nRF7002 DK v1.0.0

Programming an external board

If your custom board has a 10-pin Arm® Cortex® Debug Connector, connection to P19 is recommended.

Connect the boards as shown in the following figure.

Figure 1. Connecting an external board to P19
Connecting a custom board to P19
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 1.8V when the DK is powered through the USB connector.

When the interface MCU detects that the ground pin 3 (GND) of P19 is pulled low, it programs or debugs the target chip on the external board instead of the onboard nRF5340 System on Chip (SoC).

If it is inconvenient to have a separate power supply on the external board, the nRF7002 DK can supply power through the Debug out connector P19. To enable this, short solder bridge SB47.

To avoid damaging your board, when SB47 is shorted, do not connect a separate power supply to the external board.
The following image shows P19 pinout schematic with a description table.
Figure 2. Debug output connector P19
Debug output connector P19 on nRF7002 DK
Table 1. Pinout of connector P19 for programming external targets
Pin number Signal Description
1 SWD0_VTG Voltage supply from the external target
2 SWD0_SWDIO Serial Wire Debug (SWD) Data Input/Output
3 SWD0_SELECT Ground on target board
4 SWD0_SWDCLK Serial Wire Clock line
5 GND Ground
6 SWD0_SW0 Serial Wire Output (SWO) line is not needed for programming and debugging over SWD
7 N.C. Not used
8 N.C. Not used
9 N.C. Not used
10 SWD0_RESET Reset line