nrf52832 RTC SYSTEMOFF power comsumption

[MAIDB]

Here I am working on NRF52832 + SDK15。

I have designed two board with different 52832 package (N52832-CIAAB0 and N52832-QFAAB0), I have disabled all peripheral part and test CPU power consumption.

I used same software，but I found power consumption is different：

SYSTEMOFF mode:     23uA(N52832-CIAAB0 )   and 145uA(N52832-QFAAB0)

SLEEP           mode:     2.25mA(N52832-CIAAB0 )   and 2.17mA(N52832-QFAAB0)

I want to know if these two board's power consumption is normal.

And I have a question about RTC and systemoff mode:

       I am using RTC2, I want to know if RTC is still working in systemoff mode. And I want to know how to keep RTC time when system wake up from systemoff mode.

Thanks

Frank

[bjorn-spockeli]

Hi MAIDB, 

the numbers you've posted are very high if you're only using the RTC, you should see numbers similar to the ones listed in  Current consumption: Ultra-low power in the nRF52832 PS. 

It is not possible to keep the RTC running in System OFF mode, all peripherals except the configured wakeup sources( GPIO Sense, LPCOMP, NFC Wake-on-Field) will be active.

Best regards

Bjørn