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ApplicationReportSPRAA91–May2006TMS320F280xDigitalSignalControllerUSBConnectivityusingtheTUSB3410USB-to-UARTBridgeChipDavidM.AlterDSPApplications–SemiconductorGroupABSTRACTUSBconnectivityontheTMS320F280xfamilyofDigitalSignalControllersmaybeachievedusingtheTUSB3410USB2.0toUARTbridgechip.AllneededUSBdescriptorsandfirmwarefortheTUSB3410devicearebootablefromtheon-chipmemoryoftheTMS320F280xdevicethroughtheI2Cport,andhenceanexternalEEPROMisnotneededinthesystem.AUSBdevelopmentsystemfortheTMS320F2808iseasilyconstructedusingreadilyavailabledevelopmentkitsfortheTMS320F2808andTUSB34310.Hardwareconnectionsaswellassoftwarepreparationandoperationofthedevelopmentsystemusingasimplecommunicationechoprogramarepresentedinthisapplicationreport.TMS320isatrademarkofTexasInstrumentsIncorporatedAlltrademarksarethepropertyoftheirrespectiveowners.SPRAA912TMS320F280xDigitalSignalControllerUSBConnectivityusingtheTUSB3410USB-to-UARTBridgeChipContents1Introduction.....................................................................................................................................32USBDesignDecisionswiththeTUSB3410..................................................................................42.1VIDandPIDValuesandStorageLocation...............................................................................42.2FirmwareStorageLocation.......................................................................................................52.3HostDriver................................................................................................................................52.4DeviceSerialization...................................................................................................................53TMS320F280xtoTUSB3410HardwareInterface..........................................................................64DevelopmentSystemDescription.................................................................................................75Software...................