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1、TheTheElectronicElectronicCalendarCalendarBasedBasedononAT89C51AT89C51Withtheimprovementofpeopleslivingstardliferhythmacceleratethetimerequirementsofincreasinglyhighprecisiondigitaltimingconsumptiondemisincreasing.Thepro

2、ductionofelectroniccalendarhasmanykindsgeneraltostudyofmultifunctionelectroniccalendarthecalendarinadditiontotheiginaldisplaytimedateotherbasicfunctionsalsohasthealarmalarmotherfunctions.Businessproductionofelectroniccal

3、endarfromthequalitypricepracticalconsiderationsconstantlyimprovethedesignoftheelectronicperpetualcalendarmakingitmewiththemarket.Thedesignfthesoftwarehardwarewithacombinationofasetofdesign.Insoftwaredesignthehardwarepart

4、shouldhaverelevantknowledgewhichhelpstodesignadeeperunderstingcontributetosoftwaredesign.Basictounderstsomeofthemaindevicesofthebasicfunctionsrole.InadditiontousingintegratedclockchipadoptstheschemeofMCUusingAT89seriessi

5、nglechipmicrocomputermadeperpetualcalendarcircuituseacombinationofhardwaresoftwaremethodscontrolofLEDdigitaltubeoutputareusedtoshowtheyearmonthdayhoursminutessecondsthemainpointis:thehardwarecircuitissimpletheinstallatio

6、nconvenienteasytorealizethesoftwaredesignisuniquereliable.AT89C51isofferedbytheATMELasmallmicrocontroller.95yearsinChinamarket.ItsmainacteristicsistheFlashmemytechnologyreducesthemanufacturingcostofthehardwaresoftwareful

7、lycompatiblewiththeMCS51canveryquicklybytheChinesemajityofuseracceptance.ThispaperintroducesthedesignoftheelectronicperpetualcalendarbasedonAT89C51.1designdesignschemesschemesThisarticleproposedonekindbasedontheAT89C51MC

8、UcalendardesigntheprogramtoAT89C51singlechipmicrocomputerasacontrollingcecomputerapplicationsystemhashigherreliability.Thereliabilityoftheobtainedinadditiontelyonthechipitselfthehighreliabilityapplicationhavetheleastconn

9、ectionalsocanbeconvenientlymadeofsofthardwaretechnology.2extensionofthesystemsystemconfigurationistypicalspecificationeasytoscaleavarietyofapplicationsystemapplicationsystemhashighutilizationcoefficientofsofthardware.3in

10、thefmofapplicationsystemisacomputersystemaconsiderablemeasurecontrolfunctionsarerealizedbysoftwaresowithflexiblefeaturesdonothavetochangethehardwaresystemcanproperlychangesystemfunction.4havesuperiperfmancepriceratio.4ch

11、ipchipThemaincontrolchipusing51SeriesMCUclockchipusingAT89C51AmericALLAScompanyintroducedahighperfmancelowpowerconsumptionwiththeRAMrealtimeclockDS1302.UsingDS1302asthetimingchipcanachieveaccuratetiming.MeimptantlyDS1302

12、canbeinaverysmallcurrentbackuppowersupply2.5～5.5Vpowersupply2.5Vpowerconsumptionlessthan300nADS1302.Canbeprogrammedtoavarietyofgingcurrenttopowerfslowgecanguaranteethebasicpowerbackuppowersupply.DisplaydriverusingMAX7219

13、MAX7219isamicroprocessacommoncathodeeighteightLEDdigitaltubedisplaygraphbarcolumntdisplays64dotmatrixdisplayinterfacesmallserialinputoutputchip.SheetincludingBCDdecodermultiplescancontrollerwdbitdrive8x8staticRAM.Externa

14、lresistonlyneedonesetallLEDdisplayscurrentfield.MAX7219microprocessonlythreewirestoconnecteachshowhasanaddressbythedigitalmicroprocesswrite.AllowuserstochooseeachBCDdecodingnotdecoding.Userscanalsochoosetoshutdownmodethe

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