How to test the power consumption of "System ON IDLE with GRTC (XOSC) and 256 KB RAM"

[666]

HI ALL,

   I used a system off demo and added the following content.

The power consumption tested was around 1uA, which should be normal according to the errata. Then, I wanted to test the idle state. Based on the above, I turned off the following content and tested that the power consumption was around 6uA.

This doesn't seem to match the specification book.

Is there any other way to test the power consumption of "System ON IDLE with GRTC (XOSC) and 256 KB RAM"？

note:v2.8.0,NRF54L15,QFAABB

[Sigurd Hellesvik]

Hi,

Can you try to measure the same for the blinky sample and let us know what current draw that has (when the LED is off in the blink cycle)?

Regards,
Sigurd Hellesvik

[666]

[Hieu]

Hi 666,

My apology. The blinky sample was my idea. I thought wrongly that since it doesn't enable UART, it won't have UART and can show the performance clearly. I was wrong. UART is enabled by default, and you need to disable it.

So, if you rebuilt the sample with CONFIG_SERIAL=n, you will see better number.

The reason I recommended blinky is to also point out that the measurement will also shows current drawn by the LED circuit.

If you want to observe just the nRF54L15 in System ON Idle, you can also use hello_world, with CONFIG_SERIAL=n.

Hieu

[666]

Hi,

This still has 6uA, which does not match the 3uA specified in the specifications.