W90P710_05 Datasheet, PDF (416/526 Pages) Winbond – 16/32-bit ARM microcontroller

W90P710
Tick Time interrupt: RTC block use a counter to calibrate the tick time count value. When the value
in counter reaches zero, RTC will issue an interrupt.
RTC register property: When system power is off but RTC power is on, data stored in RTC registers
will not be lost except RTC_TSSR, RTC_RIER and RTC_RIIR. Because of difference between RTC
clock and system clock, every time user write new data to any one register, the register will be
updated until 2 RTC clock later (60us).
In addition, user must be aware that RTC block does not check whether loaded data is out of bounds.
RTC does not check rationality between RTC_DWR and RTC_CLR either.
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