电子信息工程专业英语教程（第5版） 课件 Lesson 25 Choosing the right core

Lesson25Choosingtherightcore《电子信息工程专业英语教程（第5版）》Unit9EmbeddedApplicationLesson25ChoosingtherightcoreBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques2024/5/292《电子信息工程专业英语教程（第5版）》TerminologyLifespan

使用期限，平均生命期，存在时间billofmaterials

材料单cross-compiler

交叉编译器Backgrounds2024/5/293《电子信息工程专业英语教程（第5版）》TerminologyCISC:ComplexInstructionSetComputer

复杂指令集计算机RISC:ReducedInstructionSetComputer

精简指令集计算机PDA:PersonalDigitalAssistant

个人数字助理Backgrounds2024/5/294《电子信息工程专业英语教程（第5版）》TexttourOutlineIntroduction(para.1,2)CISCPlatformsandIntelx86Core(para.3-5)AdvantagesDownsidesRecommendationRISCPlatformsandARMCore(para.6-9)DiscussiononsomecandidatesARM’sadvantagesSummary2024/5/295《电子信息工程专业英语教程（第5版）》Main32-bitcoresonthemarketatthemomentIntelx86PowerPCMIPSSuperHARM.Introduction2024/5/296《电子信息工程专业英语教程（第5版）》YoucanusealmostanyPC-compatibleoperatingsystem,andfreesoftwaredevelopmenttools.InstallingoperatingsystemsissimpleItissimpletointerfaceliterallythousandsofperipheralcomponentsforalmostanyimaginablefunction.DriversupportexistsforalmostanypieceofhardwareHighlyintegratedmainboardsareavailableMigratingtoaslightlydifferenthardwareplatformisrelativelysimpleCISCPlatformsandIntelx86Core

Advantages

2024/5/297《电子信息工程专业英语教程（第5版）》VeryexpensiveFewaretrue“systemonchip”devicesSignificantpowerconsumption,heatandsizedisadvantages.Modernx86partsandtheirsupportchipsareveryhigh-speeddevicesindensepackages.PCperipheralICsoftenhaveveryshortproductionlifespansCISCPlatformsandIntelx86Core

Downsides

2024/5/298《电子信息工程专业英语教程（第5版）》Codetocold-boota“bare”PCplatformisusuallyverycomplicatedJTAG-basedorotherhardwaredebuggingsystemsaren’tusuallyavailableCISCPlatformsandIntelx86Core

Downsides

2024/5/299《电子信息工程专业英语教程（第5版）》Irecommendx86astheplatformofchoiceIfyouarebuildingjustafewofyourapplianceIfyouareprototypingsomethingandwanttopulltogetheralotofmiscellaneoushardwarefeatureswithoutspendingalotoftimedebuggingthehardwaredesignIt’salsoagoodchoiceforaninitialproductionrunthatyoucanshiptoearlyadopterswhileyouaredevelopingacheapersecond-roundcustomizedhardwaredesign.CISCPlatformsandIntelx86Core

Recommendation2024/5/2910《电子信息工程专业英语教程（第5版）》MIPS,SuperHandPowerPCaregoodcandidatesformanyapplicationsSuperHfamilyislargeandcontainsawidevarietyofusefuldevicesMIPSseemstobeamorewidelylicensedcoreinthird-partyASICsandASSPs

PowerPCseemstobefoundmainlyinapplicationsrequiringveryhighperformanceMyprimaryrecommendationfora32-bitembeddedplatformisARMRISCPlatformsandARMCore

Discussiononsomecandidates

2024/5/2911《电子信息工程专业英语教程（第5版）》Amature,well-understoodarchitectureSmall,excellentpowerconsumptionvs.performancecharacteristics.ManyfeaturesaretunablebythechipdesignerAhugenumberofattractivelypricedpartsonthemarketReferencedesignsformanydifferentperipheralsAhugeamountoffreelyavailableintellectualpropertyRISCPlatformsandARMCore

ARM’sadvantages2024/5/2912《电子信息工程专业英语教程（第5版）》ARMisthe32-bit8051ARMistheuniversal32-bitmicrocontrollercoreknowntoeverybodyandusedeverywhereARMistotheembeddedworldwhatx86istothedesktopPCworld.RISCPlatformsandARMCore

Summary

2024/5/2913《电子信息工程专业英语教程（第5版）》VocabularyNormrefinementvariantpropertycontractlifespanStructureReading/writingtechniquesLanguageinuse2024/5/2914《电子信息工程专业英语教程（第5版）》Vocabulary2024/5/2915《电子信息工程专业英语教程（第5版）》NormindictionaryAstandard,model,orpatternregardedastypical:

标准，模型，式样Amode.

模式Anaverage.

平均Thelengthofavector.

向量长度2024/5/2916《电子信息工程专业英语教程（第5版）》Normintext

Comparethistothenorm

withembeddedsystems,whereyouwillneedtolookattheboard,workoutthehardwareconfigurationyourself,andsysgen

thekernelanddriversetonexternalhardware,probablyusingacross-compiler.这一点就和嵌入式系统的规矩不一样：用户需要察看电路板、自己完成硬件配置的设置、（很可能使用交叉编译器）生成系统内核和外部硬件的驱动程序。2024/5/2917《电子信息工程专业英语教程（第5版）》RefinementindictionaryTheactofrefining.

