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Rainbow Electronics BTM -140 User Manual

Page 4

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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