I am using your RTC, reference PCF2129T, in one board designed by us. I am connected VDD to 3V3 and VBAT to external battery.
After one power down of VDD and power up, I am reading the time registers and the value has been reset.
I am monitoring VBAT all time and the value is adove of 3V
Do you know what is the problem?
Could you say me one idea?
Thank you in advance