Pin planner inconsistency to datasheet

[Adam Broders]

Hello,

During design and schematic entry I used the online datasheet to select GPIO capability. I was advised that I should try out the pin planner to confirm that pin choices are acceptable.

I noticed that one of my PWM outputs, planned on Port 3, was not selectable in the planner. Note the scroll bar at the bottom of the selection window.

When referencing the datasheet I see that I am supposed to be able to use port P1 or P3.

I wanted to confirm if P3 can in fact operate the PWM as these two pieces of documentation are inconsistent.

I am seeing the same issue on GPIOTE20 and would like confirmation there as well.

Was also surprised to find that the comparators are not listed in the pin planner (LPCOMP or COMP).

Thanks for any insights!

[Adam Broders]

One of our FW engineers confirmed that at least basic functionality is working for PWM on pin P3.04 on some previous tests they had run.

Would still like to confirm if this is a documentation mistake or if there is a reason it's not included in the pin planner, such as perhaps a known issue with port 3 that we haven't discovered yet. Similarly would be good to know if comparators aren't included because of a known issue.

[tesc]

Hi,

Please note that while made by a Nordic employee, the pin planner (https://pinplanner.app/) is not an official Nordic application. There is also a disclamer about this at the bottom of the pin planner page.

If there are any discrepancies between the pin planner and official documentation, the official documentation is to be trusted. In this case, the datasheet states that GPIO port P3 can be used for PWM, for all three PWM instances.

I have notified Helmut Lord (who made the pin planner tool) about the issue, so that he can fix it. Thank you for the report!

Regards,
Terje

[Adam Broders]

Sounds good, thank you for the clarification!

Please let Helmut Lord know the planner was appreciated! It did confirm a lot of functionality and for the most part confirmed my pin selections are likely to work for the intended purpose!

[tesc]

Hi,

The tool is now updated with P3 for the PWM for nRF54LM20A. Thanks again for the report!

Regards,
Terje

[Adam Broders]

While you're already relaying information to Helmut, perhaps he can also look at GPIOTE as well? I believe this one is also supposed to support port 3, however we have not tested it on our side.

It would also be great if the comparators (LPCOMP and COMP) were added. I've set them up as GPIO's just to make sure I claim them, but it doesn't properly check usage of resources.