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时间:2018-07-22
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1、Single-chip1.Thedefinitionofasingle-chipSingle-chipisanintegratedonasinglechipacompletecomputersystem.Eventhoughmostofhisfeaturesinasmallchip,butithasaneedtocompletethemajorityofcomputercomponents:CPU,memory,internalandexternalbussystem,mostwillhavetheCore.Atthesametime,suchas
2、integratedcommunicationinterfaces,timers,real-timeclockandotherperipheralequipment.Andnowthemostpowerfulsingle-chipmicrocomputersystemcanevenvoice,image,networking,inputandoutputcomplexsystemintegrationonasinglechip.Alsoknownassingle-chipMCU(Microcontroller),becauseitwasfirstu
3、sedinthefieldofindustrialcontrol.Onlybythesingle-chipCPUchipdevelopedfromthededicatedprocessor.ThedesignconceptisthefirstbyalargenumberofperipheralsandCPUinasinglechip,thecomputersystemsothatsmaller,moreeasilyintegratedintothecomplexanddemandingonthevolumecontroldevices.INTELt
4、heZ80isoneofthefirstdesigninaccordancewiththeideaoftheprocessor,Fromthenon,theMCUandthedevelopmentofadedicatedprocessorpartedways.Earlysingle-chip8-bitorallthefour.OneofthemostsuccessfulisINTELs8031,becausetheperformanceofasimpleandreliableaccesstoalotofgoodpraise.Sincethenin8
5、031todevelopasingle-chipmicrocomputersystemMCS51series.basedonsingle-chipmicrocomputersystemofthesystemisstillwidelyuseduntilnow.Asthefieldofindustrialcontrolrequirementsincreaseinthebeginningofa16-bitsingle-chip,butnotidealbecausethepricehasnotbeenverywidelyused.Afterthe90swi
6、ththebigconsumerelectronicsproductdevelopment,single-chiptechnologyisahugeimprovement.INTELi960serieswithsubsequentARMinparticular,abroadrangeofapplication,quicklyreplacedby32-bitsingle-chip16-bitsingle-chipperformancehasbeentherapidincreaseinprocessingpowercomparedtothe80stor
7、aiseafewhundredtimes.Atpresent,thehigh-end32-bitsingle-chipfrequencyover300MHz,theperformanceofthemid-90scloseontheheelsofaspecialprocessor,whiletheordinarypriceofthemodeldroppedtooneU.Sdollars,themosthigh-endmodels,only10U.Sdollars.Contemporarysingle-chipmicrocomputersystemis
8、nolongeronlythebare-metalenvironmentinthedevelopmentanduseofa
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