nRF9160 DK v0.8.5

Debug output

The nRF9160 DK (Development Kit) board supports programming and debugging external boards with Nordic System on Chip (SoC)s and System in Package (SiP)s. To debug an external board with SEGGER J-Link OB IF, connect to the Debug out connector P22 to your target board with a 10-pin flat cable.

Figure 1. Debug output connector
Debug output connector on the nRF9160 DK board

When the external board is powered, the interface MCU will detect the supply voltage of the board and program/debug the target chip on the external board instead of the onboard nRF9160 and/or nRF52840.

Note: The voltage supported by external debugging/programming is the VDD voltage. This voltage can be selected to 1.8 V or 3 V using slide switch SW11. For optimal performance of the nRF9160 radio, it is recommended that only 1.8 V is used. Make sure the voltage level of the external board matches the VDD of the nRF9160 DK.

P15 can also be used as a debug out connector to program shield-mounted targets. For both P22 and P15, the interface MCU will detect the supply voltage on the mounted shield and program/debug the target.

If the interface MCU detects target power on both P22 and P15, it will program/debug the target connected to P22 by default.

If it is inconvenient to have a separate power supply on the external board, the nRF9160 DK can supply power through the Debug out connector P22. To enable this, short solder bridge SB43.