Bring external Memory MX25R64/MX25R32 into deep sleep on nRF54L15

[SJahnke]

Hello,

already found a description in the Tech Docs, how to bring the external memory into deep sleep on QSPI interface: https://docs.nordicsemi.com/bundle/ncs-latest/page/nrf/test_and_optimize/optimizing/power_general.html#put_the_external_flash_into_sleep_mode_in_inactivity_periods

But is this also possible for external memory MX25R64/MX25R32 on nRF54L15.

What needs to be done to bring this one on SPI Interface into deep sleep? Is there already a description how to do this on nRF54L15?

Thanks a lot

[Simonr]

Hi Steffen

Unfortunately I don't have a good idea on what these spikes are, but it seems like maybe the external flash is refreshing pretty consistenly, and maybe the DPM duration isn't set up to match the external flash specification. This needs to be configured so you can get info from the STATUS register and timing of the READY event correct. Unfortunately the datasheet doesn't really cover QSPI specific registers yet since the software emulated peripheral is still in development, so documentation here is a bit scarce.

Best regards,

Simon