電子信息工程專業(yè)英語教程（第5版） 課件 Lesson 25 Choosing the right core

Lesson25Choosingtherightcore《電子信息工程專業(yè)英語教程（第5版）》Unit9EmbeddedApplicationLesson25ChoosingtherightcoreBackgroundsTexttour

LanguageinuseVocabularyStructureReading/writingtechniques2024/5/292《電子信息工程專業(yè)英語教程（第5版）》TerminologyLifespan

使用期限，平均生命期，存在時(shí)間billofmaterials

材料單cross-compiler

交叉編譯器Backgrounds2024/5/293《電子信息工程專業(yè)英語教程（第5版）》TerminologyCISC:ComplexInstructionSetComputer

復(fù)雜指令集計(jì)算機(jī)RISC:ReducedInstructionSetComputer

精簡指令集計(jì)算機(jī)PDA:PersonalDigitalAssistant

個(gè)人數(shù)字助理Backgrounds2024/5/294《電子信息工程專業(yè)英語教程（第5版）》TexttourOutlineIntroduction(para.1,2)CISCPlatformsandIntelx86Core(para.3-5)AdvantagesDownsidesRecommendationRISCPlatformsandARMCore(para.6-9)DiscussiononsomecandidatesARM’sadvantagesSummary2024/5/295《電子信息工程專業(yè)英語教程（第5版）》Main32-bitcoresonthemarketatthemomentIntelx86PowerPCMIPSSuperHARM.Introduction2024/5/296《電子信息工程專業(yè)英語教程（第5版）》YoucanusealmostanyPC-compatibleoperatingsystem,andfreesoftwaredevelopmenttools.InstallingoperatingsystemsissimpleItissimpletointerfaceliterallythousandsofperipheralcomponentsforalmostanyimaginablefunction.DriversupportexistsforalmostanypieceofhardwareHighlyintegratedmainboardsareavailableMigratingtoaslightlydifferenthardwareplatformisrelativelysimpleCISCPlatformsandIntelx86Core

Advantages

2024/5/297《電子信息工程專業(yè)英語教程（第5版）》VeryexpensiveFewaretrue“systemonchip”devicesSignificantpowerconsumption,heatandsizedisadvantages.Modernx86partsandtheirsupportchipsareveryhigh-speeddevicesindensepackages.PCperipheralICsoftenhaveveryshortproductionlifespansCISCPlatformsandIntelx86Core

Downsides

2024/5/298《電子信息工程專業(yè)英語教程（第5版）》Codetocold-boota“bare”PCplatformisusuallyverycomplicatedJTAG-basedorotherhardwaredebuggingsystemsaren’tusuallyavailableCISCPlatformsandIntelx86Core

Downsides

2024/5/299《電子信息工程專業(yè)英語教程（第5版）》Irecommendx86astheplatformofchoiceIfyouarebuildingjustafewofyourapplianceIfyouareprototypingsomethingandwanttopulltogetheralotofmiscellaneoushardwarefeatureswithoutspendingalotoftimedebuggingthehardwaredesignIt’salsoagoodchoiceforaninitialproductionrunthatyoucanshiptoearlyadopterswhileyouaredevelopingacheapersecond-roundcustomizedhardwaredesign.CISCPlatformsandIntelx86Core

Recommendation2024/5/2910《電子信息工程專業(yè)英語教程（第5版）》MIPS,SuperHandPowerPCaregoodcandidatesformanyapplicationsSuperHfamilyislargeandcontainsawidevarietyofusefuldevicesMIPSseemstobeamorewidelylicensedcoreinthird-partyASICsandASSPs

PowerPCseemstobefoundmainlyinapplicationsrequiringveryhighperformanceMyprimaryrecommendationfora32-bitembeddedplatformisARMRISCPlatformsandARMCore

Discussiononsomecandidates

2024/5/2911《電子信息工程專業(yè)英語教程（第5版）》Amature,well-understoodarchitectureSmall,excellentpowerconsumptionvs.performancecharacteristics.ManyfeaturesaretunablebythechipdesignerAhugenumberofattractivelypricedpartsonthemarketReferencedesignsformanydifferentperipheralsAhugeamountoffreelyavailableintellectualpropertyRISCPlatformsandARMCore

ARM’sadvantages2024/5/2912《電子信息工程專業(yè)英語教程（第5版）》ARMisthe32-bit8051ARMistheuniversal32-bitmicrocontrollercoreknowntoeverybodyandusedeverywhereARMistotheembeddedworldwhatx86istothedesktopPCworld.RISCPlatformsandARMCore

Summary

2024/5/2913《電子信息工程專業(yè)英語教程（第5版）》VocabularyNormrefinementvariantpropertycontractlifespanStructureReading/writingtechniquesLanguageinuse2024/5/2914《電子信息工程專業(yè)英語教程（第5版）》Vocabulary2024/5/2915《電子信息工程專業(yè)英語教程（第5版）》NormindictionaryAstandard,model,orpatternregardedastypical:

標(biāo)準(zhǔn)，模型，式樣Amode.

模式Anaverage.

平均Thelengthofavector.

向量長度2024/5/2916《電子信息工程專業(yè)英語教程（第5版）》Normintext

Comparethistothenorm

withembeddedsystems,whereyouwillneedtolookattheboard,workoutthehardwareconfigurationyourself,andsysgen

thekernelanddriversetonexternalhardware,probablyusingacross-compiler.這一點(diǎn)就和嵌入式系統(tǒng)的規(guī)矩不一樣：用戶需要察看電路板、自己完成硬件配置的設(shè)置、（很可能使用交叉編譯器）生成系統(tǒng)內(nèi)核和外部硬件的驅(qū)動(dòng)程序。2024/5/2917《電子信息工程專業(yè)英語教程（第5版）》RefinementindictionaryTheactofrefining.

