NRF54L15 SPI NOR Flash

RE: NRF54L15 SPI NOR Flash

Doug K — Fri, 12 Dec 2025 15:35:00 GMT

This is good to know! Hopefully others find this answer.

RE: NRF54L15 SPI NOR Flash

JordanYates — Fri, 12 Dec 2025 00:53:50 GMT

For anyone else coming across this question, this is not entirely true.

You can instead use the Zephyr bitbanging SPI driver to continue development until the hardware revision arrives: docs.zephyrproject.org/.../zephyr,spi-bitbang.html

RE: NRF54L15 SPI NOR Flash

Sigurd — Tue, 22 Apr 2025 12:06:43 GMT

Hi!

The pin you are using for SPI CLK , P1.02, is not a clock-pin, so you need to wait with any SPI related development until your next board revision.

https://docs.nordicsemi.com/bundle/ps_nrf54L15/page/chapters/pin.html

RE: NRF54L15 SPI NOR Flash

Doug K — Thu, 17 Apr 2025 20:17:59 GMT

Thanks for the reply.

I was not aware that only certain pins can be used for SPI. Could I slow down the clock speed to be able to continue development or am I SOL for this custom board spin? I'd like to continue development if possible and correct it on the next revision.

Here is the prj.conf file from the sample:

CONFIG_STDOUT_CONSOLE=y
CONFIG_FLASH=y
CONFIG_SPI=y

RE: NRF54L15 SPI NOR Flash

matt.heins — Thu, 17 Apr 2025 19:56:58 GMT

There are specific pins for high speed lines on the nRF54L15. My colleague has made this online tool to help for the moment in pin planning.

nRF54L Pin Planner

The pins you have selected are not the right ones for SPI00 which can only be on Port 2. There are specific pins there for SPI00 which are shown in the tool.

It's also good to show us your prj.conf file as well when describing configuration issues.