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LM740Page 1 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
Overview
Features
Applications
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna
Part NoRevised
Product
27/FEB/2015740-0411
LM740
Bluetooth v2.1 + EDR compliant firmware
Class 2 device with up to 25 m range in open space
AT Command interface available forHFP/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 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
Integrated 16 MB flash memory
True Wireless Stereo Support
APTX Support
Support UART, PIO and USB Host Interface
CSR Bluecore 05 Multimedia External Flash(BC05-MM Ext) chipset
Lead free - RoHS compliant
Small Size : 16mm x 15mm x 2.2mm
High Quality Stereo Wireless Headsets
High Quality Mono Headsets
Vehicle Infotainment Systems
Wireless Speakers
VoIP Handsets
Bluetooth Enabled Automotive Wireless Gateways
Handsfree kits
LM740 is LM Technologies Ltd Class 2 Bluetooth Multimedia module with external antenna. This module is a CSR Bluecore 5 Multimedia External BC05 MM chip based 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 over UART 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.
15mm
16m
m
General Specification
Packaging Options
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna
Part NoRevised
Product
27/FEB/2015740-0411
LM740
Tape and ReelPart No 740-0413
LM740 with Bluetooth 2.1 +EDR firmware
Tray PackagingPart No 740-0412
LM740 with Bluetooth 2.1 +EDR firmware
IndividualPart No 740-0411
LM740 with Bluetooth 2.1 +EDR firmware
Chipset
Power Classification
Module Type
Bluetooth Specification
Frequency
Temperature Range
Data Rate
Range
Rx Sensitivity
Antenna
Voltage operation
Current Consumption (standby mode)
Current Consumption (ACL Connection, master role)
Current Consumption (data transfer, master role)
Current Consumption (ACL Connection, slave role)
Current Consumption (data transfer, slave role)
Power Output
Default Firmware
Size
Bluetooth Profile
Interface
Digital Audio Bus
Codec
DSP Processor
Flash Memory
RoSH Compliant
CSR Bluecore 5 Multimedia External BC05 MM
Class 2
Surface Mount SMT
Core v2.1 + EDR
2402 - 2480 MHz
-20° C to +70° C
Up to 3 Mbps in HCI Mode
25m in open space
-82 dBm typical
External Antenna
1.8 - 3.6v
0.06 mA
4.4 mA
9.1 mA
15 mA
21 mA
+ dBm
LM-SRX-ATC-YYYYMMDD (AT Command Firmware), LM-RX-HIC
(PIO firmware)
16mm x 15mm x 2mm
Handsfree Profile (HFP), Advanced Audio Distribution Profile
(A2DP), Audio Video Remote Control (AVRCP), Serial Port Profile
(SPP), Phone Book Access Profile (PBAP)
UART, PIO’s, USB Host Interface
PCM, I2S or SPDIF
Yes, Integrated 16 bit Stereo Audio CODEC
Embedded Kalimba DSP Co-Processor
16MB
Yes
LM740Page 2 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
User Guides, Manuals and Widcomm Configuration Software available to download via our website - http://www.lm-technologies.com/support/downloads
Pin Assignments
Block Diagram
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Product
27/FEB/2015740-0411
LM740
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
AGND
SPKR_B_P
SPKR_B_N
SPKR_A_P
SPKR_A_N
VDD_PIO / VDD_PADS
GND
ANT
GND
AUX_DAC
PIO 0
PIO 1
PIO 3
PIO 2
Type
AGND
Analogue
Analogue
Analogue
Analogue
VDD
GND
Analogue
GND
Analogue
I/O
I/O
I/O
I/O
Description
Analog Ground
Speaker output positive, right
Speaker output positive, right
Speaker output positive, left
Speaker output negative, left
Positive supply for PIO, AUX DAC and all other digital Input / Output ports
Common Ground
Connect to 50 ohm antenna (RF signal)
Common Ground
8 bit voltage output DAC
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
