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nrf52832 poweroff mode question

Hello.

I 've analyzed a couple of topics here regarding to poweroff.
But still want to clarify something.

In my project I need to keep MCU in lowest possible power mode, but with ability to wake it up after some predefined amount of time,
to switch on RF on some short period and than power down again.
I was able to set RTC proper way to count this intervals. But the problem is, that in lowest poweroff mode RTC is off.
Mode with idle power down with working RTC still uses about 600uA which is too much.

So my question is, poweroff mode can has wake up only on GPIO and no low-power timer can be used to count and wake-up?
Same is for watchdog, can't I use it in poweroff to reset MCU?

Kind regards.
Ivan.


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