Pin define(TOP PIN MAP)
No
Pin Name
I/O
Description
1
CTS
I
Bluetooth UART Clear to Send.Active-low clear.
2
VDD
I
Positive Input for the internal regulator (3.0 ~ 3.6V)
3
TXD
O
Bluetooth UART Serial Output.
4
RTS
O
Bluetooth UART Request to Send.
Active-low request.
5
RXD
I
Bluetooth UART Serial Input.
6,7,8,12
GND
-
Ground.
9
SDA
I/O I2C interface DATA
10
SCL
O
I2C interface Clock
11
RESET
I
Reset if low. Input debounced so must be low for >5ms to
cause a reset
1. VDD
2.RESET
3.RTS
4.CTS
5.TXD
6.GND
7.RXD
8.GND
9. SCL
10. SDA