An on-board Maxim Integrated DS3232 device provides a very accurate, temperature-compensated real-time clock (RTC) resource with:
* Temperature-compensated crystal oscillator
* I²C Interface
Backup power is provided through the RTC_VBAT (J2.113) signal. If not used, RTC_VBAT must be externally connected to GND. For a detailed description of RTC characteristics, please refer to the DS3232 datasheet.