The nRF54L15 DK supports the programming and debugging of external boards with the nRF51 Series, nRF52 Series, nRF53 Series, and nRF54 Series SoCs and nRF91 Series SiPs.
To program or debug an external board, connect it to the P19 Debug out header with a 10-pin cable. The external board can be powered by supplying power to the P5 pin 3 labeled VDD SWD0.
Note: The programming cable used to connect the
external board must be no longer than 10 cm. To prevent damaging the nRF54L15 DK or the external board, ensure that the external board is powered from
only one source: either P5 or an external power source. The VDD of the external
board voltage must be within the range of 1.8 V and 3.6 V.
Figure 1. Debug output header
The following table describes the pinout of the P19 header.
| Pin number | Signal | Description |
|---|---|---|
| 1 | SWD0_VTG | I/O voltage reference input for SWD0 signals or power supply to external board. |
| 2 | SWD0_SWDIO | SWD data I/O. |
| 3 | SWD0_SELECT | Debug out select signal. Connect to ground on the external board. |
| 4 | SWD0_SWDCLK | Serial Wire Clock line. |
| 5 | GND | Ground. |
| 6 | SWD0_SW0 | 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. |
Figure 2. Connecting an external board to P19
