance of the LMX9820A allows any device
using the SPP to connect to the LMX9820A.
13.1 SCENARIO 1: POINT-TO-POINT
CONNECTION
By switching to transparent mode automatically, the controller has no need for an additional protocol layer; data is
sent raw to the other Bluetooth device.
LMX9820A acts only as slave, no further configuration is
required.
On default, a PinCode is requested to block unallowed targeting.
Example: Sensor with LMX9820A; hand-held device with
standard Bluetooth option.
Air Interface
Standard Device
with Bluetooth
Sensor Device
UART
Inquiry Request
Search for Devices
Inquiry Response
SDP Link Accept
et
Service Browse
Get Remote Services
e
SDP Link Request
Service Response
Release SDP Link
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Release Confirm
Connected
on Port L
SPP Link Request
Establish SPP Link
SPP Link Accept
Link Established
Transparent Mode
Raw Data
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LMX9820A
13.0 Usage Scenarios
Microcontroller
LMX9820A
No Bluetooth™ commands necessary
only “connected” event indicated to controller
The client software only
shows high level functions
Figure 21. Point-to-Point Connection
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32
13.2 SCENARIO 2: AUTOMATIC POINT-TO-POINT
CONNECTION
If step 5 is executed, the stored default device is connected
(step 4) after reset (in automatic mode only) or by sending
the “Connect to Default Device” command. The command
can be sent to the device at any time.
LMX9820A at both sides.
Example: Serial Cable Replacement.
If step 6 is left out, the microcontroller has to use the “Send
Data” command, instead of sending data directly to the
module.
Device #1 controls the link setup with a few commands as
described.
Serial Device #1
Serial Device #2
Air
Interface
1. Devices in Range?
Inquiry
Inquiry
Inquiry Result
Inquiry Result
Inquiry Request
Inquiry Response
2. Choose the Device
e
3. Which COM Port is
available?
Establish SDP Link
Establish SDP Link
SDP Link Established
SDP Link Established
Service Browse
Service Browse
Service Browse
RFComm Port = R
Browse Result
Service Response
SDP Link Request
bs
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SDP Link Accept
Release SDP Link
Release SDP Link
Release SDP Link
SDP Link Released
SDP Link Released
Release Confirm
Establish SPP Link
to Port R1 on Port L2
Establish SPP Link
to Port R on Port L
SPP Link Request
Connected on Port L
Link Established
SPP Link Accept
4. Create SPP Link
5. Connect on Default
(Optional)
Connected
on Port R
Transparent Mode
Storing Default Device
Device Stored
Device Stored
O
Store Default Device
6. Switch to
Transparent
Transparent Mode
Transparent Mode
Raw Data
Microcontroller
LMX9820A
LMX9820A
Bluetooth™ device controls link with
a few commands
Microcontroller
No Bluetooth™ commands necessary;
only “connected” event indicated to controller
1. Port R indicates the remote RFComm channel to connect to. Usually the result of the SDP request.
2. Port L indicates the Local RFComm channel used for that connection.
Figure 22. Automatic Point-to-Point Connection
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LMX9820A
13.0 Usage Scenarios (Continued)
13.3 SCENARIO 3: POINT-TO-MULTIPOINT
CONNECTION
Serial Device #1 is acting as master for both devices. The
host controls which device is sending data, using the “Send
data” command. If the device receives data from the other
devices, it is packaged into an “Incoming data” event. The
event includes the device related port number.
LMX9820A acts as master for several slaves.
Example: Two sensors with LMX9820A; one hand-held
master device with LMX9820A.
If necessary, a link configuration can be stored as default in
the master Serial Device #1 to enable the automatic reconnect after reset, power-up, or by sending the “connect
default connection” command.
Serial Devices #2 and #3 establish the link automatically as
soon as they are contacted by another device. No controller interaction is necessary for setting up the Bluetooth link.
Both switch automatically into transparent mode. The host
sends raw data over the UART.
Serial Device #1
Air
Interface
Connect to Device #2
see Scenario 2
Link Established
on Port L1
Link Established
Serial Device #2
Connection Request
e
Connect to Device #2
see Scenario 2
Automatic Link Setup
Connected
on Port L
et
Transparent Mode
Send Data Command
Data Received
from Port L1
Receive Data Event
Raw Data
bs
ol
Send Data to Port L1
LMX9820A
Microcontroller
Serial Device #3
Connect to Device #3
see Scenario 2
Connect to Device #3
see Scenario 2
Connection Request
Link Established
on Port L2
Link Established
Automatic Link Setup
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LMX9820A
13.0 Usage Scenarios (Continued)
Transparent Mode
Send Data to Port L2
Send Data Command
Data Received
from Port L2
Receive Data Event
Microcontroller
Raw Data
LMX9820A
LMX9820A
Figure 23. Point-to-Multipoint Connection
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Connected
on Port L
34
Microcontroller
ISEL2 (pad H13) and ISEL1 (pad J13) can be strapped to
the host logic 0 and 1 levels to set the host interface bootup configuration. Alternatively both ISEL2 and ISEL1 can
be hardwired over 10kΩ pullup/pulldown resistors.
