Rainbow Electronics BTM -22х - Manual (Page 6)

BTM-220 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, RX Enable
6 PIO(1) Bi-directional Programmable I/O terminal, TX Enable
7 PIO(2) Bi-directional Programmable I/O terminal, USB_PULL_UP
8 PIO(3) Bi-directional Programmable I/O terminal, USB_WAKE_UP
9 PIO(4) Bi-directional Programmable I/O terminal, USB_ON
10 GND GND Common ground
11 PIO(5) Bi-directional Programmable I/O terminal, USB_DETACH
12 PIO(6) Bi-directional Programmable I/O terminal, CLK_REQ
13 PIO(7) Bi-directional Programmable I/O terminal
14 PIO(8) Bi-directional Programmable I/O terminal
15 PIO(9) Bi-directional Programmable I/O terminal
16 RESET CMOS input Reset input of module, Active low reset
17 VCC Power Module 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