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1、ABOUTSCMItcanbesaidacrossthetwentiethcentury,thethree"electric"era,thatis,electricalera,theelectronicage,andhasnowenteredthecomputerage.However,suchacomputer,usuallyreferstothepersonalcomputer,referredtoasPC.Itconsistsofthehost,keyboard,monitoretc..Anothertyp
2、eofcomputer,mostpeopledonotknowhow.Thiscomputeristosmarttogiveavarietyofmechanicalmicrocontroller(alsoknownasmicro-controller).Asthenamesuggests,thiscomputersystemonlyusedthesmallestoneIC,youcanperformsimpleoperationsandcontrol.Becauseofitssmallsize,usuallyhi
3、ddeninachargedmechanical"stomach"Lane.Itistheentiredevice,likethehumanbrainplaysarole,itgoeswrong,thewholedevicewasparalyzed.Now,thisMCUhasaverywidefieldofuse,suchassmartmeters,real-timeindustrialcontrol,communicationsequipment,navigationsystems,homeappliance
4、sandsoon.Oncethemicrocontrollerwereusingavarietyofproducts,youcanservetoupgradetheeffectivenessoftheproduct,oftenintheproductnameisprecededbytheadjective-"smart",suchaswashingmachinesandsointelligent.Atpresent,sometechnicalpersonneloffactoriesorotheramateurel
5、ectronicsdeveloperstoengageinoutofcertainproducts,notthecircuitistoocomplex,thatis,functionsaretoosimpleandeasytobecopied.Thereasonmaybestuckintheproductwithouttheuseofamicrocontrollerorotherprogrammablelogicdevice.SCMbasiccomponentisacentralprocessingunit(CP
6、Uinthecomputingdeviceandcontroller),read-onlymemory(usuallyexpressedasaROM),read-writememory(alsoknownasRandomAccessMemoryMRAMisusuallyexpressedasaRAM),input/outputport(alsodividedintoparallelportandserialport,expressedasI/Oport),andsocomposed.Infactthereisal
7、soaclockcircuitmicrocontroller,sothatduringoperationandcontrolofthemicrocontroller,canrhythmicmanner.Inaddition,thereareso-called"breaksystem",thesystemisa"janitor"role,whenthemicrocontrollercontrolobjectparametersthatneedtobeinterventiontoreachaparticularsta
8、te,canafterthis"janitor"communicatedtotheCPU,sothatCPUprioritiesoftheexternaleventstotakeappropriatecounter-measures.Electricboilertemperaturesystem1.MCUAmicrocontroller(orMCU)isacomputer
