Pin 31

JeppeMariagerLam · Jul 27, 2023

Hi Jared (and others).

I want to use pin 31 for something, but VScode is telling me that it’s already being used by nrf-ps-en as defined in teh commons dts file. However, when reading the schemantics i dont think this is true anymore? However, during boot i do see “regulator_fixed: nrf-ps-en sync: 0”

Is there a risk with using this pin, and do I need to override the overlay file or anything like that to do it? In general, It would be nice to have a proper pin out diagram somewhere, since it can be a bit hard to understand what’s being used where Apologies if it already exists somewhere that I havent found.

jaredwolff · Jul 27, 2023

@JeppeMariagerLam I think the device tree still uses the ps-en for v5. You can remove it using an entry in an overlay:

/ {
    /delete-node/ nrf-ps-en;
};

For V4 boards, you’d have to modify JMP2 so the power supply doesn’t use P0.31 and then apply the same changes in your overlay.