NRF52832 does not start after power up.

I program my project with the debugger, and it starts working.

I remove the debugger (DK52). The project still works as expected.

I rest by connecting reset pin to GND, release it, and system starts working normally. This can be done as many times as I wish, always the same.

Now I disconnect 3.3 Vcc. Reconnect 3.3V and nothing happens. The 32Khz XTAL is oscillating, but nothing works. trying the reset pin also does not change anything.

By using 3.3V I am sure that there is no pin with higher voltage, so latch-up is not the problem.

What can it be this problem?

Any idea is welcome.

Johanan

Related