Pin

Name

Description

I/O

Note

1

GPIO1

GPIO indicating BT connection status

- 1: BT connection is active

- 0: BT connection is not active

O

5 V tolerant

2

GPIO2

General purpose I/O

I/O

3

GPIO3

General purpose I/O

I/O

5 V tolerant

4

GPIO4

GPIO indicating module power status

- 1: active mode

- 0: Deep Sleep Mode

O

5

GPIO5

I2C_SDA line for MFi chip or general purpose I/O

I/O

5 V tolerant

6

GPIO6

I2C_SCL line for MFi chip or general purpose I/O

I/O

5 V tolerant

7

GND

Reference ground

NA

8

Vin

Main power supply input

NA

9

Boot 0

Boot 0 pin

I

10

RESETn

Reset input (active low for 5 ms)

I

11

CTS

Clear to send (active low)

I

5 V tolerant

12

RTS

Request to send (active low)

O

5 V tolerant

13

RXD

Receive data

I

5 V tolerant

14

TXD

Transmit data

O

5 V tolerant

15

LPO

Low power 32 KHz oscillator

I/O

See Section 6.5 External LPO input circuit

16

GPIO8

General purpose I/O

I/O

5 V tolerant

17

GPIO7

General purpose I/O

I/O

5 V tolerant

18

+1.8V OUT

+1.8 V out (max 10 mA)

NA

Note:

Some GPIOs can be configured with alternate functions. For details refer to the AT Command Data Package

user manual.

SPBT3.0DP2

Pin assignment

DS11599 - Rev 7

page 10/31