标签: 闪存应用

Manytimes,choosingaFLASHmemorydeviceisdrivenbywhichmanufacturerhasthecheapestoffer-ing.Regardlessofitsuseasastand-alonedeviceorastheprogrammemoryofamicrocontroller,whatisoftenoverlookedarethemanykeydesignparameters,orthefeaturesthatthememorymayoffertotheapplication.Endurance,dataretention,temperature,operatingvolt-ageandfrequency,andprogrammingtimeallplaysig-nificantrolesinthereliabilityofthedevice.Selectionsbasedoncostalonemaybepenny-wisebutdollar-foolish;theapplicationmaybethecheapestonthemarketbutitsoverallqualitycannegativelyimpactthecustomer’sperceptionandtherefore,theirfuturepur-chases.Carefullybalancingthesefactorscanmakethedifferencebetweenanapplicationthat’salongtermsuperstaroraonehitwonder.ThistechnicalbriefwillreviewthebasicoperationofNon-VolatileMemory(NVM)cellsandthekeyfactorsofmemoryperformancethatshouldbeconsideredinthedecisionmakingprocess.WewillusethesefactorstoshowwhyMicrochip’sFLASHtechnologyissuchastrongcontenderintheworldofembeddedcontroldesign.TB072FLASHMemoryTechnology:ConsiderationsforApplicationDesignAuthor:RodgerRicheyProgramanderaseoperationsareprimarilyaccom-plishedbytwomethods.ProgrammingcanuseeitherMicrochipTechnologyInc.ChannelHotElectrons(CHE)orFowler-Nordheimtun-neling(FN).EraseoperationscanuseeitherFNtunnel-INTRODUCTIONingorEmission.CHEusesacombin……