电子技术专业英语教学课件作者何茗unit13.ppt

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1、Unit13TheFPGASectionFieldprogrammablegatearray(FPGA)technologycontinuestogainmomentum,andtheworldwideFPGAmarketisexpectedtogrowfrom$1.9billionin2005to$2.75billionby2010.SinceitsinventionbyXilinxin1984,FPGAshavegonefrombeingsimplegluelogicchipstoactuall

2、yreplacingcustomapplicationspecificintegratedcircuits(ASICs)andprocessorsforsignalprocessingandcontrolapplications.Whyhasthistechnologybeensosuccessful?ThisarticleprovidesanintroductiontoFPGAsandhighlightssomeofthebenefitsthatmakeFPGAsunique.下一页返回Unit

3、13TheFPGASectionWhatisanFPGA?Atthehighestlevel,FPGAsarereprogrammablesiliconchips.Usingprebuiltlogicblocksandprogrammableroutingresources,youcanconfigurethesechipstoimplementcustomhardwarefunctionalitywithouteverhavingtopickupabreadboardorsolderingiron.

4、Youdevelopdigitalcomputingtasksinsoftwareandcompilethemdowntoaconfigurationfileorbitstreamthatcontainsinformationonhowthecomponentsshouldbewiredtogether下一页上一页返回Unit13TheFPGASectionInaddition,FPGAsarecompletelyreconfigurableandinstantlytakeonabrandnew“pe

5、rsonality”whenyourecompileadifferentconfigurationofcircuitry.Inthepast,FPGAtechnologywasonlyavailabletoengineerswithadeepunderstandingofdigitalhardwaredesign.Theriseofhighleveldesigntools,however,ischangingtherulesofFPGAprogramming,withnewtechnologiest

6、hatconvertgraphicalblockdiagramsorevenCcodeintodigitalhardwarecircuitry.下一页上一页返回Unit13TheFPGASectionFPGAchipadoptionacrossallindustriesisdrivenbythefactthatFPGAscombinethebestpartsofASICsandprocessorbasedsystems.FPGAsprovidehardwaretimedspeedandreliabi

7、lity,buttheydonotrequirehighvolumestojustifythelargeupfrontexpenseofcustomASICdesign.Reprogrammablesiliconalsohasthesameflexibilityofsoftwarerunningonaprocessorbasedsystem,butitisnotlimitedbythenumberofprocessingcoresavailable.Unlikeprocessors,FPGAsaret

8、rulyparallelinnaturesodifferentprocessingoperationsdonothavetocompeteforthesameresources.affectedwhenadditionalprocessingisadded.下一页上一页返回Unit13TheFPGASectionEachindependentprocessingtaskisassignedtoadedicatedsectionofthechip,and