RN52 datasheet(5/26 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS70005120A-page 5

RN52

GPIO4

Digital

Factory Reset mode. To reset the module to the

factory defaults, GPIO4 should be high on

power-up and then toggle low, high, low, high

with a 1 second wait between the transitions.

During runtime, the module will enter voice com-

mand mode if this pin is driven low.

Reserved. Not available for reconfiguring as a

general purpose IO pin.

Input

Low

GPIO5

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

GPIO12

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

GPIO13

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

GPIO11

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

GPIO10

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

GPIO9

Digital

When you drive this signal low, the module’s

UART goes into Command mode. If this signal is

asserted high, the UART is in Data mode.

Reserved

Input

High

USBD-

Bidirectional

USB data minus

I/O

USBD+

Bidirectional

USB data plus with selectable internal 1.5 Kohm

pull-up resistor

I/O

UART_RTS CMOS output, tri-state, with

weak internal pull-up

UART request to send active low

Output

UART_CTS CMOS input with weak

internal pull-down

UART clear to send active low

Input

UART_TX

CMOS output, tri-state, with

weak internal pull-up

UART data output

Output

UART_RX

CMOS input with weak

internal pull-down

UART data input

Input

GND

Ground

GPIO7

Bidirectional with program-

mable strength internal

pull-up/down

Driving this pin low sets the UART baud rate to

9,600. By default, the pin is high with a baud rate

of 115,200

I/O

High

GPIO6

Bidirectional with program-

mable strength internal

pull-up/down

Programmable I/O

I/O

High

PWREN

Analog

Pull high to power up RN52

Input

Low

VDD

3.3-V power input

3.3V power input

PCM_IN

CMOS input, with weak

internal pull down

Synchronous data input, configurable for

SPDIF_IN or SD_IN (I2S)

Input

TABLE 1-4:

PIN DESCRIPTION(1) (SHEET 2 OF 3)

Symbol

I/O Type

Description

Directio

Defau

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