Any available Timer running in System OFF mode

Question

Hello, 
 
 I want to check how much time device is in Deep sleep. For this, is there any timer running in System OFF mode. 
 
 Thanks & Regards 
 Vishnu Beema

cbd · Accepted Answer

I don't think so. 
 The Timers use the external clock crystal and so that has to remain powered for it to function. 
 You could try the RTC as that uses the Low Frequency Clock and crystal, using less power, but again in system OFF mode it is disabled. It has a lower resolution than the Timers, so you have to handle that and overruns.

Stian Røed Hafskjold · Answer

No timers are running in system OFF mode. Everything is powered down and the chip can only be woken up by an external signal: 
 
 The DETECT signal, optionally generated by the GPIO peripheral 
 The ANADETECT signal, optionally generated by the LPCOMP module 
 The SENSE signal, optionally generated by the NFC module to “wake-on-field” 
 A reset 
 
 https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52832.ps.v1.1/power.html?cp=3_1_0_17_1#unique_1707892264

Any available Timer running in System OFF mode

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