RE: nrf9160 DFU using external flash

motters — Tue, 09 Sep 2025 20:29:32 GMT

Hi Juha,

Thanks for the reply and info.

We have sensors attached via SPI and had assumed QSPI was used for external flash, which turns out not to be the case.

For anyone else who runs into this issue: the nRF9160-DK board does not use QSPI for external flash, but instead uses generic SPI:
https://docs.nordicsemi.com/bundle/ug_nrf9160_dk/page/UG/nrf91_DK/hw_description/external_memory.html

So as Juha said, when following this guide, in step 1, choose SPI rather than QSPI for nrf9160-dk dev board.
https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-9-bootloaders-and-dfu-fota/topic/exercise-3-dfu-with-external-flash/

Cheers,

Sam

RE: nrf9160 DFU using external flash

Juha Y — Tue, 09 Sep 2025 11:10:18 GMT

Hi,

Is there a specific reason why both CONFIG_SPI=y and CONFIG_NORDIC_QSPI_NOR=y are enabled?

I noticed that I can reproduce this error when SPI isn't enabled in the MCUBOOT configuration file (sysbuild/mcuboot.conf). For reference, please see Exercise 3, step 1.2.

Best Regards,

Juha