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4 years, 2 months ago.
Is it possible stop the RTC time registers being reset if BU power is supplied or on a nRST
I have had a good look at the RTC code, but can't see were the RTC CTRL register is reset on a power cycle. Does this require the BURTC for this work?
Question relating to:
4 years, 1 month ago.
You are correct, it is only the BURTC (and its 512 bytes of retention RAM) that don't lose state when in Backup Power mode. Additionally, you will need to configure the MCU to go to BU power on loss of regular VDD, since that is switched off by default. Please see chapter 10.3.4 (Backup Power Domain) in the EFM32 Giant Gecko reference manual for more info on how to do that.