avr教程 avr introduction

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1、IntroductionAtmelMCUTraining-ASIA2004December2004ThebeginningAVRstartedasastudentproject/diplomathesisatNTNU(UniversityofTrondheim)In91/92thestudentsAlf-EgilBogenandVegardWollanstartedtheirideaofdesigning“aperfectRISCprocessor”Theresultswhereaprocessor;withassemblerandsimulator.Theyna

2、meditµRISCanditwasusedinseveralASICsbyalocalASICcompany.Butin1995thetimewasrighttomarketitasadedicatedproduct...2AtmelCorporationAtmelCorporationwaschoicenaspartner;duetothattheywhere,andstillare,theworldsleadingvendorofFLASHandEEPROMmemories.WhatcouldAtmelofferµRISC?TechnologyµRISCc

3、ouldbecomeoneofthefirstmicrocontrollerswithFlashprogrammemoryThecompetitorsprogrammemorywheremainlyEPROMorROMSemiconductorfabsAtmelhadtheirownfabsBettercontrolonproductionandtechnologyEstablishedsalesforceAtmelwasestablishedin1984andhadin1995awellfoundedworldwidesalesforce.MoneyItisexp

4、ensivetodevelopnewproducts...3µRISCchangesnametoAVRBogenandWollanmakesadealwithAtmelonfurtherdevelopmentandsalesoftheµRISCExtensivedevelopmentisputintotheµRISCandtheychangethenametoAVRTheagreementstargetistoestablishayearlyrevenueofAVRproductsof$100milwithin5yearsAsapartoftheagreementt

5、heyestablishAtmelNorwayAtmelNorwaygetsthemainresponsibilitytodevelopandmarkettheAVRmicrocontrollersThefirstAVRisreleasedin1997AT90S1200Theirgoalof$100milisachievedin20024AVRHistoricalRoadmap200019972004/2005FPGAAVRMEGAAVRTINYAVRAVRAVRFPGAAVRMEGAAVRRFAVRSECUREAVRAVRUSBAVRTINYAVRLCDAVR

6、CANAVRASICAVR5AVRMicrocontrollerShipments+181%+122%+180%+58%+49%+22%+24%6TheAVRProductFamilyFamilyrangesfrom1Kto256KdevicesAlldevicesbasedonsameAVRarchitectureAllwithFLASHprogrammemoryOnesetofdevelopmenttoolsReducestoolscostOnlyoneuserinterfacetolearnCodecanbereusedonalldevices!7TheWo

7、rld’sLeading8-bitArchitectureRISCarchitecturewithCISCinstructionsetEasytolearnandpowerfulinstructionsetforCandAssemblySinglecycleexecutionOneinstructionperexternalclockLowpowerconsumption32WorkingRegistersAllregistersaredirectlyconnectedtoALUHarvardArchitectureSimultaneous,fastacces