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1、DigitalvoltagemeterBasedonsingle-chiptechnologySinglechipisanintegratedonasinglechipacompletecomputersystem.Eventhoughmostofhisfeaturesinasmallchip,butithasaneedtocompletethemajorityofcomputercomponents:CPU,memory,internalandexternalbussystem,mostwillhavethe
2、Core.Atthesametime,suchasintegratedcommunicationinterfaces,timers,real-timeclockandotherperipheralequipment.Andnowthemostpowerfulsingle-chipmicrocomputersystemcanevenvoice,image,networking,inputandoutputcomplexsystemintegrationonasinglechip.Alsoknownassingle
3、-chipmicroprocessor,firstbecauseitwasusedinthefieldofindustrialcontrol.Onlybythesingle-chipCPUchipdevelopedfromthededicatedprocessor.ThedesignconceptisthefirstbyalargenumberofperipheralsandCPUinasinglechip,thecomputersystemsothatsmaller,moreeasilyintegratedi
4、ntothecomplexanddemandingonthevolumecontroldevices.INTELtheZ80isoneofthefirstdesigninaccordancewiththeideaoftheprocessor,Fromthenon,theMCUandthedevelopmentofadedicatedprocessorpartedways.Atpresent,single-chiptoinfiltrateallareasofourlives,whichisverydifficul
5、ttofindtheareaofalmostnotracesofsingle-chipmicrocomputer.Missilenavigationequipment,aircraftcontrolonavarietyofinstruments,computernetworkcommunicationsanddatatransmission,industrialautomation,real-timeprocesscontrolanddataprocessing,arewidelyusedinavarietyo
6、fsmartICcard,limousineciviliansecuritysystems,videorecorders,cameras,thecontrolofautomaticwashingmachines,aswellasprogram-controlledtoys,electronicpet,etc.,whichareinseparablefromthesingle-chipmicrocomputer.Nottomentionthefieldofrobotautomation,intelligentin
7、strumentation,medicalequipmenthasbeen.Throughoutthedevelopmentprocessofsingle-chip,youcanindicatethedevelopmenttrendofsingle-chip,generallyare:1.Oflow-powerCMOSMCS-51seriesof8031introducedthepowerconsumptionof630mW,andnowwidespreadinthesingle-chip100mWorso,w
8、iththegrowingdemandforlow-powersingle-chip,andnowallthebasicsingle-chipmanufacturersareuseofCMOS(complementarymetaloxidesemiconductorprocess).Asthe80C51ontheuseofHMOS(highdensitymetaloxidesemico
