nRF51822 POFCON and comparator operation when boot at VDD 1.8V

[Leo]

Hello,

If I enable POFCON at 2.1V threshold in my S/W, build and download it in my target, and I turn on n51822 at VDD is 1.8V. That is, VDD is lower than POFCON threshold setting.

In this case, how POFCON and power-fail comparator work?
Does the output threshold of POFCON will decrease around 1.7V?
Or Are POFCON and comparator disabled?

Thanks.

[Stefan Birnir Sverrisson]

Hi Leo

I feel like I have already answered your question on this thread.

If VDD is lower than the configured voltage level of the POFCON, then the POFCON will fire one event.

If you think I have not answered your question, please clarify your question.