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Preface
SPRUEP9A–May2008
ReadThisFirst
AboutThisManual
ThisdocumentdescribestheARMsubsystemintheTMS320DM646xDigitalMediaSystem-on-Chip
(DMSoC).
NotationalConventions
Thisdocumentusesthefollowingconventions.
•Hexadecimalnumbersareshownwiththesuffixh.Forexample,thefollowingnumberis40
hexadecimal(decimal64):40h.
•Registersinthisdocumentareshowninfiguresanddescribedintables.
–Eachregisterfigureshowsarectangledividedintofieldsthatrepresentthefieldsoftheregister.
Eachfieldislabeledwithitsbitname,itsbeginningandendingbitnumbersabove,andits
read/writepropertiesbelow.Alegendexplainsthenotationusedfortheproperties.
–Reservedbitsinaregisterfiguredesignateabitthatisusedforfuturedeviceexpansion.
RelatedDocumentationFromTexasInstruments
ThefollowingdocumentsdescribetheTMS320DM646xDigitalMediaSystem-on-Chip(DMSoC).Copies
ofthesedocumentsareavailableontheInternetatwww.ti.com.Tip:Entertheliteraturenumberinthe
searchboxprovidedatwww.ti.com.
ThecurrentdocumentationthatdescribestheDM646xDMSoC,relatedperipherals,andothertechnical
collateral,isavailableintheC6000DSPproductfolderat:www.ti.com/c6000.
SPRUEP8—TMS320DM646xDMSoCDSPSubsystemReferenceGuide.Describesthedigitalsignal
processor(DSP)subsystemintheTMS320DM646xDigitalMediaSystem-on-Chip(DMSoC).
SPRUEQ0—TMS320DM646xDMSoCPeripheralsOverviewReferenceGuide.Providesanoverview
andbrieflydescribestheperipheralsavailableontheTMS320DM646xDigitalMedia
System-on-Chip(DMSoC).
SPRAA84—TMS320C64xtoTMS320C64x+CPUMigrationGuide.Describesmigratingfromthe
TexasInstrumentsTMS320C64xdigitalsignalprocessor(DSP)totheTMS320C64x+DSP.The
objectiveofthisdocumentistoindicatedifferencesbetweenthetwocores.Functionalityinthe
devicesthatisidenticalisnotincluded.
SPRU732—TMS320C64x/C64x+DSPCPUandInstructionSetReferenceGuide.DescribestheCPU
architecture,pipeline,instructionset,andinterruptsfortheTMS320C64xandTMS320C64x+digital
signalprocessors(DSPs)oftheTMS320C6000DSPfamily.TheC64x/C64x+DSPgeneration
comprisesfixed-pointdevicesintheC6000DSPplatform.TheC64x+DSPisanenhancementof
theC64xDSPwithaddedfunctionalityandanexpandedinstructionset.
SPRU871—TMS320C64x+DSPMegamoduleReferenceGuide.DescribestheTMS320C64x+digital
signalprocessor(DSP)megamodule.Includedisadiscussionontheinternaldirectmemoryaccess
(IDMA)controller,theinterruptcontroller,thepower-downcontroller,memoryprotection,bandwidth
management,andthememoryandcache.
SPRU656—TMS320C6000DSPCacheUser'sGuide.Explainsthefundamentalsofmemorycaches
anddescribeshowthetwo-levelcache-basedinternalmemoryarchitectureinthe
TMS320C621x/C671x/C64xdigitalsignalprocessors(DSPs)oftheTMS320C6000DSPfamilycan
beefficientlyusedinDSPapplications.Showshowtomaintaincoherencewithexternalmemory,
howtouseDMAtoreducememorylatencies,andhowtooptimizeyourcodetoimprovecache
SPRUEP9A–May2008ReadThisFirst11
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