we are using PCF85363A chip to do time recording and data storage in its RAM. A capacitor is used as battery to keep the data for at least 7 days. Occasionally it is observed that, all data are lost if our target PCB is reset. During the reset the VDD 3.3 V is actually still powered. I would like to ask, in which condition all data could be reset on PCF85363A?
Thank you for any help.