Hi,
I've been using stand-alone RTCs that clearly indicate through a specific bit whether the date is correct or may have been corrupted by undervoltage.
I cannot find any clear indication of a similar feature for the RTC integrated in the STM32F446 (using LSE), so I have 2 hypotheses:
- The tamper functionality is supposed to be used for that purpose, but I don't really understand how;
- In the event of a Vbat low-power, the RTC registers are reset and there is no possibility of an inbetween situation where the registers were not reset but the low-power situation corrupted the time.
I guess that I can't the first one to want to verify that the RTC date is correct, so does anyone know how to do that?
Thanks,
Étienne.
