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1、外文文献TheSCMandµVision2一、PrincipleofMCUSingle-chipisanintegratedonasinglechipacompletecomputersystem.Eventhoughmostofhisfeaturesinasmallchip,butithasaneedtocompletethemajorityofcomputercomponents:CPU,memory,internalandexternalbussystem,mostwillhavetheCore.Atthesametime,suchasintegratedc
2、ommunicationinterfaces,timers,real-timeclockandotherperipheralequipment.Andnowthemostpowerfulsingle-chipmicrocomputersystemcanevenvoice,image,networking,inputandoutputcomplexsystemintegrationonasinglechip.Alsoknownassingle-chipMCU(Microcontroller),becauseitwasfirstusedinthefieldofindu
3、strialcontrol.Onlybythesingle-chipCPUchipdevelopedfromthededicatedprocessor.ThedesignconceptisthefirstbyalargenumberofperipheralsandCPUinasinglechip,thecomputersystemsothatsmaller,moreeasilyintegratedintothecomplexanddemandingonthevolumecontroldevices.INTELtheZ80isoneofthefirstdesigni
4、naccordancewiththeideaoftheprocessor,Fromthenon,theMCUandthedevelopmentofadedicatedprocessorpartedways.Earlysingle-chip8-bitorallofthefour.OneofthemostsuccessfulisINTEL's8031,becausetheperformanceofasimpleandreliableaccesstoalotofgoodpraise.Sincethenin8031todevelopasingle-chipmicrocom
5、putersystemMCS51series.Basedonsingle-chipmicrocomputersystemofthesystemisstillwidelyuseduntilnow.Asthefieldofindustrialcontrolrequirementsincreaseinthebeginningofa16-bitsingle-chip,butnotidealbecausethepricehasnotbeenverywidelyused.Afterthe90'swiththebigconsumerelectronicsproductdevel
6、opment,single-chiptechnologyisahugeimprovement.INTELi960SerieswithsubsequentARMinparticular,abroadrangeofapplications,quicklyreplacedby32-bitsingle-chip16-bitsingle-chiphigh-endstatus,andenterthemainstreammarket.Traditional8-bitsingle-chipperformancehasbeentherapidincreaseinprocessing
7、powercomparedtothe80'storaiseafewhundredtimes.Atpresent,thehigh-end32-bitsingle-chipfrequencyover300MHz,theperformanceofthemid-90'scloseontheheelsofaspecialprocessor,whiletheordinarypriceofthemodeldroppedtooneU.S.dollars,themosthigh-endmodels,only10U.S.dollars.Contemporarysingle-chipm
8、icroc
