Rainbow Electronics BTM -250 - Manual (Page 4)

BTM-240/250 Pin Functions
PIN NAME TYPE FUNCTION
1 GND GND Ground
2 PIO(0) Bi-directional Programmable Input / Output Line
3 AUDIO_IN_LP Analogue Microphone & Audio Signal input positive(Left channel)
4 AUDIO_IN_LN Analogue Microphone & Audio Signal input negative(Left channel)
5 AUDIO_IN_RP Analogue Microphone & Audio Signal input positive(Right channel)
6 AUDIO_IN_RN Analogue Microphone & Audio Signal inputnegative(Right channel)
7 AUDIO_OUT_RN Analogue Speaker & Audio Signal output negative(Right channel)
8 AUDIO_OUT_RP Analogue Speaker & Audio Signal output positive(Right channel)
9 AUDIO_OUT_LN Analogue Speaker & Audio Signal output negative(Left channel)
10 AUDIO_OUT_LP Analogue Speaker & Audio Signal output positive(Left channel)
11 GND GND Ground
12 GND GND Ground
13 +V_PA Power Power supply for PA (recommend 3.3V)
14 +1V8 Power Leave open, when VDD_IN 1.8V operate, please wire with VDD_IN
15 VDD_IN Power Power Input (normal 3.3V)
16 NC Reserved
17 AIO0 Bi-directional ADC/DAC Input/Output Line
18 AIO1 Bi-directional ADC/DAC Input/Output Line , Battery Monitor Input
19 AIO3 Bi-directional ADC/DAC Input/Output Line
20 PCM_SYNC/WS Bi-directional Synchronous Data Sync / I2S ws (typically SCK=64*WS)
21 PCM_IN/SD_IN CMOS Input Synchronous Data Input / I2S serial data in
22 PCM_OUT/SD_OUT CMOS Output Synchronous Data Output / I2S serial data out
23 PCM_CLK/SCK Bi-directional Synchronous Data Clock / I2S serial data clock
24 UART_CTS CMOS Input UART Clear To Send (Active Low)
25 UART_RTS CMOS Output UART Request To Send (Active Low)
26 UART_RX CMOS Input UART Data Input
27 UART_TX CMOS Output UART Data Output
28 PIO(4) Bi-directional Programmable Input / Output Line
29 PIO(5) Bi-directional Programmable Input/Output line
30 PIO(6) Bi-directional Programmable Input/Output line
31 PIO(7) Bi-directional Programmable Input/Output line
32 USB_DP Bi-directional USB Data Plus
33 USB_DN Bi-directional USB Data Minus
34 SPI_MOSI CMOS Input Serial Peripheral Interface Data Input
35 SPI_CSB CMOS Input Chip Select For Synchronous Serial Interface active low
36 GND GND Ground
37 GND GND Ground
38 SPI_CLK CMOS Input Serial Peripheral Interface Clock
39 SPI_MISO CMOS Output Serial Peripheral Interface Data Output
40 RESET CMOS Input Reset if high. must be high for >5ms to cause a reset
41 PIO(8) Bi-directional Programmable Input/Output Line
42 PIO(9) Bi-directional Programmable Input/Output Line
43 PIO(10) Bi-directional Programmable Input/Output Line
44 PIO(11) Bi-directional Programmable Input/Output Line
45 PIO(3) Bi-directional Programmable Input/Output Line
46 PIO(2) Bi-directional Programmable Input / Output Line
47 PIO(1) Bi-directional Programmable Input/Output Line
48 GND GND Ground
49 RF_IO Analogue Antenna Interface
50 GND GND Ground