nRF54L15-DK Power measurement with an ammeter.

[br_adams_01]

Hello.

I am reading up on documentation regarding measuring current on the nRF54L15-DK with an ammeter. I do notice that when we set up the board, we need to use the 2x5 SWD header to toggle an analog switch to disconnect the debugger from the nRF54L5. We know what connector we need, but do we need any special dongle/software to accomplish this step? Is there a simpler way to measure the current at P6?

Thanks!

[Hung Bui]

Hi Brandon, 
Could you elaborate more on this "we need to use the 2x5 SWD header to toggle an analog switch to disconnect the debugger from the nRF54L5." ? 

I'm not aware of that requirement. What happens when you just measure the current consumption on P6 by removing the jumper and connect the ammeter there ? 

[br_adams_01]

Hung,

We do get current when we measure on P6, but it was more current than we were expecting from an idle current standpoint. At first, we thought it may have been because the debugger itself was the culprit of the current draw. However, 95% of that current draw appeared to be because peripheral node uart20 was enabled for logging. Turning this off fixed the current draw and is more in line with what the idle current should be based on the Online PPK. We just want to make sure what we are measuring on P6 is actually accurate and we do not need to break the connection between the debugger and the 54L15 via P15.