LM740Page 3 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
ANT
Balun +BFP
DC / DCConverter &Charger
X’tal 26Mhz
VDD 1V8
SPI
Charger Input4.5V - 6.5V VBAT 2.5V - 4.4V
Interface
UART
PIO
PCM/112S
AUDIO
USB
16MbitFlash
BC05MM
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Product
27/FEB/2015740-0411
LM740
Pin Assignments Continued
Pin
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
Name
AIO 1
AIO 0
USB_DN
USB_DP
VDD_USB
UART_RX
UART_TX
UART_RTS
UART_CTS
PIO 10
PIO 9
PIO 11
PIO 12
GND
PIO 8
PIO 7
PIO 4
PIO 5
PIO 6
RESET #
PCM_CLK
PCM_IN
PCM_SYNC
PCM_OUT
SPI_MOSI
SPI_CS #
SPI_CLK
SPI_MISO
GND
LED 1
LED 0
1V8
LX
VDD_CHG
VBAT
Type
I/O
I/O
I/O
I/O
VDD
CMOS Input
CMOS Output
CMOS Output
CMOS Input
I/O
I/O
I/O
I/O
GND
I/O
I/O
I/O
I/O
I/O
CMOS Input
I/O
CMOS Input
I/O
CMOS Output
CMOS Input
CMOS Input
CMOS Input
CMOS Output
GND
Open Drain Output
Open Drain Output
VDD
Switch Mode power regulator output
Charger Input
Battery Terminal Positive
Description
Analog Programmable Input / Output Line
Analog Programmable Input / Output Line
USB Data Minus
USB Data Plus
Positive Supply for UART / USB Ports
UART Rx Data
UART Tx Data
UART Request to Send, Active Low
UART Clear to Send, Active Low
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Common Ground
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Programmable Input / Output Line
Rest if low. Input debounced so must be low >5ms to cause reset
Synchronous Data Clock
Synchronous Data Input
Synchronous Data Sync
Synchronous Data Output
SPI Data Input
Chip select for serial Peripheral Interface (SPI), active low
SPI Clock
SPI Data Output
Common Ground
LED Driver
LED Driver
1V8 Input
Switch Mode power regulator output
Lithium Ion/Polymer battery charger input
Lithium Ion/Polymer battery positive terminal. Battery O/I to SMR
LM740Page 4 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
RF Characteristics
Min
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Max
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Unit
dBm
dBm
dB
dB
dB
dB
dB
dB
dB
dB
dBm
dBm/Hz
dBm
dB
dB
kHz
dBm
dBm
dBm
kHz
kHz
kHz
kHz/50μ
kHz
kHz
dBm
dBm
Typ
-82
-82
-82
>=-10
7
-6
-7
-21
-39
-43
-47
-17
-30
-156
1
35
0.5
916
-30
-50
<=-50
166
154
0.92
10
8
8
10
-50
-55
Bluetooth Specificaiton
<=-70
>=-20
<=11
<=0
<=0
<=-20
<=-30
<=-40
<=-40
<=-9
>=-39
-6 to +4
>=16
-
<=1000
<=-20
<=-40
<=-40
140<f1avg<175
115
>=0.80
+/-75
<=20
<=25
<=40
<=-30
<=-30
Characteristic
Sensitivity at 0.1%
BER for all
packet types
Maximum received signal at 0.1% BER
C/I co-chanel
Adjacent channel selectivity C/I F=F0+1 Mhz
Adjacent channel selectivity C/I F=F0-1 Mhz
Adjacent channel selectivity C/I F=F0+2 Mhz
Adjacent channel selectivity C/I F=F0-2 Mhz
Adjacent channel selectivity C/I F=F0-3 Mhz
Adjacent channel selectivity C/I F=F0+5 Mhz
Adjacent channel selectivity C/I F=FImage
Maximum Level of inter-modulation interferers
Spurious output level
Maximum RF Transmit Power
RF power control resolution
RF power control range
20 dB Bandwidth for modulated carrier
Adjacent channel trasmit power F=F0+2 Mhz
Adjacent channel trasmit power F=F0+3 Mhz
Adjacent channel trasmit power F=F0+> 3Mhz
Δf1 avg Maximum Modulation
Δf2 max Minimum Modulation
Δf1 avg / Δf2 avg
Initial Carrier Tolerance
Drift Rate
Drift (Single Slot Packet)
Drift (Five Slot Packet)
2nd Harmonic Content
3rd Harmonic Content
Frequency
2.402
2.441
2.480
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Transmitter: VDD-1.8V, Temperature= +20°C
Product
27/FEB/2015740-0411
LM740
Pin Assignments Continued
Pin
50
51
52
53
54
55
Name
VREGENABLE_H (Power_On)
MIC_BIAS
MIC_B_P
MIC_B_N
MIC_A_P
MIC_A_N
Type
Analogue
