CC1352P: Wakeup from Shutdown after time

Hi,

I'm using the SimpleLink SDK 6.10.0.29 with the Simple Central Example on a custom Board.

I implemented a real time clock with time and date which will be stored every minute with a timer in the NVS.

When the external power is disconnected, the device should run with an external capacitor to update the realtime clock.
To minimize the current consumption, I would like to use the shutdown mode, when the power is disconnected.
When power is disconnected, the device should go to shutdown mode. Then, the device should wakeup every minute to update the real time clock and go back to shutdown mode.
When external power is available, the device should also wakeup from shutdown.

Here I use the Power_Shutdown() which have a parameter shutdownTime.
I tried to use the parameter, but the device doesn't wakeup.

Is there another possibility to wake up the device from shutdown mode after a period time?

Regards

Thomas