RTC

The RTC of JH-7110 provides the following features.

• Less DFF/Power
• Provide calendar register with year, month, day, hour, minute, second
• Support leap year judgment
• The range is 2001/01/01/00/00/00 to 2099/12/31/23/59/59
• Support DayClk/HourClk/MinClk, in BCD code
• Implement timer interrupt function through register
• The clock frequency of the input crystal is 32768 Hz
• There are 32 reference calibration clocks chosen by software with reference clock coming from GPIO
• Hardware calibration interval is 1D/1H only works when reference calibration clock connected
• Support software calibration