标签: vectored

【应用手册】AN595:VectoredInterruptControllerUsageandApplicationsTheabilitytoprocessinterrupteventsquicklyandtohandlelargenumbersofinterruptscanbecriticaltomanyembeddedsystems.TheVectoredInterruptController(VIC)isdesignedtoaddresstheserequirements.TheVICcanprovideinterruptperformancefourtofivetimesbetterthantheNios®IIprocessor’sdefaultinternalinterruptcontroller(IIC).TheVICalsoallowsexpansiontoavirtuallyunlimitednumberofinterrupts,throughdaisychaining.ThisdocumentexplainshowtousetheVICinyourhardwaredesign,frombothahardwareperspectiveandasoftwareperspective.Thisdocumentincludesthefollowingsections:■“OverviewofVICHardware”onpage1■“ReasonstoUsetheVIC”onpage2■“ImplementingtheVICinSOPCBuilder”onpage2■“ExampleDesigns”onpage9■“AdvancedTopics”onpage12■“Conclusion”onpage20AN595:VectoredInterruptControllerUsageandApplicationsNovember2009AN-595-1.0Theabilitytoprocessinterrupteventsquicklyandtohandlelargenumbersofinterruptscanbecriticaltomanyembeddedsystems.TheVectoredInterruptController(VIC)isdesignedtoaddresstheserequirements.TheVICcanprovideinterruptperformancefourtofivetimesbetterthantheNiosIIprocessor’sdefaultinternalinterruptcontroller(IIC).TheVICal……