Hardware description
Figure 18: Debug input
4.8 Debug out for programming external boards
The nRF52 DK supports programming and debugging external boards with nRF51 Series or nRF52 Series
SoCs.
The interface MCU on the nRF52 DK runs SEGGER J-Link OB interface firmware and is used to program and
debug the 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, which is 3.0 V when the DK is powered through the USB
connector.
Figure 19: Debug output connectors
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