Supported Development kits (DKs) with built-in external flash have a default configuration that nrfutil device loads automatically when you connect to the kit.
You do not need to pass --x-ext-mem-config-file for these kits unless you want to override the default settings, for example use SPI instead of QSPI for DKs that allow it.
The following DKs have a default configuration:
| Development kit | Board number | Default peripheral |
|---|---|---|
| nRF52840 DK | PCA10056 | QSPI |
| nRF5340 DK | PCA10095 | QSPI |
| nRF7002 DK | PCA10143 | SPIM0 |
| nRF54L15 DK | PCA10156 | SPIM00 |
| nRF54LM20 DK | PCA10184 | SPIM00 |
| nRF54H20 DK | PCA10175 | EXMIF |
The default configuration corresponds to the example configuration files shown further down on this page.