User's Manual

Enhanced Class 1 Bluetooth v2.1 Module
User’s Guide
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www.lairdtech.com/wireless
7
CONN-GUIDE-BT740_v0.2
2.3 Pin Definitions
Table 2-2: Pin definitions
Pin
Signal
Description
Comment
1
GND
2
SPI_MOSI
SPI bus serial I/P
See Note 0
3
GPIO6
I/O for host
4
GPIO7
I/O for host
5
RESET
Module reset I/P
See Note 0
6
SPI_CLK
SPI bus clock I/P
See Note 0
7
PCM_CLK
PCM clock I/P
8
PCM_SYNC
PCM sync I/P
9
PCM_IN
PCM data I/P
10
PCM_OUT
PCM Data O/P
11
VCC_5VIN
3.0 V < VIN < 5.0 V
12
GND
13
VCC_3V3
3.3 V Monitor
See Note 0
14
Analogue 1
1.8 V max
15
GND
16
UART_DSR
UART_DSR I/P
17
UART_DCD
UART_DCD I/P or O/ P
18
GPIO_9
I/O for host
19
GPIO_8
I/O for host
20
GND
21
Analogue 00
1.8 V max
22
UART_RX
Receive data I/P
23
UART_TX
Transmit data O/P
24
UART_RTS
Request to Send O/P
25
UART_CTS
Clear to Send I/P
26
USB_D+
Not used for AT module variants
27
USB_D-
Not used for AT module variants
28
UART_RI
Ring Input or Output
29
GPIO_3/UART_DTR
I/O for host/UART_DTR
30
GPIO_5
I/O for host
31
GPIO_4
I/O for host
32
SPI_CSB
SPI bus chip select I/P
See Note 0
33
SPI_MISO
SPI bus serial O/P
See Note 0
34
GND
Only on uFL version
See Note 0
35
RF_OUT
Only on uFL version
See Note 0
36
GND
Only on uFL version
See Note 0