RN52 Datasheet, PDF (5/26 Pages) Microchip Technology – Bluetooth Audio Module

RN52
TABLE 1-4: PIN DESCRIPTION⁽¹⁾ (SHEET 2 OF 3)
Pin Symbol
5 GPIO4
6 GPIO5
7 GPIO12
8 GPIO13
9 GPIO11
10 GPIO10
11 GPIO9
12 USBD-
13 USBD+
14 UART_RTS
15 UART_CTS
16 UART_TX
17 UART_RX
18 GND
19 GPIO7
20 GPIO6
21 PWREN
22 VDD
23 PCM_IN
I/O Type
Description
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.
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
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
Bidirectional
USB data minus
Bidirectional
USB data plus with selectable internal 1.5 Kohm
pull-up resistor
CMOS output, tri-state, with UART request to send active low
weak internal pull-up
CMOS input with weak
internal pull-down
UART clear to send active low
CMOS output, tri-state, with UART data output
weak internal pull-up
CMOS input with weak
internal pull-down
UART data input
Ground
Ground
Bidirectional with program- Driving this pin low sets the UART baud rate to
mable strength internal
9,600. By default, the pin is high with a baud rate
pull-up/down
of 115,200
Bidirectional with program- Programmable I/O
mable strength internal
pull-up/down
Analog
Pull high to power up RN52
3.3-V power input
3.3V power input
CMOS input, with weak
internal pull down
Synchronous data input, configurable for
SPDIF_IN or SD_IN (I²S)
Directio
n
Input
I/O
I/O
I/O
I/O
I/O
Input
I/O
I/O
Output
Input
Output
Input
I/O
I/O
Input
Input
Defau
lt
Low
High
High
High
High
High
High
High
High
Low
 2015 Microchip Technology Inc.
DS70005120A-page 5