Hi,
I do one experiment on Jetson Orin Nano for RTC , seem like when I supply external power supply 2.5V direct to the PMIC_BBAT pin and set the RTC . After plug/unplug the system like the RTC still working .
However, when I leave it 24hours ( 1 days ), the RTC time is back to the 1970 after plug back the system.
based on datasheet of Jetson Orin Nano, the input PMIC BBAT will support 1.8V for minimum right ? . But for my case 2.5V is already not support , can I know any setting that needed ?
Are you saying that if you just power off the board for a while and then reboot, then RTC time is still correct but if you leave the board for long enough, then it will go back to 1970-01-01?
What do you mean “plug/unplug the sytem”? Have you try to plug out main power supply and after a day plug in and power on system to check the RTC time?
There is no update from you for a period, assuming this is not an issue anymore.
Hence, we are closing this topic. If need further support, please open a new one.
Thanks
Is this still an issue to support? Any result can be shared?