提炼Theresultofrefining;animprovementorelaboration.

改进，精心制作Thestateorqualityofbeingrefined;cultivation,asinmannersortaste.

高雅；有教养Akeenorprecisephrasing;asubtledistinction.

精妙用语；细微差别2024/5/2918《电子信息工程专业英语教程（第5版）》RefinementintextItisamature,well-understoodarchitecturewithasolidengineeringhistoryandmanyrefinements.ARM是一个成熟的、为人熟知的结构。它有翔实可靠的工程应用历史，并且做过许多改进。2024/5/2919《电子信息工程专业英语教程（第5版）》VariantindictionaryHavingorexhibitingvariation;differing.

相异的，不同的Tendingorliabletovary;variable.

易变的；变化的Deviatingfromastandard,usuallybyonlyaslightdifference.

变异的Somethingthatdiffersinformonlyslightlyfromsomethingelse,asadifferentspellingorpronunciationofthesameword.

异体2024/5/2920《电子信息工程专业英语教程（第5版）》Variantintext

Ihavefoundthemtobefairlydifficulttodevelopwithonashoestringbudget;evaluationhardwareisusuallycostly,andmostvariantsofthesepartsarenotreadilyavailabletobuyerswhoareunabletodemonstrateaneedforlargequantities.我发现用很少的资金去开发这些微处理器都是很困难的；大多数评估硬件通常很贵，而是那些表现不出将会大量订货的购买者也不会立即得到这些器件。2024/5/2921《电子信息工程专业英语教程（第5版）》PropertyindictionarySomethingowned;apossession.

财产；占有物Apieceofrealestate:

不动产Somethingtangibleorintangibletowhichitsownerhaslegaltitle:

所有物Possessionsconsideredasagroup.

资产2024/5/2922《电子信息工程专业英语教程（第5版）》PropertyindictionaryTherightofownership;title.

所有权Acharacteristictraitorpeculiarity,especiallyoneservingtodefineordescribeitspossessor.

特性，属性Acharacteristicattributepossessedbyallmembersofaclass.

固有属性Aspecialcapabilityorpower;avirtue:

特性2024/5/2923《电子信息工程专业英语教程（第5版）》Propertyintext

Partlybecauseoftheabovefactors,thereisahugeamountoffreelyavailableintellectualproperty

alreadyextantforthiscore.部分由于上述因素，业界存在着大量用于ARM内核的免费IP。2024/5/2924《电子信息工程专业英语教程（第5版）》Propertyinuse

algebraicproperty代数性质corporealproperty有形财产ergodicproperty遍历性incorporealproperty无形财产2024/5/2925《电子信息工程专业英语教程（第5版）》Propertyinuse

inertialproperty惯性integralproperty积分性质intrinsicproperty固有特性literaryproperty著作权,版权2024/5/2926《电子信息工程专业英语教程（第5版）》ContractindictionaryAnagreementbetweentwoormoreparties,especiallyonethatiswrittenandenforceablebylaw.

合同，契约Thewritingordocumentcontainingsuchanagreement.

合同文本Thebranchoflawdealingwithformalagreementsbetweenparties.

合同法规范Marriageasaformalagreement;betrothal.

婚约2024/5/2927《电子信息工程专业英语教程（第5版）》ContractindictionaryToenterintobycontract;establishorsettlebyformalagreement:

定约Toacquireorincur:

取得或招致Toreduceinsizebydrawingtogether;shrink.

收缩2024/5/2928《电子信息工程专业英语教程（第5版）》ContractintextModernx86partsandtheirsupportchipsareveryhigh-speeddevicesindensepackages.Itisvirtuallyimpossibletohand-prototypeyourowndesignbasedaroundtheseparts;unlessyouwanttospendmanythousandsofdollarsonequipment,attheveryleastyouwillhavetocontractoutsomeassemblywork.现代x86器件及其支撑芯片都是高密度封装形式的高速器件。实际上，不可能以这种器件为基础手工设计样机；除非您想在设备上投入数万美元，但也不得不将其中一些装配工作承包出去。2024/5/2929《电子信息工程专业英语教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Tocontractistodrawtogether,especiallybyaninternalforce,witharesultantreductioninsize,extent,orvolume:Thepupiloftheeyedilatesandcontractsinresponsetolight.2024/5/2930《电子信息工程专业英语教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Condensereferstoareductioninvolumeandanincreaseincompactness:Toproducesnowrequiresbothheatandcold;thefirsttoevaporate,thesecondtocondense.Thechairmancondensedallthesuggestionsputforwardintoasingleplanofaction.2024/5/2931《电子信息工程专业英语教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Compressappliestoincreasedcompactnessbroughtaboutbypressingorsqueezing;thetermimpliesreductioninvolumeandchangeofformorshape:tryingtocompressmythoughtsintoafewwords.2024/5/2932《电子信息工程专业英语教程（第5版）》Contractinuse

contractcondense