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* '''RTC Hardware clock''': hardware clock is controlled by PMIC using its internal RTC peripheral. RTC PMIC affords two behaviours:
** '''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 PMIC RTC peripheral 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(at least 2 weeks into IGEPv2).
== Simplified RTC diagram ==
