Maxim Integrated 71M6513H Power Meter IC Family Software - Manual (Page 83)

71M651x Software User’s Guide
5.12.VALIDATING THE BATTERY
For applications that utilize the RTC it is very important to validate the battery. A brief loss of battery power when the
651X IC is powered down may result in corrupted RTC data.
After battery power is lost, the RTC will read the year 2001, the month January, and the day 1 (2001/01/01). The time
information will be 01:01:01. If the MPU firmware program detects the date 01/01/2001 upon power-up or reset, it is
safe to conclude that the RTC is corrupted, most likely due to a missing or low-voltage battery.
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