Remove Default Pin Assignment InfoDoc 5340

[rockerderek]

How do I use GPIOs P0.25 and P0.26 for my own function? I've read that these are already assigned for the 5340, but since nRF SDK 1.7.0 they are no longer in the nrf5340_cpu_reset.c file which is great. So how do I use them now? When I search the file contents of each the files below, I can't find anything related to pin 25 or 26.

Is there an InfoDoc on Nordic's website that shares the default pin assignments for each of Nordic's boards and how to disable the default pin assignments? If not that would be pretty helpful.

[Øivind]

Hi,

P0.25 and P0.26 were UART0 pins on the deprecated nRF5340 PDK. On the normal DK (version 1.0.0 or higher) these pins should be usable as normal GPIOs.

[rockerderek]

Is there an InfoDoc on Nordic's website that shares the default pin assignments for each of Nordic's boards and how to disable the default pin assignments?

[Øivind]

These links should provide some insight:

https://infocenter.nordicsemi.com/index.jsp?topic=%2Fps_nrf5340%2Fchapters%2Fpin.html&cp=4_0_0_8_0

https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/connector_if.html

Otherwise, the board files also show the default assignment of the pins.

I'm not entirely sure what you mean by "disable the default assignments". Changing the pins in the board files will change the pin assignment. On the DK there are also solder bridges which need to be cut or soldered for some pins:

https://infocenter.nordicsemi.com/topic/ug_nrf5340_dk/UG/dk/solder_bridge.html