时钟芯片DS12c887
Drop-inreplacementforIBMATcomputerclock/calendarPincompatiblewiththeMC146818BandDS1287Totallynonvolatilewithover10yearsofoperationintheabsenceofpowerSelf-containedsubsystemincludeslithium,quartz,andsupportcircuitry.Countsseconds,minutes,hours,days,dayoftheweek,date,month,andyear
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