ftrtc010 real time clock - Faraday Technology Corporation

FTRTC010REAL TIME CLOCKVersion 1.4 | December 2006Functional BlocksPCLK DomainCLK1HZ DomainPCLKPRSTnSync BlockRTC CounterCLK1HZRTCRSTnpselpenablepwritepaddrpwdataprdataAPBInterfaceRTC AlarmRegistersRTC ControlRegistersRTC RecoredRegisterRTC CompareLogicRTC Auto AlarmLogicrtc_alarmrtc_secrtc_minrtc_hourrtc_dayBlock DescriptionsAPB InterfaceThe APB interface accepts standard APB bus signals. It services read / write requirements from the APB bus. When thepsel is active, the APB interface decodes the paddr to select one register. The pwrite signal indicates read or writeoperation. If the pwrite signal indicates write, the pwdata will be written to the selected register. If the pwrite signalindicates read, then the selected register will be read out to prdata.RTC Alarm RegistersThe RTC alarm registers include AlarmSecond, AlarmMinute and AlarmHour registers. The legal range for theAlarmSecond and AlarmMinute registers is 0 ~ 59, and the legal range for the AlarmHour register is 0 ~ 23. If any oneof the AlarmSecond, AlarmMinute and AlarmHour values exceeds the legal range, the rtc_alarm interrupt will never betriggered.