nRF52 secure uart bootloader does not start applicationhttps://devzone.nordicsemi.com/f/nordic-q-a/92977/nrf52-secure-uart-bootloader-does-not-start-applicationHi, Sorry to seek help again but I cant solve this issue Steps 1 - nrfjprog -f nrf52 --eraseall 2 - nrfjprog -f nrf52 --program mbr.hex --sectorerase --verify With the mbr in &quot;nRF5_SDK_17.1.0_ddde560\components\softdevice\mbr\hex\mbr_nrf52_2en-USTelligent Community 13Tue, 18 Oct 2022 14:36:27 GMTRE: nRF52 secure uart bootloader does not start applicationhttps://devzone.nordicsemi.com/thread/391244?ContentTypeID=1Tue, 18 Oct 2022 14:36:27 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5cf5c1d0-54cc-4617-b910-cacce8c163cfgat<p>Thanks for the very fast answer !</p> <p>The issue was the addresses in the linker script of my app</p><div style="clear:both;"></div>RE: nRF52 secure uart bootloader does not start applicationhttps://devzone.nordicsemi.com/thread/391237?ContentTypeID=1Tue, 18 Oct 2022 14:28:45 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fada1f21-fcd0-4344-94d8-96d672d97a38Vidar Berg<p>Hello,</p> <p>If you haven&#39;t done it already, please check if the application runs as expected if you program it directly (not DFU) along with the MBR.hex. Maybe there is an issue with the linker settings. The app must start at 0x1000 in FLASH and 0x20000008 in RAM to work with the MBR present.</p> <p>Best regards,</p> <p>Vidar</p><div style="clear:both;"></div>