https://devzone.nordicsemi.com/f/nordic-q-a/96609/hex-file-explain-about-5340-developmentHi, A simple question about 5340 hex image needs you to clarify. I use vscode to create a example(zephyr/samples/bluetooth/peripheral_hr) with 5340 board config. Then I rebuild it and get some HEX file in build folder. As far as my understandingen-USTelligent Community 13Mon, 13 Feb 2023 10:21:15 GMThttps://devzone.nordicsemi.com/thread/409535?ContentTypeID=1Mon, 13 Feb 2023 10:21:15 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2fbe452a-a8f7-48d9-9d80-c2b0bfbdcc40runsiv<p>Hi&nbsp;</p> <p>It is a bit depended on the application you are creating. However the documentation linked below describes the different files and uses.&nbsp;</p> <p><a href="https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/working_with_nrf/nrf53/nrf5340.html#building-and-programming-a-sample">https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/nrf/working_with_nrf/nrf53/nrf5340.html#building-and-programming-a-sample</a></p> <p>But as long as the network core is a child image it should be enough to just flash the merged_domains.hex</p> <p>Regards</p> <p>Runar</p><div style="clear:both;"></div>