TMS320F28x System Control and Interrupts Reference

TMS320x281xDSPSystemControlandInterruptsReferenceGuideLiteratureNumber:SPRU078EApril2002−RevisedMarch2008iiiReadThisFirstPreface
  AboutThisManualThisguidedescribeshowvarious281xdigitalsignalprocessor(DSP)systemcontrolsandinterruptsworkwithperipherals.Itincludesinformationonthe:
Flashandone-timeprogrammable(OTP)memories
Codesecuritymodule(CSM),whichisasecurityfeatureincorporatedin28xdevices
Clockingmechanismsincludingtheoscillator,PLL,thewatchdogfunction,andthelow-powermodes
GPIOMUXregistersusedtoselecttheoperationofsharedpins
Peripheralframesandthedeviceemulationregisters
Peripheralinterruptexpansion(PIE)blockthatmultiplexesnumerousinterruptsourcesintoasmallersetofinterruptinputsRelatedDocumentationFromTexasInstrumentsThefollowingbooksdescribetheTMS320x281xandrelatedsupporttoolsthatareavailableontheTIwebsite.TMS320F2810,TMS320F2811,TMS320F2812,TMS320C2810,TMS320C2811,andTMS320C2812DigitalSignalProcessors(literaturenumberSPRS174)datasheetcontainstheelectricalandtimingspecificationsforthesedevices,aswellassignaldescriptionsandpinoutsforalloftheavailablepackages.TMS320R2811andTMS320R2812DigitalSignalProcessors(literaturenumberSPRS257)datasheetcontainstheelectricalandtimingspecificationsforthesedevices,aswellassignaldescriptionsandpinoutsforalloftheavailablepackages.TMS320C28xDSPCPUandInstructionSetReferenceGuide(literaturenumberSPRU430)describesthecentralprocessingunit(CPU)andtheassemblylanguageinstructionsoftheTMS320C28xfixed-pointdigitalsignalprocessors(DSPs).ItalsodescribesemulationfeaturesavailableontheseDSPs.RelatedDocumentationFromTexasInstrumentsivTMS320x281xAnalog-to-DigitalConverter(ADC)ReferenceGuide(liter-aturenumberSPRU060)describestheADCmodule.Themoduleisa12−bitpipelinedADC.Theanalogcircuitsofthisconverter,referredtoasthecoreinthisdocument,includethefront-endanalogmultiplexers(MUXs),sample−and−hold(S/H)circuits,theconversioncore,voltageregulators,andotheranalogsupportingcircuits.Digitalcircuits,referredtoasthewrapperinthisdocument,includeprogrammableconversionsequencer,resultregisters,interfacetoanalogcircuits,interfacetode-viceperipheralbus,andinterfacetootheron-chipmodules.TMS320x281xBootROMReferenceGuide(literaturenumberSPRU095)describesthepurposeandfeaturesofthebootloader(factory-pro-grammedboot-loadingsoftware).Italsodescribesothercontentsofthedeviceon-chipbootROMandidentifieswherealloftheinformationislo-catedwithinthatmemory.TMS320x281xEventManager(EV)ReferenceGuide(literaturenumberSPRU065)describestheEVmodulesthatprovideabroadrangeoffunc-tionsandfeaturesthatareparticularlyusefulinmotioncontrolandmotorcontrolapplications.TheEVmodulesincludegeneral-purpose(GP)tim-ers,full-compare/PWMunits,captureunits,andquadrature-encoderpulse(QEP)circuits.TMS320x281xExternalInterface(XINTF)ReferenceGuide(literaturenumberSPRU067)describestheexternalinterface(XINTF)ofthe28xdigitalsignalprocessors(DSPs).TMS320x281xMulti-channelBufferedSerialPorts(McBSPs)ReferenceGuide(literaturenumberSPRU061)describestheMcBSP)availableontheC28xdevices.TheMcBSPsallowdirectinterfacebetweenaDSPandotherdevicesinasystem.TMS320x28xx,28xxxEnhancedControllerAreaNetwork(eCAN)Refer-enceGuide(literaturenumberSPRU074)describestheeCANthatusesestablishedprotocoltocommunicateseriallywithothercontrollersinelectricallynoisyenvironments.With32fullyconfigurablemailboxesandtime-stampingfeature,theeCANmoduleprovidesaversatileandrobustserialcommunicationinterface.TheeCANmoduleimplementedintheC28xDSPiscompatiblewiththeCAN2.0Bstandard(active).TMS320x28xx,28xxxPeripheralReferenceGuide(literaturenumberSPRU566)describestheperipheralreferenceguidesofthe28xdigitalsignalprocessors(DSPs).TMS320x28xx,28xxxSerialCommunicationInterface(SCI)ReferenceGuide(literaturenumberSPRU051)describestheSCIthatisatwo-wireRelatedDocumentationFromTexasInstrumentsvReadThisFirstasynchronousserialport,commonlyknownasaUART.TheSCImod-ulessupportdigitalcommunicationsbetweentheCPUandotherasyn-chronousperipheralsthatusethestandardnon-return-to-zero(NRZ)format.TMS320x28xx,280xxxSerialPeripheralInterface(SPI)ReferenceGuide(literaturenumberSPRU059)describestheSPI−ahigh-speedsynchro-nousserialinput/output(I/O)portthatallowsaserialbitstreamofpro-grammedlength(onetosixteenbits)tobeshiftedintoandoutofthede-viceataprogrammedbit-transferrate.TheSPIisusedforcommunica-tionsbetweentheDSPcontrollerandexternalperipheralsoranothercontroller.TheTMS320C28xInstructionSetSimulatorTechnicalOverview(litera-turenumberSPRU608)describesthesimulator,availablewithintheCodeComposerStudioforTMS320C2000IDE,thatsimulatesthein-structionsetoftheC28xcore.TMS320C28xDSP/BIOSApplicationProgrammingInterface(API)Refer-enceGuide(literaturenumberSPRU625)describesdevelopmentusingDSP/BIOS.3.3VDSPforDigitalMotorControlApplicationReport(literaturenum-berSPRA550)describesascenarioofa3.3-V-onlymotorcontrollerindicatingthatformostapplications,nosignificantissueofinterfacingbetween3.3Vand5Vexists.On-chip3.3-Vanalog-to-digitalconvert-er(ADC)versus5-VADCisalsodiscussed.Guidelinesforcompo-nentlayoutandprintedcircuitboard