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** RTC battery is not used: PMIC RTC peripheral keeps hardware clock alive when OS isn't running and power source is active. If the power source fails, the RTC Hardware clock will lose its clock.
** RTC battery is used: PMIC RTC peripheral keeps hardware clock alive when OS isn't running and backup battery powers the backup state as far as the input voltage is high enough.
== Clock drifts==
IGEP Boards use as a source clock a 32.768kHz crystal. This passive component can add clock drifts due:
