lm740 bluetooth multimedia module class 2 …this module is ideal for multimedia applications in...

LM740 of 8

+44(0) 207 428 2647 www.lm-technologies.com | [email protected]

3 Applications2 Features

LM740 Bluetooth Multimedia ModuleClass 2 Module with CSR BC05 MM Ext Chip

• Bluetooth v2.1 + EDR compliant firmware• Class 2 device with up to 25 m range in open space • AT Command interface available for HFP/HSP/A2DP/AVRCP firmware• HFP/HSP/A2DP/AVRCP profiles supported. SPP/PBAP firmware under development• Development kit (LM556) for LM740 available for development• Application Schematic for LM740 available for development• Integrated Switched-mode regulator• Embedded Kalimba DSP Co-processor• Integrated battery charging option• Integrated 16-bit Stereo Audio CODEC 95dB SNR for DAC• UART baud rate upto 921600 bps supported• Enhanced Audibility and Noise cancellation• Support UART and USB Host Interface• Integrated 16 MB flash memory• CSR Bluecore 05 Multimedia External Flash (BC05-MM Ext) chipset• Lead free - RoHS compliant• Small Size : 16 mm x 15 mm x 2.2 mm

Product: LM740Part No: 740-0411Datasheet Rev1.0/21-05-12

• High Quality Stereo Wireless Headsets• High Quality Mono Headsets • Vehicle Infotainment Systems• Wireless Speakers• VoIP Handsets• Bluetooth Enabled Automotive Wireless Gateways• Handsfree kits

1 General Description

LM740 is LM Technologies Ltd Class 2 Bluetooth Multimedia module with external antenna. This module is a CSR Bluecore 5- Multimedia External (BC05 MM-Ext) chipbased surface mount module available with Bluetooth Handsfree (HFP), Headset (HSP),Advanced Audio Distribution Profile (A2DP) and Audio Video Remote Control Profile(AVRCP) combo firmware. The firmware can be configured via AT Commands overUART interface or PIO interface via push buttons.

This module is ideal for multimedia applications in vehicle infotainment systems,handsfree kits, headsets, Bluetooth speakers and Bluetooth Stereo Headsets.

This module is available with Bluetooth 2.1+EDR compliant firmware. Firmware for A2DP Speakers, Stereo Transmitter is available upon request.

4 Packaging Options

LM740 with BT2.1 + EDR firmware

Tape and Reel Part No 740-0413

Tray PackagingPart No 740-0412

LM740 with BT2.1 + EDR firmware

LM740 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]


5 Electrical Characteristics

Absolute Maximum RatingsRatings Min Max Unit

Storage Temperature -40 +85 °CSupply Voltage (VBAT) -0.4 +4.4 V

Supply Voltage (VDD_CHG) -0.4 +6.5 VSupply Voltage (VDD_PIO,VDD_PADS, VDD_USB)

-0.4 +3.6 V

VREGENABLE_H(POWER_ON) -0.4 +4.9 V

Recommended Operating ConditionsOperating Condition Min Max Unit

Operating Temperature Range -20 +70 °CSupply Voltage (VBAT) +2.5 +4.4 V

Supply Voltage(VDD_CHG) +4.5 +6.5 VSupply Voltage(VDD_PIO,VDD_PADS, VDD_USB)*

+1.8 +3.6 V*For UART Application, Supply Voltage (VDD_USB) is 1.8V~3.6V *For USB Application, Supply Voltage (VDD_USB ) is 3.3V

Power Consumption (16 MHz operation)Role Connection Audio Packet Type Description Current Unit- Stand-by - Host Connection 0.06 mA- Page Scan - Interval = 1280 ms 0.45 mA- Inquiry and Page Scan - Inquiry Scan = 1280 ms

