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nRF51822 POFCON setting at VDD 2.1V

Leo

Hello,

I wonder how power failure comparator works at VDD 2.1V. If VDD goes down to 2.1V, and I set POFCON enabled at 2.1V threshold, then does POFWARN work? How 2.1V threshold is produced by VBR?

Thanks..

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    POFWARN event for Power failure warning will be triggered on any voltage below 2.1V is detected after POFCON enabled. You can also disable softdevice and check for this warning once POFCON is enable and threshold is set. if (NRF_POWER->EVENTS_POFWARN) condition can be helpful to check for this event. Clearing this event / interrupt might help to see this triggered again from voltage going lower then threshold in next power cycle if any.

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    POFWARN event for Power failure warning will be triggered on any voltage below 2.1V is detected after POFCON enabled. You can also disable softdevice and check for this warning once POFCON is enable and threshold is set. if (NRF_POWER->EVENTS_POFWARN) condition can be helpful to check for this event. Clearing this event / interrupt might help to see this triggered again from voltage going lower then threshold in next power cycle if any.

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