,i use a nrf52840dk_nrf52840 to run once a nrf5340dk_nrf5340 board's code , I change board name from nrf5340dk_nrf5340_cpuapp to nrf52840dk_nrf52840, change xxx .overlay from app.overlay to nrf52840dk_nrf52840.overlay. this code can run in nrf5340 board ,but run in nrf52840 there is a reset problem