提煉Theresultofrefining;animprovementorelaboration.

改進(jìn)，精心制作Thestateorqualityofbeingrefined;cultivation,asinmannersortaste.

高雅；有教養(yǎng)Akeenorprecisephrasing;asubtledistinction.

精妙用語；細(xì)微差別2024/5/2918《電子信息工程專業(yè)英語教程（第5版）》RefinementintextItisamature,well-understoodarchitecturewithasolidengineeringhistoryandmanyrefinements.ARM是一個(gè)成熟的、為人熟知的結(jié)構(gòu)。它有翔實(shí)可靠的工程應(yīng)用歷史，并且做過許多改進(jìn)。2024/5/2919《電子信息工程專業(yè)英語教程（第5版）》VariantindictionaryHavingorexhibitingvariation;differing.

相異的，不同的Tendingorliabletovary;variable.

易變的；變化的Deviatingfromastandard,usuallybyonlyaslightdifference.

變異的Somethingthatdiffersinformonlyslightlyfromsomethingelse,asadifferentspellingorpronunciationofthesameword.

異體2024/5/2920《電子信息工程專業(yè)英語教程（第5版）》Variantintext

Ihavefoundthemtobefairlydifficulttodevelopwithonashoestringbudget;evaluationhardwareisusuallycostly,andmostvariantsofthesepartsarenotreadilyavailabletobuyerswhoareunabletodemonstrateaneedforlargequantities.我發(fā)現(xiàn)用很少的資金去開發(fā)這些微處理器都是很困難的；大多數(shù)評估硬件通常很貴，而是那些表現(xiàn)不出將會(huì)大量訂貨的購買者也不會(huì)立即得到這些器件。2024/5/2921《電子信息工程專業(yè)英語教程（第5版）》PropertyindictionarySomethingowned;apossession.

財(cái)產(chǎn)；占有物Apieceofrealestate:

不動(dòng)產(chǎn)Somethingtangibleorintangibletowhichitsownerhaslegaltitle:

所有物Possessionsconsideredasagroup.

資產(chǎn)2024/5/2922《電子信息工程專業(yè)英語教程（第5版）》PropertyindictionaryTherightofownership;title.

所有權(quán)Acharacteristictraitorpeculiarity,especiallyoneservingtodefineordescribeitspossessor.

特性，屬性Acharacteristicattributepossessedbyallmembersofaclass.

固有屬性Aspecialcapabilityorpower;avirtue:

特性2024/5/2923《電子信息工程專業(yè)英語教程（第5版）》Propertyintext

Partlybecauseoftheabovefactors,thereisahugeamountoffreelyavailableintellectualproperty

alreadyextantforthiscore.部分由于上述因素，業(yè)界存在著大量用于ARM內(nèi)核的免費(fèi)IP。2024/5/2924《電子信息工程專業(yè)英語教程（第5版）》Propertyinuse

algebraicproperty代數(shù)性質(zhì)corporealproperty有形財(cái)產(chǎn)ergodicproperty遍歷性incorporealproperty無形財(cái)產(chǎn)2024/5/2925《電子信息工程專業(yè)英語教程（第5版）》Propertyinuse

inertialproperty慣性integralproperty積分性質(zhì)intrinsicproperty固有特性literaryproperty著作權(quán),版權(quán)2024/5/2926《電子信息工程專業(yè)英語教程（第5版）》ContractindictionaryAnagreementbetweentwoormoreparties,especiallyonethatiswrittenandenforceablebylaw.

合同，契約Thewritingordocumentcontainingsuchanagreement.

合同文本Thebranchoflawdealingwithformalagreementsbetweenparties.

合同法規(guī)范Marriageasaformalagreement;betrothal.

婚約2024/5/2927《電子信息工程專業(yè)英語教程（第5版）》ContractindictionaryToenterintobycontract;establishorsettlebyformalagreement:

定約Toacquireorincur:

取得或招致Toreduceinsizebydrawingtogether;shrink.

收縮2024/5/2928《電子信息工程專業(yè)英語教程（第5版）》ContractintextModernx86partsandtheirsupportchipsareveryhigh-speeddevicesindensepackages.Itisvirtuallyimpossibletohand-prototypeyourowndesignbasedaroundtheseparts;unlessyouwanttospendmanythousandsofdollarsonequipment,attheveryleastyouwillhavetocontractoutsomeassemblywork.現(xiàn)代x86器件及其支撐芯片都是高密度封裝形式的高速器件。實(shí)際上，不可能以這種器件為基礎(chǔ)手工設(shè)計(jì)樣機(jī)；除非您想在設(shè)備上投入數(shù)萬美元，但也不得不將其中一些裝配工作承包出去。2024/5/2929《電子信息工程專業(yè)英語教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Tocontractistodrawtogether,especiallybyaninternalforce,witharesultantreductioninsize,extent,orvolume:Thepupiloftheeyedilatesandcontractsinresponsetolight.2024/5/2930《電子信息工程專業(yè)英語教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Condensereferstoareductioninvolumeandanincreaseincompactness:Toproducesnowrequiresbothheatandcold;thefirsttoevaporate,thesecondtocondense.Thechairmancondensedallthesuggestionsputforwardintoasingleplanofaction.2024/5/2931《電子信息工程專業(yè)英語教程（第5版）》Contractinuse

contractcondensecompressconstrictshrink

Theseverbsmeantodecreaseinsizeorcontent.Compressappliestoincreasedcompactnessbroughtaboutbypressingorsqueezing;thetermimpliesreductioninvolumeandchangeofformorshape:tryingtocompressmythoughtsintoafewwords.2024/5/2932《電子信息工程專業(yè)英語教程（第5版）》Contractinuse

contractcondense