Page Scan = 1280 ms0.84 mA

Master ACL - No Traffic 4.4 mAMaster ACL - File Transfer Tx 9.1 mAMaster ACL - Sniff = 40 ms 1.8 mAMaster ACL - Sniff = 1280 ms 0.19 mAMaster eSCO EV3 - 22 mAMaster eSCO EV3 Setting S1 24 mAMaster eSCO 2 EV3 Setting S2 22 mAMaster eSCO 2 EV3 Setting S3 17 mAMaster eSCO EV5 - 16 mAMaster SCO HV1 - 40 mAMaster SCO HV3 - 22 mAMaster SCO HV3 Sniff = 30 ms 21 mASlave ACL - No Traffic 15 mASlave ACL - File Transfer Rx 21 mASlave ACL - Sniff = 40 ms 1.6 mASlave ACL - Sniff = 1280 ms 0.26 mASlave eSCO EV3 - 25 mASlave eSCO EV3 Setting S1 27 mASlave eSCO 2 EV3 Setting S2 27 mASlave eSCO 2 EV3 Setting S3 24 mASlave eSCO EV5 - 22 mASlave SCO HV1 - 39 mASlave SCO HV3 - 26 mASlave SCO HV3 Sniff = 30 ms 22 mA

LM740 of 8

6 Block Diagram

7 Pin Assignments



VDD 1V8

BC05MM

16 MbitFlash

X’tal 26 MHz

Interface

Balun +BFP

DC/DC Converter &

Charger

ANT

SPI

UART

PIO

PCM/I2S

AUDIO

USB

Charger Input 4.5V - 6.5V VBAT 2.5V - 4.4V

Pin Number Name Type Description1 AGND AGND Analog Ground2 SPKR_B_P Analogue Speaker output positive, right3 SPKR_B_N Analogue Speaker output negative, right 4 SPKR_A_P Analogue Speaker output positive, left5 SPKR_A_N Analogue Speaker output negative,left6 VDD_PIO/

VDD_PADSVDD Positive supply for PIO, AUX DAC

and all other digital Input/ Outputports

7 GND GND Common Ground8 ANT Analogue Connect to 50 ohm antenna (RF

signal)9 GND GND Common Ground

10 AUX_DAC Analogue 8 bit voltage output DAC11 PIO 0 I/O Programmable Input/ Output Line12 PIO 1 I/O Programmable Input/ Output Line 13 PIO 3 I/O Programmable Input/ Output Line 14 PIO 2 I/O Programmable Input/ Output Line

LM740 of 8



7 Pin Assignments (Contd..)

Pin Number Name Type Description15 AIO 1 I/O Analogue Programmable Input/

Output Line 16 AIO 0 I/O Analogue Programmable Input/

Output Line 17 USB_DN I/O USB Data Minus18 USB_DP I/O USB Data Plus19 VDD_USB VDD Positive Supply for UART/USB

Ports 20 UART_RX CMOS Input UART Rx Data21 UART_TX CMOS Output UART Tx Data22 UART_RTS CMOS Output UART Request to Send, Active Low23 UART_CTS CMOS Input UART Clear to Send, Active Low24 PIO 10 I/O Programmable Input/ Output Line25 PIO 9 I/O Programmable Input/ Output Line26 PIO 11 I/O Programmable Input/ Output Line27 PIO 12 I/O Programmable Input/ Output Line28 GND GND Common Ground29 PIO 8 I/O Programmable Input/ Output Line30 PIO 7 I/O Programmable Input/ Output Line31 PIO 4 I/O Programmable Input/ Output Line32 PIO 5 I/O Programmable Input/ Output Line33 PIO 6 I/O Programmable Input/ Output Line34 RESET# CMOS Input Reset if low. Input debounced so

must be low for >5ms to cause areset

35 PCM_CLK I/O Synchronous Data Clock 36 PCM_IN CMOS Input Synchronous Data input37 PCM_SYNC I/O Synchronous Data Sync38 PCM_OUT CMOS Output Synchronous Data Output39 SPI_MOSI CMOS Input SPI Data Input40 SPI_CS# CMOS Input Chip Select for Serial Peripheral

