Rainbow Electronics BTM -140 User Manual
Page 4

BTM-130/140
Pin Functions
No.
Pin Name
Pin Type
Pin Description
1 GND
GND
Common
Ground
2 ANT Analogue
Connect to Antenna (RF Signal)
3 GND
GND
Common
Ground
4 AUDIO_OUT_PR
Analogue
Speaker output positive (Right channel)
5 AUDIO_OUT_N-
Analogue
Speaker output negative (Right channel)
6 AUDIO_OUT_PL
Analogue
Speaker output positive (Left channel)
7 AUDIO_OUT_NL
Analogue
Speaker output negative (Left channel)
8 AUDIO_IN_NL-
Analogue
Microphone & Audio Signal input negative(Left
9 AUDIO_IN_PL
Analogue
Microphone & Audio Signal input positive (Left
10 AUDIO_IN_PR
Analogue
Microphone & Audio Signal input positive (Right
11 AUDIO_IN_NR
Analogue
Microphone & Audio Signal input negative (Right
12 AIO0 Bi-directional
ADC/DAC input/output line / 32KHz sleep clock input
13 GND
GND
Common
Ground
14 AIO1 Bi-directional
ADC/DAC input/output line, Battery Monitor input
15 AIO3 Bi-directional
ADC/DAC input/output line
16
PIO6
Bi-directional
Programmable input/output line
17 PIO7/CLK_OUT Bi-directional
Programmable I/O line / Programmable clock output
18 PIO5/USB_DETACH Bi-directional
Programmable I/O line / Chip detachs from USB
19 PIO4/USB_ON Bi-directional
Programmable I/O line / USB wakes BC3 external
20
USBND
Bi-directional
USB data minus
21 USBDP Bi-directional
USB
data
plus
22
VDD_IN Power
VDD_IN
23 GND
GND
Common
Ground
24 UART_RTS
CMOS Output
UART request to send ,active low
25 UART_CTS
CMOS Input
UART clear to send ,active low
26 UART_TX
CMOS Output
UART TX Data
27 UART_RX
CMOS Input
UART RX Data
28 PCM_IN/SD_IN/SPDIF_IN CMOS
Input
PCM data input / I2S serial data in
29 PCM_CLK/SCK
Bi-directional
PCM data clock / I2S serial data clock
30 PCM_SYNC/WS
Bi-directional
PCM data sync / I2S ws ( typically SCK = 64*WS )
31 PCM_OUT/SD_OUT/SPDIF_OUT CMOS
Output
PCM data output / I2S serial data out
32
RESET
CMOS Input
Reset if high. must be high for>5ms to cause a reset
33
SPI_MOSI
CMOS Input
Serial Peripheral interface data input
34
SPI_CLK
CMOS Input
Serial Peripheral interface data clock
35
SPI_MISO
CMOS Output
Serial Peripheral interface data output
36 SPI_CSB CMOS
Input
Chip select for Synchronous Serial Interface active
37
PIO0
Bi-directional
Programmable input/output line
38
PIO1
Bi-directional
Programmable input/output line
39
PIO11
Bi-directional
Programmable input/output line
40
PIO9
Bi-directional
Programmable input/output line
41
PIO10
Bi-directional
Programmable input/output line
42
PIO8
Bi-directional
Programmable input/output line
43
PIO2
Bi-directional
Programmable input/output line
44 PIO3/USB_WAKE_UP Bi-directional
Programmable I/O line / Wake up pc in USB mode
45 AUX_DAC Analogue
Voltage
DAC
Output
46 GND
GND
Common
Ground