User Manual

BTM-222 Pin Function
Pin
No.
Pin Name Pin Type Description
1 GND GND
Common ground
2 PVCC Power
Power Amp. Power Supply(3.3V)
3 AIO(0) Bi-directional
Programmable I/O terminal
4 AIO(1) Bi-directional
Programmable I/O terminal
5 PIO(0) Bi-directional
Programmable I/O terminal
6 PIO(1) Bi-directional
Programmable I/O terminal
7 PIO(2) Bi-directional
Programmable I/O terminal
8 PIO(3) Bi-directional
Programmable I/O terminal
9 PIO(4) Bi-directional
Programmable I/O terminal, (Button Input, active high)
To press the button caused disconnection or reconnection. To
double click the button caused clear all original link records
then repairing. When user press the button more than 3
seconds, then it will restore the default RS232 setting
10 GND GND
Common ground
11 PIO(5) Bi-directional
Programmable I/O terminal, (Drive Data status led, active high, it will
flash 3 times when it reboot).
12 PIO(6) Bi-directional
Programmable I/O terminal, (RFCOMM connection status).
13 PIO(7) Bi-directional
Programmable I/O terminal, (Drive Link status led, active high, it will
flash 3 times when it reboot).
14 PIO(8) Bi-directional
Programmable I/O terminal, (Drive Power status led, active high, it
will flash 3 times when it reboot).
15 PIO(9) Bi-directional
Programmable I/O terminal, (Drive RS232 force on, active high).
16 RESETB CMOS input
Reset input of module, Active low
17 VCC Power
3.3V power supply input
18 GND GND
Common ground
19 GND GND
Common ground
20 USB_DP Bi-directional
USB data plus
21 USB_DN Bi-directional
USB data minus
22 PCM_SYNC Bi-directional
Synchronous data sync
23 PCM_IN CMOS input
Synchronous data input
24 PCM_OUT CMOS output
Synchronous data output
25 PCM_CLK Bi-directional
Synchronous data clock
26 UART_RX CMOS input
UART data input
27 UART_TX CMOS output
UART data output
28 UART_RTS CMOS output
UART request to send(active low)
29 GND GND
Common ground
30 UART_CTS CMOS input
UART clear to send(active low)
31 SPI_MOSI CMOS input
Serial Peripheral Interface data input
32 SPI_CSB CMOS input
Chip select for Synchronous Serial Interface(active low)
33 SPI_CLK CMOS input
Serial Peripheral Interface clock
34 SPI_MISO CMOS output
Serial Peripheral Interface data output
35 PIO(11) Bi-directional
Programmable I/O terminal
36 PIO(10) Bi-directional
Programmable I/O terminal
37 RF_IO Analogue
Antenna interface
38 GND GND
Common ground