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Anyway of keeping the RTC block in nRF51822 going while device is in Reset, has crashed or powered off?

Hi, Is there anyway to keep the RTC going while in reset, device sw has crasched or in powered off mode or would I need an external RTC for this?

Is there any possibility of adding a backup capacitor to keep the internal RTC block alive?

Anyway of retaing the information in RAM during reset, I know it may sound a bit stupid but if the device has crashed you may want to be able to write the last valid data to flash when device has been reset.? or for debug purposes..

BR, Håkan