How to eliminate VL bit set when the undervoltage condition occurs

[angusshi]

We use supercapacitor for PCF8563 VDD supply,  but frequently encountered undervoltage condition and the VL bit in the VL_seconds register was set. How to eliminate VL bit set?

[TomasVaverka]

Hi Angus,

I would recommend taking a closer look at Chapter 5 of the UM10301 which provides a detailed information about the VL bit.

Best regards,

Tomas