平板、智能手机应用处理器的演进_ARM-Cortex.pdf

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1、ApplicationsProcessorsJuly2012ApplicationsProcessors•Fastgrowingmarket•Cellularphonemarketshiftfrommultipleprice/functionbandstostrongemphasisonsmart-and‘super’phones•Introductionoftablets,anddisplacementoflaptopcomputersespeciallyforhome/consumeruse•Criticalparametersare•Computingperfor

2、mance(clockspeed,corearchitectureandnumber)•Powerconsumption(translatestobatterylifeofendproduct)•Andmorerecently,graphicsperformance2Technology•Typicallyusingleading-edgelogicprocesses(45/32/28nm)•PrimarilybasedonARM’sCortex-A9processorcores,expectedtomovetoARM’sCortex-A15thisyear•Dualc

3、orehasbecomethenorm•Quadcoreversionshittingthemarketinthelast6monnths•Multiplepackagingmethodologies•OftenseenPackage-on-Package(PoP)withassociatedLow-PowerDDRDRAM(smallerfootprint)•QualcommusingPackage-in-Packageforsomeprocessors,potentiallyreducingheightofpackage•Sometimesseenstand-alo

4、newithseparateDRAM,especiallyintablets3Otherconsiderations•Memoryinterface/speedofmemoryaccesscriticaltooverallsystemperformance•AllmajorsystemscurrentlyusingLPDDR2DRAM•ExpecttostartseeingmigrationtoLPDDR3in2013•Qualcommincorporatescellularbasebandfunctionality(reduceschipsetrequirement)

5、–othervendorshaveapplications-onlyprocessors•OverallsystemperformancehighlydependentonO/S,withhighlyoptimizediOSandAndroidprovidingastrongeruserexperiencethatalessestablishedO/Sonthesamehardware4Majorplayer-Apple•DedicatedforAppleproducts(iPod,iPhone,iPad,andnowAppleTV)•Appsprocessorsori

6、ginallyco-developedwithSamsung•Nowdesignedindependently,with5thgenerationofapplicationsprocessor•Actuallygeneration5.1withtheA5XiniPadgen3and32nmversionofA5innewerAppleTVs•FabricatedbySamsungfoundryservices,thoughrumoursareamigrationtoTSMCisintheworks5Majorplayer-nVidia•Notlinkedtospecif

7、icOEM,nVidiaTegraapplicationsprocessorsfoundinAndroiddevicesacrossthemarket•Leveragingtheirgraphicsexpertise,nVidiapromotestheirhighperformancegraphicscapabilitiesontopofusingthetraditionalARMCortex-A9architecture•Nowin3rdgeneration(Tegra3)withfourCortex-A9cores•Fabricate