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Detect that RTC on vbat is no longer valid after a power-loss

Question asked by Daniel Moberg on Jun 14, 2018
Latest reply on Jun 14, 2018 by pevy.andy



I have a STM32F769ni target, Which have a super-cap connected to vbat for keeping track of time when we get a powerloss.

How would i know (in code) that the vbat has been running low (below 1.65V in my case) and therefore the time is no longer correct when starting up again?