苹果桌面总线（ADB）

Thepurposeofthisapplicationnoteistointroducea

PIC16CXXXbasedADBinterfacewhichcanbeused

asabasisforthedevelopmentofcustomADBdevices.

Thisapplicationnotedescribes;thehardwareinvolved,

ageneralpurposeADBprotocolhandler,andan

exampleapplicationtask.Theexamplesoftware

applicationsupportsasinglekeykeyboardtothe

Macintosh

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MAppleDesktopBus(ADB)AN591EXPLANATIONOFADBAuthor:RobMcCallTECHNOLOGYWFTElectronicsSupport:GusCalabreseADBisanasynchronouspulse-widthcommunicationDaveEvinkprotocolsupportingalimitednumberofdevices.AllCurtAppersondevicesshareasingleI/Owireinamulti-dropmas-WFTElectronics