RE: Programming of external QSPI flash on nRF54L15

Håkon Alseth — Thu, 12 Jun 2025 10:43:52 GMT

Hi,

"nrfutil device" is able to interface a external flash device connected via a (supported) nRF device:

https://docs.nordicsemi.com/bundle/nrfutil/page/nrfutil-device/guides/programming_external_memory.html#programming-external-memory-command

Initial read from flash IC:

nrfutil device --x-ext-mem-config-file nrf54l15_ext_mem.json read --address 0x10000000
1057706745
0x10000000: FFFFFFFF                              |....|

Writing "0xDEADBEEF" to the first address in the external flash and reading it back:

nrfutil device --x-ext-mem-config-file nrf54l15_ext_mem.json write --address 0x10000000 --value 0xDEADBEEF
✔️ Data written to 1057706745

nrfutil device --x-ext-mem-config-file nrf54l15_ext_mem.json read --address 0x10000000
1057706745
0x10000000: DEADBEEF                              |....|

I used the configuration as shown in the docs: https://docs.nordicsemi.com/bundle/nrfutil/page/nrfutil-device/guides/programming_external_memory.html#example-for-spi-on-nrf54l15

Kind regards,

Håkon