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1、TMS320DM642Video/ImagingFixed-PointDigitalSignalProcessorwww.ti.comSPRS200J–JULY2002–REVISEDAUGUST20051TMS320DM642Video/ImagingFixed-PointDigitalSignalProcessor1.1Features·High-PerformanceDigitalMediaProcessorMemorySpace–2-,1.67-,1.39-nsInstructionCycleTime·Enhanc
2、edDirect-Memory-Access(EDMA)–500-,600-,720-MHzClockRateController(64IndependentChannels)–Eight32-BitInstructions/Cycle·10/100Mb/sEthernetMAC(EMAC)–4000,4800,5760MIPS–IEEE802.3Compliant–FullySoftware-CompatibleWithC64x™–MediaIndependentInterface(MII)·VelociTI.2™Ext
3、ensionstoVelociTI™–8IndependentTransmit(TX)ChannelsandAdvancedVery-Long-Instruction-Word(VLIW)1Receive(RX)ChannelTMS320C64x™DSPCore·ManagementDataInput/Output(MDIO)–EightHighlyIndependentFunctionalUnits·ThreeConfigurableVideoPortsWithVelociTI.2™Extensions:–Providi
4、ngaGluelessI/FtoCommonVideo·SixALUs(32-/40-Bit),EachSupportsDecoderandEncoderDevicesSingle32-Bit,Dual16-Bit,orQuad8-Bit–SupportsMultipleResolutions/VideoStdsArithmeticperClockCycle·VCXOInterpolatedControlPort(VIC)·TwoMultipliersSupportFour16x16-BitMultiplies(32-Bi
5、tResults)perClock–SupportsAudio/VideoSynchronizationCycleorEight8x8-BitMultiplies(16-Bit·Host-PortInterface(HPI)[32-/16-Bit]Results)perClockCycle·32-Bit/66-MHz,3.3-VPeripheralComponent–Load-StoreArchitectureWithNon-AlignedInterconnect(PCI)Master/SlaveInterfaceSupp
6、ortConformstoPCISpecification2.2–6432-BitGeneral-PurposeRegisters·MultichannelAudioSerialPort(McASP)–InstructionPackingReducesCodeSize–EightSerialDataPins–AllInstructionsConditional2–WideVarietyofISandSimilarBitStream·InstructionSetFeaturesFormat–Byte-Addressable(
7、8-/16-/32-/64-BitData)–IntegratedDigitalAudioI/FTransmitter–8-BitOverflowProtectionSupportsS/PDIF,IEC60958-1,AES-3,–Bit-FieldExtract,Set,ClearCP-430Formats–Normalization,Saturation,Bit-Counting·Inter-IntegratedCircuit(I2CBus™)–VelociTI.2™IncreasedOrthogonality·Two
8、MultichannelBufferedSerialPorts·L1/L2MemoryArchitecture·Three32-BitGeneral-PurposeTimers–128K-Bit(16K-Byte)L1PProgramCache·SixteenGeneral-PurposeI/O(GPI
