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PCF8523T register retention during battery switch over

Question asked by DAVID HIRST on Aug 14, 2019
Latest reply on Aug 19, 2019 by Lisette Paulina Lozano Gomez

I am having a problem with the PCF8523T RTC chip, I occasionally lose time, and when this happens the control registers are back to there default states. Can some one tell me if the 3 control registers settings are retained during battery switch over, or are they returned to default and need to be written again?