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《单片机系统可靠性技术及发展（reliability technology and development of single chip microcomputer system）》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。
1、单片机系统可靠性技术及发展（Reliabilitytechnologyanddevelopmentofsinglechipmicrocomputersystem）Reliabilitytechnologyanddevelopmentofsinglechipmicrocomputersystem(ShaoBeibei)TsinghuaMotorolamicrocontrollerapplicationdevelopmentresearchcenter(100084)BeibeiShaoAbstract:Thispaperintroducestheef
2、fortanddevelopmentofSCMtechnologyinprovidingsystemreliabilityinrecentyears.ReminduserstopayattentiontotheselectionofSCM,SCMapplicationsystemdesignandmanufacturingprocess,inordertoachieveahighreliabilityMCUapplicationsystem.Keywords:singlechipmicrocomputer,reliability,EMCWithth
3、erapiddevelopmentofsemiconductortechnology,somenewanti-interferencetechniquesareadoptedinthedesignofsinglechipmicrocomputer,whichmakesthereliabilityofMCUimprovecontinuously.Inadditiontothechoiceofanti-interferenceabilityofthemicrocontroller,thereliabilityofotherauxiliarycompon
4、entsintheSCMsystemisalsocritical,andsomeinterferencesuppressioncomponentstohelpimprovethereliabilityofthesystem.Inaddition,SCMsysteminthecircuitdesign,PCBdesign,wiringandmanufacturingprocess,systeminstallationhasgoodgrounding,etc.,alldirectlyaffectthereliabilityoftheapplicatio
5、nsystem.AntiinterferencemeasuresofsinglechipmicrocomputerInordertoimprovethereliabilityofsinglechipmicrocomputeritself.Inrecentyears,SCMmanufacturershavetakenaseriesofmeasuresinthedesignofSCMtoimprovereliability.Thesetechnologiesaremainlyembodiedinthefollowingaspects.1.reducet
6、heexternalclockfrequencyExternalclockisahighfrequencynoisesource,inadditiontocausinginterferencetotheapplicationsystem,butalsomaycauseinterferencetotheoutsideworld,sothatelectromagneticcompatibilitytestingcannotreachthestandard.Intheapplicationsystemwithhighreliability,itisone
7、oftheprinciplestoreducethesystemnoisebyselectingthesinglechipmicrocomputerwithlowfrequency.Take8051single-chipmicrocomputerasanexample,theminimuminstructioncycleis1s,andtheexternalclockis12MHz.AndthesamespeedofMotorolamicrocontrollersystemclockonly4MHz,moresuitableforindustria
8、lcontrolsystem.Inrecentyears,somemanufacturersof8051compatibl
