RTC peripheral and system clock

Hi,

Is there any relationship between RTC peripheral and the system clock (which from DTC it looks like attached to rtc0)?

I'm trying to use PPI to generate a radio task based on system clock compare (i.e. send packet at day:mont:year:hour:minute:second:msec:usec type of event)

The RTC in the peripheral section is too short to contain long enough time span between overflow and I can't find in the documentation a way to invoke PPI from system clock.

Is that possible at all?

Thanks,

Guy.

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