The nRF52840_Developer_Manual_QM33SDK-1.02 in section 4.4.2 provides instructions for flashing nRF52840 firmware (QM33 UCI/CLI HEX file) via the nRF5340 onboard JLink debugger. My understanding of this DFU process is shown in the following diagram.
This works for the DK but if designing a tag device with only the nRF52840 MCU what would be the flashing process? Assume it would be similar to flashing the nRF52840 dongle.
[Flash instructions for nRF52840 Dongle - Nordic Developer Academy]
(Flash instructions for nRF52840 Dongle - Nordic Developer Academy)
These instructions suggest that would need to merge the nRF5 bootloader and QM33 UCI/CLI HEX file and combine into a single SPI flash mapping.
So, is there documentation or a tutorial that details how standalone nRF52840 DFU would work?
Second, would it be possible to perform non-Jlink flashing of the nRF52840 on the QM33120WDK1?