How to program firmware to external SPI Flash of nRF54L15

RE: How to program firmware to external SPI Flash of nRF54L15

Hieu — Tue, 28 Oct 2025 14:00:28 GMT

Thank you, Application Ninja, for the update and report. I will notify the documentation maintainer of the issue.

Please note that the --x prefix to a command or option in nRF Util denotes that it is experimental and, while rare, might change. This seems to be one of those cases. Please also keep that in mind when using experimental features in the future.

RE: How to program firmware to external SPI Flash of nRF54L15

Application Ninja — Mon, 27 Oct 2025 21:16:01 GMT

OK, the documentation needs to be cleaned up a bit...

In one section it states the command is:

nrfutil device program --x-ext-mem-config-file <path_to_config_file> --firmware <hex_file> --serial-number <serial_number> [--options]

But just a few lines below it's is corrected as:

nrfutil device --x-ext-mem-config-file ../../nrf-probe/resources/firmware_config/nrf5340dk_qspi_config.json program --firmware data_going_to_external_flash.hex --serial-number 1050065027

With the note:

The --x-ext-mem-config-file option is available from the nrfutil device command level, hence program in this example appears after the flag.

RE: How to program firmware to external SPI Flash of nRF54L15

Application Ninja — Mon, 27 Oct 2025 21:11:25 GMT

I am experiencing the same problem here, and those update commands didn't fix anything:

ninjastudio@Ninjas-Mac-Studio scan % nrfutil self-upgrade
nrfutil is already the newest version (8.1.1)
ninjastudio@Ninjas-Mac-Studio scan % nrfutil upgrade device
nrfutil-device is already the newest version (2.15.1)

RE: How to program firmware to external SPI Flash of nRF54L15

Hieu — Thu, 12 Jun 2025 20:08:16 GMT

Hi Tom.Fu,

Could you please try to update nrfutil with these commands and try again?

nrfutil self-upgrade
nrfutil upgrade device

Hieu