MicrocontrollerDevelopmentSinglechip,alsoknownassingle-chipmicrocomputerormicrocomputer.Itisthecentralprocessingunit(CPU),randomaccessmemory(RAM),read-onlymemory(ROM),input/outputports(I/O)andothermajorcomputerfeaturesareintegratedinamicrocomputerintegratedcircuitchip.Youcannowsaythattheflourishingperiodofthemicrocontrolleristheworld’smajorchipmanufacturingcompanieshavelaunchedtheirownmicrocontroller,fromthe8-bit,16-32,numerous,everything,theyaredistinctiveeachintoacomplementaryapplicationfortheMCUprovideavastworld.Throughoutthedevelopmentprocessofthemicrocontroller,canpredictthedevelopmenttrendofmicrocontroller.low-powerCMOStechnology8031MCS-51familyoflaunchpowerof630MW,andnowaboutSCMingeneralare100mW,whichlowerandlowerpowerrequirementsonthemicrocontroller,andnoweverysinglechipmanufacturershaveadoptedthebasicCOMS(complementarymetal-oxidesemiconductorprocess).80C51ontheuseofHMOS(i.e.,high-densitymetal-oxidesemiconductorprocess)andCHMOS(high-densitycomplementarymetal-oxidesemiconductorprocess).AlthoughCMOSlowpowerconsumption,butbecauseofitsphysicalcharacteristicsdeterminethespeedoftheirworkisnothighenough,andisequippedwithhigh-speedCHMOSandlowpowerconsumption,thesecharacteristicsmoresuitablefortherequirementsoflowpower,battery-poweredapplications.Therefore,thistechnologywillbethedevelopmentofthecomingperiodthemainwayMCU.themicro-monolithicNowtheconventionalsinglechipsaregenerallythecentralprocessor(CPU),randomaccessdatastorage(RAM),read-onlyprogrammemory(ROM),parallelandserialcommunicationinterface,interruptsystem,thetimingcircuit,clockcircuitintegratedinasinglechip,enhancedintegratedmicrocontroller,suchasA/Dconverter,PMW(pulsewidthmodulationcircuit),WDT(watchdog),somemicrocontrollerswillLCDdrivercircuitareintegratedinasinglechip.ThisMCUcontainscircuitrytomoreelements,featuresmorepowerful.SCMvendorsandeventheuser’srequirementscanbetailoredaccording,tocreateasinglechipwithitsowncharacteristics.Inaddition,theproductisnowtheuniversaldemandsmallsize,lightweight,w