Watch dog + sd_power_system_off Is it possible?

[Mariko99]

Hello !

is possible turn off my system using sd_power_system_off  when the Watch dog is enabled?

After I called sd_power_system_off  my device is restarting and initialize everything again

details:

SDK13, nRF52

[Sigurd]

Hi,

That is not possible. Watchdog reset is not available in System OFF. All clock sources are off during system off, so the watchdog cannot run in system OFF mode.

I recommend that you read this section about System OFF mode.

[Mariko99]

so if I use System Off it disables the Watchdog ?

[Sigurd]

Yes. System OFF is the deepest power saving mode the system can enter. In this mode, the system’s core functionality is powered down and all ongoing tasks are terminated.

[Mariko99]

I was not sure if the watch dog timer keeps running when a system power off call, but if it is disable after a power off it solves my question,

Thanks Sigurd