RN52

DS70005120A-page 6

 2015 Microchip Technology Inc.

24

PCM_OUT

CMOS output, with weak

internal pull down

Synchronous data output, configurable for

Output

25

PCM_SYNC Bidirectional with weak

internal pull down

Output

26

PCM_CLK

CMOS input, with weak

internal pull down

Output

27

GND

Ground

Ground

28

SPI_SS

CMOS input with weak

internal pull-up

Chip select for Synchronous Serial Interface

active low

Input

29

SPI_MISO

CMOS output, tri-state, with

weak internal pull-down

Serial Peripheral Interface (SPI) output

Output

30

SPI_CLK

Input with weak internal

pull-down

SPI clock

Input

31

SPI_MOSI

CMOS input, with weak

internal pull-down

SPI input

Input

32

LED1

Open drain output

Drives an LED. For the RN-52-EK Board, this

signal drives the red LED

Output

33

LED0

Open drain output

Drives an LED. For the RN-52-EK Board, this

signal drives the blue LED

Output

34

MIC_BIAS

Analog

Microphone bias

Output

35

MIC_L+

Analog

Microphone input positive, left

Input

36

MIC_R+

Analog

Microphone input positive, right

Input

37

MIC_L-

Analog

Microphone input negative, left

Input

38

MIC_R-

Analog

Microphone input negative, right

Input

39

AGND

Analog

Ground connection for audio

40

SPK_R-

Analog

Speaker output negative (right side)

Output

41

SPK_L-

Analog

Speaker output negative (left side)

Output

42

SPK_R+

Analog

Speaker output positive (right side)

Output

43

SPK_L+

Analog

Speaker output positive (left side)

Output

44

GND

Ground

Ground

45

GND

Ground

RF ground

46

GND

Ground

RF ground

47

GND

Ground

RF ground

48

GND

Ground

RF ground

49

GND

Ground

RF ground

50

GND

Ground

RF ground

Note 1:

All GPIO pins default to input with weak pull-down.

2:

Refer to the “Bluetooth Audio Module Command Reference User’s Guide” (DS50002154) and the

“RN52SRC Bluetooth Audio Module Command Reference User’s Guide” (DS50002343) for more

information about the behavior of the pin and optional features that can be enabled.

TABLE 1-4:

Pin

Symbol

I/O Type

Description

Directio

n

Defau

lt