nRF52832 v3.x.x

Debug out for programming external boards

The nRF52 DK supports programming and debugging external boards with an nRF51, nRF52, and nRF53 Series System on Chip (SoC), or the nRF91 Series System in Package (SiP).

The interface MCU on the nRF52 DK runs SEGGER J-Link Onboard (OB) interface firmware. It is used to program and debug the application firmware of the nRF52832 SoC, by default.

To program/debug an external board instead, connect to the Debug out connector (P19) using a 10-pin cable or use P20 for custom connection.

Note: It is recommended to power the external board separately from the DK. The voltage on the external board must match that of the DK. When the DK is powered through the USB connector, the voltage is 3V.
Figure 1. Debug output connectors
Debug output connectors P19 and P20 on nRF52 DK