Analogue
Analogue
Analogue
Analogue
Analogue
Description
Take high to enable high-voltage linear regulator and swich-mode regulator
Microphone Bias
Microphone Bias positive, right
Microphone Bias negative, right
Microphone Bias positive, left
Microphone Bias negative, left
LM740Page 5 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Product
27/FEB/2015740-0411
LM740
All measurements in mm
Dimensions
LM740Page 6 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
PCB LAYOUT (TOP VIEW)
Design to MicroStrip Line
1.5
0.6*1.4
11
1.50.6
1.5
15
12=12*1
TOP VIEWBOTTOM VIEW
1 1
16
6.5
10
2.2
4=4*
12=
2*15=
5*1
14=1
4*1
1.5
0.7
11
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Product
27/FEB/2015740-0411
LM740
LM740Page 7 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]
5 5
4 4
3 3
2 2
1 1
DD
CC
BB
AA
BLUE
RED
Low
ESR
Low
ESR
MIC
Prog
ram
min
g
Opt
ion
(VR
EG)
The
exte
rnal
indu
ctor
(L1)
mus
t hav
e an
ESR
in th
era
nge
0.3
- 0.7
Ω
<Rev
Cod
e>
LM74
0 Ap
plica
tion
Sche
mat
ic
B
11
Tues
day,
Apr
il 07,
200
9
Title
Size
Doc
umen
t Num
ber
Rev
Dat
e:Sh
eet
of
Powe
r_on
SPI_
CLK
MFB
MFB
SPKR
_L_N
SPKR
_R_N
VOL-
LED1
SPKR
_L_N
SPI_
MO
SI
REW
LED0
REW
SPKR
_R_P
LED0
SPKR
_R_N
RES
ETB
LED1
SPKR
_R_P
VOL+
VOL+
RES
ETB
FF
MIC
_A_N
Powe
r_on
MIC
_A_P
SPI_
CSB
BIAS
_MIC
FF
SPKR
_L_P
Int_
Cha
rge
VOL-
Int_Charge
SPI_
MIS
O
BIAS
_MIC
MIC
_A_N
MIC
_A_P
SPKR
_L_P
PIO
5
PIO
5
1V8
AGN
D
VBAT
VDD
_AM
P
DG
ND
VBAT
AGN
D
1V8
AGN
D
AGN
D
AGN
D
AGN
D
DG
ND
DG
ND
1V8
VBAT
VDD
_AM
P
DG
ND
DG
ND
1V8
AGN
D
1V8
VBAT
AGN
D
AGN
DAG
ND
DG
ND
AGN
D
DG
ND
1V8
AGN
D
1V8
1V8
DG
ND
DG
ND
DG
ND
AGN
D
1V8
DG
ND
1V8
AGN
D
DG
ND
1V8
VBAT
AGN
D
AGN
D
AGN
D
DG
ND
DG
ND
DG
ND
DG
ND
1V8
R10
22K
1%
C17
NC
J4 Rig
ht
12
C15
4.7u
F
B10R
/060
3
R13
22K
1%
C10
1uF/
0603
L3 15nH
R6
10K
J1
1 2
C19
1uF/
0603
JD1
DC
JAC
K
231
XC62
09F3
32M
RNU
2
1
2
3
5 4Vi
n
GND
CE
Vout
BTP
C20
1uF/
0603
PS5
13 2
41
3 24
C3
15pF
C1
NC
/060
3
R22
1M
R27
10K
C16
NC
R5
10K
C5
10uF
/16V
/120
6
R11
39R
+
C23
220u
F/6.
3V/C
PS7
13 4
21
3 42
J5 Left
12R
26
10K
+
C18
220u
F/6.
3V/C
C26
0.1u
F
L1 22uH
LED
1
3 2
14
R21
39R
R16
10K
R2
470R
R3
470R
C2
1uF/
0603
R15
10K
C9
1uF/
0603
C8
10uF
/16V
/120
6
R1
2.2K
R25
10K
C7
0.1u
F
L5 0R
R9
22K
1%
R24
22K
1%
C4
15pF
R4
100K
R23
22K
1%PS
?1
3 24
13 2
4
C13
10uF
/16V
/120
6
C22
0.1u
F
R12
1M
C27
1uF/
0603
PS4
13 2
41
3 24
ANT1
1
PS3
13 2
41
3 24
C14
0.1u
F
U1
LM-7
40
1 10 1312 14643 115
20
338
54
36
27
2829
26
232221
2524
1716
1918
9
15
3134 32
46
42 3041 3839 37
43
40 3572
47
4544
484950
535251
55
AGN
D
AUX_
DAC
PIO
3PI
O1
PIO
2
PIO
_PO
WER
SPKR
_A_P
SPKR
_B_N
PIO
0
SPKR
_A_N
UART_RX
PIO
6R
F_IO
MIC_A_P
PCM
_IN
PIO12
GN
DPI
O8
PIO11
UART_CTSUART_RTSUART_TX
PIO9PIO10
USB_DNAIO0
VDD_USBUSB_DP
GN
D
AIO1
PIO
4
RES
ETB
PIO
5
1V8
SPI_
MIS
O
PIO
7
SPI_
CLK
PCM
_OU
TSP
I_M
OSI
PCM
_SYN
C
GND SPI_
CS#
PCM
_CLK
GN
D
SPKR
_B_P
LX
LED0LED1
VDD_CHGVBAT
POWER_ON
MIC_B_NMIC_B_P
MIC_BIAS
MIC_A_N
R18
22K
1%
PS2
13 4
21
3 42
R7
100K
C12
0.1u
F
R?
10K
L2 15nH
R14
22K
1%
PS1
13 4
21
3 42
C11
15pF
J2
BAT
CO
N
2 1
R20
22K
1%
C21
0.1u
F
PS6
13 2
41
3 24
C24
1uF/
0603
J3 CO
N6
321 654
L4 0R
U3
TPA6
112A
2
19
23478
10 5 6
VO1
VO2
IN1-
IN1+
BYPA
SS
IN2+
IN2-
VDD
VSS
shut
down
C25
1uF/
0603
LM74
0
Revision History
LM740 Bluetooth Audio ModuleClass 2 Module CSR BC05 MM - External Antenna Part No
Revised
Product
27/FEB/2015740-0411
LM740
1.0 17/NOV/2011 First version with new layout
1.1 20/MAR/2012 Some minor changes in data sheet content
1.2 12/FEB/2014 1. Packaging information corrected
2. Revision information added
1.3 27/FEB/2015 Updated Datasheet
LM740Page 8 of 8 +44(0) 207 428 2647 www.lm-technologies.com | [email protected]