DS1306 Serial Alarm Real Time Clock (RTC)

DS1306SerialAlarmRealTimeClock(RTC)，时钟芯片的说明文档资料Realtimeclockcountsseconds,minutes,hours,dateofthemonth,month,dayoftheweek,andyearwithleapyearcompensationvalidupto210096-bytenonvolatileRAMfordatastorageTwoTimeofDayAlarms-programmableoncombinationofseconds,minutes,hours,anddayo