8098单片机与led译码驱动器mc14499的接口设计

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1、8098单片机与LED译码驱动器MC14499的接口设计Modernelectronictechnology,1994No.4(No.71)8098microcomputerandLEDdecoderMCI4499interfacedesignXuguohualiyi-bin(jinanbranchofshandonginstituteofmining,250():pleaseInthispaper,thetechnologyofhardwareandsoftwareinterfacedesignofthelc399-1499andLEDdecode

2、rMCI1499isdescribedindetailinthispaper・AnoverviewoftheThe3098singlechipisthelatestinaseriesof96MCSAnorchidmicrocomputer・Itisgoodathighspeedcontrol,andithas16microsThecontrollerhaspowerfulcomputingpowerandhas8microcontrollerinterfacesSimpleadvantsges・Intermsofperformancepricethe

3、ory,8098chipsarenumerousThemicrocontrollerisoneofthebestintheworldIntheapplicationofmicrocomputerapplicationsinChina,anotherstudywasinitiatedLearning,masteringandapplyingthe8098singlechip.Thereareserialcommunicationportsinping098・TherearefourkindsWayofwork,inwhichthe0issynchron

4、ousandcalledshiftTheregisterworksinthismanner・The8098singlechipisRXDThepinsaresentasaserialdatatransmissionfactory,usingTXDtoleadtheoutputEightsimultaneousshiftpulses・Whetherit'ssending8bitsofdataorpickingitupEightbitsofdata・Allaretheleastvalidbitsinthefront・Figure1showsthelist

5、ofMouthway.Thetimingwaveform・TXO―RXD(0DT〃RXD(IN)Figure1method0serialdayssequencediagramYouneedtoberemindedofthe・8Thebaudrategeneratorisusedexclusivelyforserialdays,sowhenusersusestringsAtthetimeoftheline,thetimerfunctionisnotaffected・ThispointwithMCSTheseries51isdifferent・MCIxi

6、n4)9isakindofproductionbyM()T()ROIAThenewserialBCDcodeinput-theCMOSintegratedblockofthedecimalcodeoutputisdirectlydrivenandcontrolledbyMC14499FourLED8-segmentdisplays,whicharedisplayedindynamicsweepTrace・Sothepowerconsumptionislower・IntheSCMsystemMCIbitJ99hasfewerinputlines・Asi

7、nglechiphasmorecontrolThecharacteristicsoftheapplicationarewidelyused・ThemaincontrolofMC,499,isshowninfigure2Signalsare:A~9.DD:sevenblocksandtheoutputofthedecimalpoint;Ia:characterselectionoutput;OSC:theexternalcapacitanceoftheoscillator.Theexternalcapacitancemakesthefilmvibrat

8、eTheoscillatorgenerates200〜aSOOHzscanningsignalincaseo