RE: Optimizing Flash Storage Write Speed on nRF54L15 DK

Elfving — Thu, 08 Jan 2026 10:25:02 GMT

Hi Lea,

[quote user=""]At the moment, I am using SPIM with jedec,spi-nor. From my online research, it seems that for higher write speeds, switching to QSPI with the Nordic driver (nordic,qspi-nor) is recommended. Is this correct? How could this be implemented? And is it even possible on the nRF54L15 DK?
[/quote]

First of all, I see you've set spi-max-frequency = <8000000> there. It can go higher with a "high speed instance"

Yes, it's true that QSPI can improve the speed. Though since you say that the speed you are currently getting is less than expected, what are you currently getting and what did you expect? If it is surprisingly slow it might be an idea to take a logic trace of the communication here to figure out if there is something strange going on.

Using QSPI is an option. Though one thing about the nRF54L15 is that it does not have a dedicated QSPI peripheral, but what we call a softperipheral. For more, you can for instance see here. The sQSPI supports clock frequencies up to 64MHz.

Regards,

Elfving