nRF54L15 power consumption in sleep

[Marcel Graber]

Hi,

I've received the nRF54L15 DevKit and tested the power consumption during sleep
Testproject in GIT: https://github.com/marcel-cd/nrf54l15dk-powertest

The result was 960uA, the nRF52DK needed with the same settings 7uA. Are there any new settings or peripheral settings needed to get a proper sleep with the nRF54L?

[Simonr]

Hi Marcel and Bryn

What core are you building for here Marcel, the app core or the FLPR core? The FLPR core does not go into the idle mode by default, and this current consumption could seem like the FLPR is running. This is done by building either for the cpuapp or cpuflpr targets in VS Code. Check out the nRF54L series development guide available here for reference.

Best regards,

Simon

[Marcel Graber]

Hi Simon,

Sure, the FLPR core is running, because I wanted to test the LowPower Features and possibilities of this new RISC-V CoProcessor.

The project is setup as a multi-image build, you find two firmwares (flpr/src/main.c) (main/src/main.c) and both firmware should go to Zephyr-auto-sleep (PM_DEVICE enabled and endless loop with k_sleep)

But as this was only a test for the nRF54 and not a productive need, I will wait, till you have some sample code in NCS.

Best, Marcel