Env0 (pad E9) and Env1 (pad B11) can be left unconnected (both are pulled high), if no ISP capability is
required. If the ISP environment mode is needed, then
Env0 must be driven to logic low and Reset needs to be
asserted. After de-assertion of Reset, the LMX9820A boots
into the mode corresponding to the values present on Env0
and Env1. Alternatively, a firmware upgrade command can
be used.
Figure 24 on page 35 represents a typical system schematic with optional 32KHz mounted for the LMX9820A.
14.1 MATCHING NETWORK
The antenna matching network may or may not be
required, depending upon the impedance of the antenna
chosen. A 6.8 pF blocking capacitor is recommended.
14.2 FILTERED POWER SUPPLY
It is important to provide the LMX9820A with adequate
ground planes and a filtered power supply. It is highly recommended that a 0.1 µF and a 10 pF bypass capacitor be
placed as close as possible to VCC (pad H2) on the
LMX9820A.
14.4 CLOCK INPUT
The clock source must be placed as close as possible to
the LMX9820A. The quality of the radio performance is
directly related to the quality of the clock source connected
to the oscillator port on the LMX9820A. Careful attention
must be paid to the crystal/oscillator parameters or radio
performance could be drastically reduced.
14.3 HOST INTERFACE
To set the logic thresholds of the LMX9820A to match the
host system, IOVCC (pad H12) must be connected to the
logic power supply of the host system. It is highly recommended that a 10 pF bypass capacitor be placed as close
as possible to the IOVCC pad on the LMX9820A.
e
et
VCC
B1 Antenna
10 pF
6.8 pF
H8
IOVCC
0.01 µF
10 pF
H2
RF_inout
C13
C1
B13
C9
Connect to system
UART bus.
Uart_rx
32kHz_CLKO
32 KHz
Y2
0.01 µF
H12
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Optional 32KHz
Circuitry
14.5 SCHEMATIC AND LAYOUT EXAMPLES
D9
Uart_tx
32kHz_CLKI
No HW Flowcontrol:
- CTS GND
- RTS NC
D10
Uart_cts
C2
C10
Uart_rts
VCC
D11
B9
Reset_5100
Clk+
12 MHz
LMX9820A
Y1
max
1KΩ
Reference Table
25 on page 23
for correct POR
timing.
G8
Reset_b
B8
Clk-
Ct2
O
Ct1
Connect to
PCM codec
or leave open
E9
Env0
B11
Reference
Table 17 on
page 15.
Env1
B10
AAI_srd
B12
AAI_std
J13
C11
ISEL1
AAI_sfs
Dig_gnd[1:2]
C12
AAI_sclk
RF GND
D12, G11
H13
Reference
Table 18 on
page 16.
ISEL2
Notes:
Capacitor values, Ct1, Ct2, C1 and C2 may vary depending on board design crystal manufacturer specification.
Single ground plane is used for both RF and digital grounds.
Recommend that a 4 component T-PI pad be used between RF output and antenna. This allows for versatility in the design such that the
match to the antenna maybe improved and/or the blocking margin increased by use a LC filter.
Figure 24. Example System Schematic
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LMX9820A
14.0 Application Information
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LMX9820A
14.0 Application Information (Continued)
Figure 25. Component Placement (Layer 1)
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36
LMX9820A
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14.0 Application Information (Continued)
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Figure 26. Solid Ground Plane (Layer 2)
Figure 27. Signal Plane (Layer 3)
37
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Figure 28. Component Layout Bottom (Layer 4)
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LMX9820A
14.0 Application Information (Continued)
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38
LMX9820A
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15.0 Reference Design
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Table 40, Table 41 and Figure 29 on page 41 provide the
soldering details required to properly solder the LMX9820A
to standard PCBs. The illustration serves only as a guide
and National is not liable if a selected profile does not work.
The LMX9820A bumps are designed to melt as part of the
Surface Mount Assembly (SMA) process. In order to
ensure reflow of all solder bumps and maximum solder
joint reliability while minimizing damage to the package,
recommended reflow profiles should be used.
See IPC/JEDEC J-STD-020C, July 2004 for more information
Table 40. Soldering Details
Parameter
Value
PCB Land Pad Diameter
24 mil
PCB Solder Mask Opening
30 mil
PCB Finish (HASL details)
Defined by customer or manufacturing facility
28 mil
Stencil Thickness
5 mil
Solder Paste Used
Defined by customer or manufacturing facility
Flux Cleaning Process
Defined by customer or manufacturing facility
e
Stencil Aperture
See Figure 29 on page 41
et
Reflow Profiles
Table 41. Classification Reflow Profiles1, 2
Profile Feature
Sn-Pb Eutectic Assembly
NOPB Assembly
3°C/second maximum
3°C/second maximum
Preheat:
Temperature Min (TsMIN)
Temperature Max (TsMAX)
Time (tsMIN to tsMAX)
100°C
150°C
60–120 seconds
150°C
200°C
60–180 seconds
Time maintained above:
Temperature (TL)
Time (tL)
183°C
60–150 seconds
217°C
60–150 seconds
225 +0/-5°C
260 + 0°C
10–30 seconds
20–40 seconds
6°C/second maximum
6°C/second maximum
6 minutes maximum
8 minutes maximum
See Figure 29
See Figure 29
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ol
Average Ramp-Up Rate (TsMAX to
Tp)
Peak/Classification Temperature (Tp)
Time within 5°C of actual Peak
Temperature (tp)
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LMX9820A
16.0 Soldering
Ramp-Down Rate
Time 25 °C to Peak Temperature
Reflow Profiles
1.
