Fernando Alcaide

PCF2129T  reset time register after power up

Discussion created by Fernando Alcaide on Jan 28, 2020
Latest reply on May 29, 2020 by Alain Bonnefoy



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