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1、BasedonmonolithicintegratedcircuitautomobilesecurityalarmsystemdesignAbstract:Decodestheautomobilesecuritysystemusingthemonlitchisintegratedcircuitinteriorresourcesrealizationjumpcode,iteachtimeusestheremotecontrolpasswordallischanging,bothenhancedthesystemsecu
2、rity,andgreatlyreducedthecost.Keyword:Monolithicintegratedcircuit,Automobilesecuritysystem,Code/decodeIntroductionIsunceasinglyprogressivealongwiththesocialeconomyandthehightechrapiddevelopment,intheroutineworkandthelife,theautomobilehasbecomethepeopleidealtran
3、sportationvehicle.Butthefollowingmotorvehiclethecasewhichrobbedgraduallyisalsoincreasedhascreatedthepiloteconomicalpropertyloss.Inordertoreducetheautomobiletorobtheeventtheformationrate,forhastheautomobiletheusertoprovidethesafetycontrol,simplydevelopsonekindto
4、bereliable,theeaseofoperation,cansendoutinthediscoverynormalconditiontothepilotreportstothepolicethereminderandthesecuritywarningsafetysystemhasthepracticalsignificance.Thisarticlebasedontotheexistingautomobilesecurityalarmsystemgeneralizedanalysis,developsonek
5、indofbrand-newsecurityalarmsystem.Thissystemhasmainlyusedthejumpcodecode/decodingprinciple,causestheoverallsystemtobesafer,greatlyreducespasswordexplainingrate.1.SystemprincipleofworkTheautomobilesecurityalarmsystemtheremotecontrolwhichcarriesbythedriverandinst
6、allsintheautomobilethecontrollertwopartscomposes.TheremotecontrolandthecontrolleralluseeightCMOSwhichAmericanAT-MELCorporationproducestheAVRmonolithicintegratedcircuit,thisseriesmonolithicintegratedcircuitbasedonnewsimplifiesinstructionRtheISCstructure,includes
7、theservicelifemosttobefewis1,000timewrites/scratchesthecirculationtheFlashprogrammemory,aswellastheservicelifeatleastis100,000timewrites/scratchesthecirculationEtheEPROMdata-carrierstorage,some2onlyhavewhentheentirepiececleaningcancleantheprogrammingencryptionl
8、ocksthelocalization.1.1SystemdesignTheautomobilesecurityexaminationusestheultrasonicsensor.Theultrasonicsensoriscomposedbytheultrasonicwavetransmissioncircuitandthesupersoni
