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1、DesignSimulationofLEDClockCircuitBasedonProteusAbstract：BasedontheProteussimulationsoftwarethecircuitsofMCVcontrollingLEDclockhavebeendesigned.Thecircuitsincludefourparts:Hardwaredesignsoftwareprogrammingsoftwaresimulati

2、onphysicaldisplay.EventuallythroughtheProteussoftwaresimulationphysicaldisplayprovethatthemethodofthecircuitdesigniscrect.ThispapersystematicallyintroducesthedesignmethodofMCVcontrollingcircuitsprovidesacompletedesignide

3、afthedesignofdisplaycircuit.Keywds：ProteusLEDclockcircuitI.INTRODUCTIONProteusisEDAsoftwaredevelopedbytheUKLabcenterCompanywhichcannotonlyrealizefundamentalcircuitsimulationbutalsosimulatedebugMCUperipheralcircuits.Witht

4、heProteuspowerfulsimulationcapabilitiesextensiveresourcelibrariesthedesignprocessofhardwarecircuitcanbeeffectivelysimplified.TheProteussimulationsoftwarecanbefirstlyusedinthedesignsimulationdebuggingofthehardwarecircuit.

5、Whentheresultsreachthedemthephysicalcircuitswouldbeenfinallysetupdebugged.Thismakessurenotonlyahigheffectivelowinvestedcircuitdesignbutalsoreducesthelosscausedbyburningofdebugginginpractice.Inadditionithasalsoprovidedane

6、ffectivedesignapproachfhardwarecircuitdesignunderscarceresourceconditionsinlabaty.II.HARDWAREDESIGN80C52isthecontrolcenterofthewholehardwarecircuit.POpinsconnectwithsixLEDnixietubesthroughtwolatches74HC573respectively.P2

7、.6P2.7inP2pinsof80C52respectivelycontrolthenixietubesegmentselectedbitedsignals.The“Key“connectswiththeP3.7pinwhichcanclearthedisplay.Sixnixietubesaredividedintothreegroupsfromlefttorightwhichpresentsrespectively:hour(Ho

8、ur_HHour_L)minute(Min_HMin_L)second(Sec_HSec_L)POpinsconnectwith74HC373throughexternalpullupresistsUsingtwolatchesismainlytosave80C52ptresourcesindertofacilitatefollowupdevelopmentofcircuitdesign.Peripheralcircuitsinclud

9、einputpowercircuitpowersupplyfiltercircuitresetcircuittheLEDindicatingcircuitsoon.Thewholehardwarecircuitshavebeendisplayedinfigure.oftimesettinghavingbeenuseddemonstratetheiradvantagesdisadvantagesindertoprovideatheetic

10、alreferencefthesoftwaredesigninfuture.KeilllVision2softwarecompilerinterfaceiscompiledsuccessfullydisplayedinFigure2(“0errs““0warnings“).Itgenerates.HEXhexadecimalfilefthenextstepofthesimulation.IV.SIMULATIONPHYSICALDISP

11、LAYUnderthecontrolofClanguagetoeachpinofMCU80C52afterthesuccessofKeil11Vision2softwarecompile.HEXhexadecimalfilegenerates.InProteus7.5simulationsoftwareaccdingtocircuitprinciplestructuredisplayedinFigure1itdrawsacomplete

12、circuit.Thendownloading.HEXfiletotheMCUobtainsthesimulationresultsasdisplayedinFigure3[41.Inthisfigure“7SEGMPX6CCBLUE“modulehasbeenedasthesixLEDnixietubesthefmertwobitsdisplay“hour“thedletwobitsdisplay“minute“thelasttwob

13、itsdisplay“second“.Whenpressingthebuttonkeythenixietubesdisplaywillbeclearedthenretiming.Changingthevalueoftimerdelayinprogramsitcanchangetheclockspeedrealizethefunctionofstopwatch.Indertofurtherverifytheaccuracyofprogra

14、mminghardwarecircuitdesignitobtainsthedisplayeffectivenessshowninFigure4throughdownloading.HEXfiletoMCU.FinallyitverifiesthecrectnessofwholecircuitdesignbyProteussimulationphysicaldisplay.Figure3.Proteussoftwaresimulatio

15、nV.CONCLUSIONThispaperhassystematicallystudiedMCUcontrollingelectronicclockcircuitfromtheperspectives:hardwarecircuitsoftwareprogrammingsoftwaresimulationphysicaldisplay.Thewholecircuitissimplefunctionexpabledisplayflexi

16、ble.Inthispaperitverifiesthecrectionofprogrammingdesigncircuitdesignthroughsoftwaresimulationphysicaldisplay.PuttingtheProteussimulationsoftwareintosimulationofMCUavoidsaseriesofprocessesinthetraditionaldirectlyapplyingh

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