NRF52832 does not start after power on

Dear all,

1) I flash the code through the debugger to my pcb and it is running correctly (just on/off some LEDs).

2) I remove the JTAG+SWD connector, the project still works as expected.

3) I reset it and the system starts working normally. This can be repeated again and again.

4) BUT now I disconnect 3.3 Vcc. Reconnect 3.3V and the application is failed to start. I also try the reset pin, and the application is not running.

5) I use the LDO, i have read through the answer here that by adding a line "CONFIG_BOARD_ENABLE_DCDC=n" to the "prj.conf" file.

    But the word "CONFIG_BOARD_ENABLE_DCDC" is not recognized.

I use the visual studio code as an IDE. 

SDK: nRF Connect SDK v3.0.0

Toolchain v3.0.1

 

Can anyone help about how to disable the DCDC function?

Thanks,

Regards,

Carl

What can it be this problem?

Any idea is welcome.

Johanan

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