nRF52840 DK

Blecon Modem for Prototyping

The nRF52840 DK is the reference development kit for the nRF52840.

nRF52840 DK

Pinout

The nRF52840 DK exposes the Blecon modem serialisation interface over USB and a physical UART port as below.

nRF52840 DK pinout

Pin Label	Name	Function
GND	GND	Ground
5V	5V	5V Power input
P1.01 (D0)	TX	UART TX
P1.02	RX	UART RX
P1.03	RTS	UART Ready to Send
P1.04	CTS	UART Clear to Send

When using the nRF52840 DK as an external modem with a separate board, it is recommended to power it from an external 5V source using the 5V pin, and move SW6 to 'nRF only'.