Interface(SPI), active low 41 SPI_CLK CMOS Input SPI Clock42 SPI_MISO CMOS Output SPI Data Output43 GND GND Common Ground44 LED 1 Open Drain Output LED Driver45 LED 0 Open Drain Output LED Driver46 1V8 VDD 1V8 Input47 LX Switch Mode power

regulator output Switch mode power regulator output

48 VDD_CHG Charger Input Lithium Ion/Polymer battery charger input

49 VBAT Battery TerminalPositive

Lithium Ion/ Polymer batterypositive terminal. Battery charger output and input to switch mode regulator

LM740 of 8


Product: LM740Part No: 740-0411Datasheet Rev1.0/21-05-127 Pin Assignments (Contd..)

Pin Number Name Type Description50 VREGENABLE_

H (POWER_ON)Analogue Take high to enable high-voltage

linear regulator and switch-moderegulator

51 MIC_BIAS Analogue Microphone Bias52 MIC_B_P Analogue Microphone Bias positive, right53 MIC_B_N Analogue Microphone Bias negative, right54 MIC_A_P Analogue Microphone Bias positive, left55 MIC_A_N Analogue Microphone Bias negative, left

8 RF Characteristics

Transmitter : VDD=1.8V, Temperature = +20°C

Characteristic Min Typ Max BluetoothSpecification

Unit

Maximum RF Transmit Power - 1 - -6 to +4 dBmRF power control range - 35 - >=16 dBRF power range control resolution - 0.5 - - dB20dB Bandwidth for modulated carrier - 916 - <=1000 kHzAdjacent channel transmit powerF=F0 ±2MHz

- -30 - <=-20 dBm

Adjacent channel transmit powerF=F0 ±3 MHz

- -50 - <=-40 dBm

Adjacent channel transmit power F=F0± > 3 MHz

- <=-50 - <=-40 dBm

Δf1 avg Maximum Modulation - 166 - 140<f1avg<175 kHzΔf2 max Minimum Modulation - 154 - 115 kHzΔf1 avg/ Δf2 avg - 0.92 - >=0.80Initial Carrier Tolerance - 10 - +/-75 kHzDrift Rate - 8 - <=20 kHz/50µDrift(Single Slot Packet) - 8 - <=25 kHzDrift(five slot packet) - 10 - <=40 kHz2nd Harmonic Content - -50 - <=-30 dBm3rd Harmonic Content - -55 - <=-30 dBm

LM740 of 8


Product: LM740Part No: 740-0411Datasheet Rev1.0/21-05-128 RF Characteristics (Contd..)

Receiver : VDD=1.8V, Temperature = +20°C

Characteristic Frequency Min Typ Max Bluetooth Specification

Unit

Sensitivity at 0.1% BER for all packet types

2.402 - -82 - <=-70 dBm2.441 - -82 -2.480 - -82 -

Maximum received signal at 0.1% BER - >=-10 - >=-20 dBmC/I co-channel - 7 - <=11 dBAdjacent channel selectivity C/IF=F0+1 MHz

- -6 - <=0 dB

Adjacent channel selectivity C/IF=F0-1 MHz

- -7 - <=0 dB

Adjacent channel selectivity C/IF=F0+2 MHz

- -21 - <=-20 dB

Adjacent channel selectivity C/I F=F0-2 MHz

- -39 - <=-30 dB

Adjacent channel selectivity C/I F=F0-3MHz

- -43 - <=-40 dB

Adjacent channel selectivity C/IF=F0+5 MHz

- -47 - <=-40 dB

Adjacent channel selectivity C/IF=FImage

- -17 - <=-9 dB

Maximum Level of inter-modulationinterferers

- -30 - >=-39 dBm

Spurious output level - -156 - dBm/Hz

LM740 of 8


Product: LM740Part No: 740-0411Datasheet Rev1.0/21-05-129 Dimensions (unit mm)

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lm740 bluetooth multimedia module class 2 …this module is ideal for multimedia applications in...

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