Pin #

Name

Function

Mode “000”

Mode “001”

Mode “100”

Mode “010”

1

ADC2

ADC input 2

2

ADC1

ADC input 1

3

DIO4

GPIO4

UART_RXD

I2C2_CLK

PWM0

4

DIO5

GPIO5

UART_TXD

I2C2_DAT

PWM1

5

VIN

Power Supply

6

ANATEST0/DIO14

GPIO14

I2C1_CLK

SPI_CLK

ADC_DAT

7

DIO7/BOOT (1)

GPIO7

UART_CTS

I2C2_DAT

PDM_CLK

8

GND

Ground

9

DIO6

GPIO6

UART_RTS

I2C2_CLK

PDM_DAT

10

DIO8

GPIO8

UART_TXD

SPI_CLK

PDM_DAT

11

DIO11

GPIO11

UART-RXD

SPI_CS1

12

DIO9

GPIO9

SWCLK

SPI_IN(2)

13

DIO10

GPIO10

SWDIO

SPI_out(3)

14

ANATEST1

Anatest1

15

DIO0

GPIO0

UART_CTS

SPI_CLK

16

DIO2

GPIO2

PWM0

SPI_OUT

PDM_CLK

17

DIO3

GPIO3

PWM1

SPI_IN

ADC_CLK

18

DIO1

GPIO1

UART_RTS

SPI_CS1

PDM_DAT

19

RESETN

Reset

20

DIO12

GPIO12 (4)

I2C1_CLK

21(5)

GND

Ground

22(5)

N.C.

Leave unconnected

23(5)

N.C.

Leave unconnected

1. The pin DIO7/BOOT is monitored by bootloader after power-up or hardware reset and it should be low to prevent unwanted

bootloader activation.

2. The function SPI_IN indicates that the pin is always an input when configured for SPI. Thus in case of SPI master role, it

acts as MISO pin. In case of SPI slave role, this pin act as MOSI

3. The function SPI_OUT indicates that the pin is always an output when configured for SPI. Thus in case of SPI master role, it

acts as MOSI pin. In case of SPI slave role, this pin act as MISO.

5. BLUENRG-M2SA only.

BlueNRG-M2

Pin assignment

DS13053 - Rev 2

page 12/30