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1、上海交通大学工程硕士学位论文摘要本文深入分析了XSR闪存管理架构，设计和完善基于XSR架构的ROMWriter烧片软件程序。基于XSR架构的ROMWriter烧片流程主要实现了XSR的Reservoir管理区的生成，构建用于NAND坏块替换的映射表，并根据当前已有的每256字节计算3字节ECC校验码进行1bit检错纠错的算法，扩展为每512字节计算3字节ECC校验码以更好的匹配适应NANDFlash的基本单位扇区的大小。最终基于XSR闪存管理架构的ROMWriter烧片设计的实现与完善，有效的提升了产线
2、生产效率、降低了生产成本，取得了预期的效果。关键词：NANDFlash，闪存管理架构，烧片，坏块替换映射，ECCII上海交通大学工程硕士学位论文ABSTRACTResearchandDesignofROMWriterSoftwarebasedonNANDFlashManagementArchitectureforEmbeddedDevicesABSTRACTAsthedevelopingoftheiOSandAndroiduseroperationsysteminembeddedmobilephonei
3、ndustry,newsmartphonebecomesmoreandmorepopular,gettingmoremarketsharewhichwasoccupiedbyfeaturephone.Withtheevolutionoftheproductform,somenewdemandsarerequiredintheproductionlineprocessaccordingly.Fortheconsiderationofvariousfactorssuchastheformofproducts
4、,demand,andfunction,NANDFlashiswidelyusedaspower-downstoragedevicesofmobilephoneinthemobilephoneindustry.NANDFlash,duetothespecialnatureoftheprocess,mustbeoperatedandmaintainedbyspecialalgorithmormanagementsoftware,andthequalityofthealgorithmormanagement
5、softwarewillgreatlyaffecttheperformanceandefficiencyoftheequipment.XSRFlashmemorymanagementarchitecture,whichiswidelyusedasNANDFlashmanagementsoftwareinthecurrentmobilephoneindustry,iswidelyusedinhigh-endflagshipsmartphoneofmajorbrandsandlow-endfeatureph
6、oneofmediumandsmallbrands,anditsstability,performanceandefficiencyhavebeenmass-productiontested.Intheeraoffeaturephone,duetothesmallsoftwareprogramsizeandtheshortdownloadtime,thereisnoneedtousetheROMWriterdownloadmethodwhichisfasterIII上海交通大学工程硕士学位论文ABSTR
7、ACTandmoreefficientintheproductionlineprocess.EvenifsomeprojectsusedROMWriterdownload,theywererarelybasedontheXSRflashmanagementarchitecture.Withthegrowingsizeofthesmartphonesoftware,anddownloadtimeofthesoftwaregettinglongerandlonger,thepreviousproductio
8、nlineprocessgraduallydoesn’tapplytotherequirementsforthedevelopmentoftheindustry.Ontheotherhand,ROMWriterbecomesmoreandmorenecessarytoenhancetheefficiencyandcutthecostoftheproductionlineobviouslyontheverylargevolumeproduct
