資源描述：
《ARM7的體系結(jié)構(gòu)介紹 外文翻譯》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、畢業(yè)設(shè)計(jì)(論文)外文資料翻譯系別：電子信息系專(zhuān)業(yè)：通信工程班級(jí)：姓名：學(xué)號(hào)：外文出處：附件：1.原文；2.譯文2014年03月AnIntroductiontotheARM7ArchitectureTrevorMartinCEng,MIEETechnicalDirectorThisarticlegivesanoverviewoftheARM7architectureandadescriptionofitsmajorfeaturesforadevelopernewtothedevice.Futurearticleswillexamineoth
2、eraspectsoftheARMarchitecture.BasicCharacteristicsTheprinciplefeatureoftheARM7microcontrolleristhatitisaregisterbasedload-and-storearchitecturewithanumberofoperatingmodes.WhiletheARM7isa32bitmicrocontroller,itisalsocapableofrunninga16-bitinstructionset,knownas"THUMB".This
3、helpsitachieveagreatercodedensityandenhancedpowersaving.Whilealloftheregister-to-registerdataprocessinginstructionsaresingle-cycle,otherinstructionssuchasdatatransferinstructions,aremulti-cycle.Toincreasetheperformanceoftheseinstructions,theARM7hasathree-stagepipeline.Due
4、totheinherentsimplicityofthedesignandlowgatecount,ARM7istheindustryleaderinlow-powerprocessingonawattsperMIPbasis.Finally,toassistthedeveloper,theARMcorehasabuilt-inJTAGdebugportandon-chip"embeddedICE"thatallowsprogramstobedownloadedandfullydebuggedin-system.Inordertokeep
5、theARM7bothsimpleandcost-effective,thecodeanddataregionsareaccessedviaasingledatabus.ThuswhiletheARM7iscapableofsingle-cycleexecutionofalldataprocessinginstructions,datatransferinstructionsmaytakeseveralcyclessincetheywillrequireatleasttwoaccessesontothebus(onefortheinstr
6、uctiononeforthedata).Inordertoimproveperformance,athreestagepipelineisusedthatallowsmultipleinstructionstobeprocessedsimultaneously.Thepipelinehasthreestages;FETCH,DECODEandEXECUTE.Thehardwareofeachstageisdesignedtobeindependentsouptothreeinstructionscanbeprocessedsimulta
7、neously.Thepipelineismosteffectiveinspeedingupsequentialcode.Howeverabranchinstructionwillcausethepipelinetobeflushedmarringitsperformance.AsweshallseelatertheARM7designershadsomecleverideastosolvethisproblem.Fig1ARM3-StagepipelineARM7ProgrammingModelTheprogrammer'smodelo
8、ftheARM7consistsof15userregisters,asshowninFig.3,withR15beingusedastheProgramCounter(PC).Sinceth