2.
See IPC/JEDEC J-STD-020C, July 2004.
All temperatures refer to the top side of the package, measured on the package body surface.
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40
LMX9820A
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16.0 Soldering (Continued)
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Figure 29. Typical Reflow Profiles
41
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stages/definitions of the datasheet. Table 43 lists the revision history.
This section is a report of the revision/creation process of
the datasheet for the LMX9820A. Table 42 provides the
Table 42. Documentation Status Definitions
Definition
Advance Information
Formative or in Design
This datasheet contains the design specifications for product development. Specifications may change in any manner without notice.
Preliminary
First Production
This datasheet contains preliminary data. Supplementary data will
be published at a later date. National Semiconductor Corporation
reserves the right to make changes at any time without notice in order to improve design and supply the best possible product.S
No Identification Noted
Full production
This datasheet contains final specifications. National Semiconductor Corporation reserves the right to make changes at any time
without notice in order to improve design and supply the best possible product.
Obsolete
Not in Production
This datasheet contains specifications on a product that has been
discontinued by National Semiconductor Corporation. The
datasheet is printed for reference information only.
e
Product Status
et
Datasheet Status
Table 43. Revision History
Revision #
(PDF Date)
bs
ol
Revisions/Comments
0.4 (April 2003)
0.6 (February 2004)
Initial Datasheet revised to include new radio and additional functionality. Several edits
have been made to functional, performance, and electrical details.
Updated RF performance values
Added 32 kHz frequency support.
0.7 (August 2004)
Updated General Description and Features with Audio
Updated Pinout Information
Added Audio Section
Updated Command Section with audio commands
0.71 (August 2004)
Reviewed Crystal Support Section
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LMX9820A
17.0 Datasheet Revision History
Added Audio block to application diagram
0.72 (October 2004)
Updated package size
Table 9 to Table 15 updated
Optional 32.768 kHz crystal support removed
Package outline drawing updated to 14.1mm width and 2.0mm height
0.73 (December 2004)
In Table 15, maximum output power range updated to +4dBm.
0.80 (March 2005)
Minor edits for clarity, language, units, formatting, etc. No functional changes.
0.81 (March 2005)
Minor changes in feature list
Table 2 updated
Added footnote to Table 10
Added description in chapter 6.2
Table 20 updated
0.82 (March 2005)
Added footnote to Table 13
Figure 22 updated
1.0 draft 1 (March 2005)
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Updated Power consumption Table 12
42
LMX9820A
17.0 Datasheet Revision History (Continued)
Table 43. Revision History
Revision #
(PDF Date)
Revisions/Comments
1.0 draft 2 (April 2005)
No functional Update
1.0 draft 3 (April 2005)
Updated C/I in Table 14
1.0 (April 2005)
1.1
No functional Update
Interim internal release.
NOPB added, 32.768kHz oscillator, WinBond and PCM slave info, sniff mode, Reference
to NKG3184A TCXO removed.
1.3 (September 2006)
In the pad descriptions table, H4 changed to RF GND not NC. Reference Schematic section added, Low power section completed, System schematic completed with 32KHz crystal option.
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1.2 (May 2006)
43
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LMX9820A
Note
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LMX9820A
e
18.0 Physical Dimension
NOTES:
PAD PITCH IS 1.00 MILLIMETER (.0394”) NON-ACCUMULATIVE.
et
UNLESS OTHERWISE SPECIFIED, ALL DIMENSIONS ARE IN MILLIMETER.
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TOLERANCE, UNLESS OTHERWISE SPECIFIED:
TWO PLACE (.00): ±.01
THREE PLACE (.000): ±.002
ANGULAR: ±1°
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Figure 30. Package with Sn-Pb Solder Bumps (metal housing).
45
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LMX9820A Bluetooth Serial Port Module
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Figure 31. Package with NOPB Solder Bumps (plastic housing).
National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves
the right at any time without notice to change said circuitry and specifications.
For the most current product information visit us at www.national.com.
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NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT AND GENERAL
COUNSEL OF NATIONAL SEMICONDUCTOR CORPORATION. As used herein:
1. Life support devices or systems are devices or systems which,
(a) are intended for surgical implant into the body, or (b) support
or sustain life, and whose failure to perform, when properly used
in accordance with instructions for use provided in the labeling,
can be reasonably expected to result in a significant injury to the
user.
2. A critical component is any component of a life support device
or system whose failure to perform can be reasonably expected
to cause the failure of the life support device or system, or to affect its safety or effectiveness.
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www.ti.com/audio
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amplifier.ti.com
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dataconverter.ti.com
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DLP® Products
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logic.ti.com
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power.ti.com
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Microcontrollers
microcontroller.ti.com
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