低功耗的实时时钟

ThisapplicationnoteusestheTimer1module,froma

mid-rangePIC16CXXXmicrocontroller,tocontrola

low-powerreal-timeclock.Timer1waschosenbecause

ithasitsowncrystalwhichallowsthemoduletooperate

duringsleep.Thetwoeventsthatwillwakethedevice

fromsleep(forthisapplication)areakeypressanda

Timer1overflow.MLow-PowerReal-TimeClockAN582theselectedunitsvaluesaredisplayed.Uponkeyrelease,Author:MarkPalmertheTimercountsoutonesecondandbeginsashingtheMicrochipTechnologyInc.selectedunits.TheCLR_MINKey(S3)clearstheminutesandseconds.CLR_MINisusefulforexactlysettingthetimeINTRODUCTIONtothe“topofthehour”asannouncedinradiobroadcast