For boards with a standard 10-pin Serial Wire Debug (SWD) connector, or a connector that supports a standard 10-pin flat cable, it is recommended to connect to P19.
Connect the boards as shown in the following figure.
When pin 3 (SWD0_SELECT) of P19 is connected to GND through the 10-pin flat cable, the interface MCU programs or debugs the target chip on the external board instead of the onboard nRF52832 System on Chip (SoC).
Pin number | Signal | Description |
---|---|---|
1 | SWD0_VTG | Optional voltage supply to the external target |
2 | SWD0_SWDIO | SWD Data Input/Output |
3 | SWD0_SELECT | Debug out select signal, connect to ground on external board |
4 | SWD0_SWDCLK | Serial Wire Clock line |
5 | GND | Ground |
6 | SWD0_SW0 | The Serial Wire Output (SWO) line is not used 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 |