To enable the external flash DFU, you need an additional flash memory shield.
The nRF5340 Audio DK application uses the MX25R6435F as the SPI NOR Flash. See the following table for the pin definitions.
DK pin | SPI NOR Flash pin | Arduino pin |
---|---|---|
P0.08 | SCK | D13 |
P0.09 | MOSI | D11 |
P0.10 | MISO | D12 |
P1.10 | CS | D8 |