Cmsemicon BAT32G1 9 Series, Руководство пользователя

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BAT32G1x9 user manual | Chapter 11 Real-time clock
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Chapter 11 Real-time clock
11.1 The function of a real-time clock
The real-time clock has the following functions.
•
Holds a counter of years, months, days, hours, minutes, and seconds that can be counted up to 99
years.
•
Fixed cycle interrupt function (period: 0.5 seconds, 1 second, 1 minute, 1 hour, 1 day, 1 month).
•
Alarm interrupt function (alarm clock: week, hour, minute).
•
1Hz pinout function
11.2 The structure of the real-time clock
A real-time clock consists of the following hardware.
Table 11-1 Structure of real-time clocks
Item structure
counter Internal counter (16 bits).
Control registers
Perimeter allow register 0 (PER0. bit7)
Real-time clock selection register (RTCCL).
Real-time clock control register 0 (RTCC0).
Real-time clock control register 1 (RTCC1).
Seconds Count Register (SEC).
Minute Count Register (MIN).
Hour Count Register (HOUR).
Day count register (DAY).
Week Count Register (WEEK).
Month count register (MONTH).
Year Count Register (YEAR).
Clock Error Correction Register (SUBCUD).
Alarm clock minute register (ALARMWM).
Alarm hour register (ALARMWH).
Alarm Clock Week Register (ALARMWW).
Note: The reset of the above RTC control register is controlled only by the POR reset.