nrf5340 Hardware boot problems

[cweib]

Regarding the design issues with the nRF5340, I have adopted the nrf5340_qkaa_config3 design scheme from the hardware design package. However, after testing, I found that while it allows programming when I supply 3.3V to the VDD_nRF network, there is no response after the programming is completed. I would like to ask if there is a problem with the following schematic.

[cweib]

The firmware has been tested on the 5340DK development board and runs normally, so the firmware should not be the issue.

[helsing]

Hello cweib,

Is the optional 32kHz crystal mounted? If not you would need to enable the internal oscillator:

CONFIG_CLOCK_CONTROL_NRF_K32SRC_XTAL=n
CONFIG_CLOCK_CONTROL_NRF_K32SRC_RC=y

Which board are you building for? Enable the DCDC:

CONFIG_BOARD_ENABLE_DCDC_APP=y
CONFIG_BOARD_ENABLE_DCDC_NET=y
CONFIG_BOARD_ENABLE_DCDC_HV=y

If the project has a bootlader, add the kconfigs to the bootloader as well.

Have you attempted to use the debugger to step through the code, in order to verify if the code is executing?