SPBT2532C2.AT2

Hardware specifications

Doc ID 023461 Rev 1

13/27

5.7

Pin assignment

Table 7.

Pin assignment

Name

Type

Pin#

Description

5 V

tolerant

Initial state

UART interface

RXD

I

13

Receive data

ADC 3

Y

TXD

O

14

Transmit data

ADC 2

Y

RTS

O

12

Request to send (active low)

UART Rx

Y

CTS

I

11

Clear to send (active low)

UART Tx

Y

Boot loader

Boot 0

I

9

Boot 0

Power and ground

Vin

8

GND

5,7

GND

Reset

RESETN

I

10

Reset input (active low for 5 ms)

Antenna

ANT

RF

I/O

6

50

Ω Rx/Tx antenna port

GPIO - general purpose input/output

GPIO [1]

I/O

1

General purpose input/output

SPI MISO

Y

Input pull-down

GPIO [2]

I/O

2

General purpose input/output

SPI MOSI/I2S_SD

Y

Floating

GPIO [3]

I/O

3

General purpose input/output

SPI SCLK/ I2S_CK

Y

Input pull-down

GPIO [4]

I/O

4

General purpose input/output

SPI SS/I2S_WS

Y

Input pull-down

1.

ADC pin functions are not 5 V tolerant when used as ALT pin function. Otherwise the I/O pins are all 5 V tolerant.

2.

Please note that the usage of ALT function is dependant upon the firmware that is loaded into the module, and is beyond

the scope of this document. The AT command interface uses the main UART by default.