EmbeddedSystemDesign《嵌入式系统设计》课后答案(英文版)(8)

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1.GeneralPurposeProcessor

Ageneral-purposeprocessorconsistsofacontroller,generaldatapath,http://www.77cn.com.cningageneral-purposeprocessor,thetimetomarketandNREcostislow.

2.SinglePurposeProcessor

Adigitalcircuitdesignedtoexecuteexactlyoneprogram.Sinceasinglepurposeprocessorisdesignedforonlyonetaskitwillhavehighperformance,smallsize,andlowpowerconsumption.

3.ApplicationSpecificInstructionSetProcessor(ASIP)

Thisisacompromisebetweenageneralpurposeprocessorandasinglepurposeprocessor.Itisaprogrammableprocessoroptimizedforaparticularclassofapplications.AnASIPallowsflexibilitywhilestillachievinggoodperformance,size,andpowerconsumption.

1.16ListanddefinethethreemainICtechnologies.Whatarethebenefitsofusingeachof

thethreedifferentICtechnologies?

1.Full-Custom/VLSI

AlllayersofthisICisoptimizedandwillthereforeyieldexcellentperformance,smallsize,andlowpowerconsumption.

2.Semi-customASIC(GateArrayandStandardCell)

Thelowerlayersarefullyorpartiallybuilt,leavingtheupperlayerstobefinishedbythedesigner.Thisyieldsgoodperformance,size,andalowerNREcostthanthatofafull-customIC.

3.ProgrammableLogicDevice(PLD)

AlllayersalreadyexistsothedesignercanpurchaseanIC.PLDsofferlowNREcostsandalmostinstantICavailability.PLDsarewellsuitedforrapidprototyping.

1.17Listanddefinethethreemaindesigntechnologies.Howareeachofthethreedifferent

designtechnologieshelpfultodesigners?

http://www.77cn.com.cnpilation/Synthesis

Thisdesigntechnologyallowsadesignertodefinefunctionalityinanabstractmannerandthetechnologywillautomaticallygeneratethelower-levelimplementationdetails.Designersbenefitbecausetheydonothavetobeawareofthelower-levelimplementationdetails,whichwillincreasetheirproductivity.

6EmbeddedSystemDesign

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