利用双口RAM实现DSP与上位机的数据交换

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20107SCIENCE&TECHNOLOGYINFORMATION0,DSPTITMS320VC5402(C5402),,,、。,C5402。C5402。RAMIDT70261,C5402。1DSPRAMC5402(HPI),[1],。RAMDSP,。C5402,10ns(100MIPS),3.3V,RAM[2]。IDT7026116K×16bitRAM,;15ns;M/S32;Busy;;5V[3]。IDT70261:3FFFH,INTR,,;3FFEH,INTL,,。IDT70261,DSP。IDT70261INTRC5402;IDT70261INTL。RAM,,3FFFH,INTR,C5402,C5402。C5402,3FFEH,,。IDT70261DSP、,IDT702613FFEH、3FFFH“”。21C5402IDT70261,。2.1C54023.3V,IDT702615V,DSPRAM。,C54023.3V5V,IDT702615V3.3VC5402。1C5402IDT70261TI74LVC16245A16。3.3V,5V3.3V,(DIR)。,DSP5V。2.2C5402IDT702612C5402DSP,(),DSP,。2C5402。C5402,。C5402,,C540220ns。C5402:、,60%,12ns。3IDT70261,15ns,RAMDSP12(1.91550116023;2.266041)【】TMS320VC5402IDT70261,DSP,。【】DSP;RAM;TheDataExchangeBetweenDSPandUpperComputerUsingtheDual-portRAMZOUWeiGAOWei-liang【Abstract】BasedonthecharacteristicsofTMS320VC5402andIDT70261,thewayofdataexchangeisproducedbetweenDSPandUpperComputer.Theinterfacedesignschemeisgivenandthekeytechniqueofrealizingatengineerisanalyzed.【Keywords】DSP;Dual-portRAM;DataExchange;Interface○○79SCIENCE&TECHNOLOGYINFORMATION20107。C5402(SWWSR),。SWWSR0028h,,::LowProg:0000~7FFFh;HiProg:8000~FFFFh;LowData:0000~7FFFh;HiData:8000~FFFFh;I/O:0000~FFFFhI/O。(SWCR),50~14。IDT702612,DSPRAM,C5402ReadyRAM。2.3RAM,IDT70261Busy。Busy,。,C5402Ready。Ready。(Ready),,Ready。,,Ready。IDT702612。IDT70261BusyC5402Ready,,RAM。3C5402。,,。【】[1],.TMS320C54xDSP、.:,2001,11.[2].TMS320C54XDSP[M].:,2002:348-351.[3]IntegratedDeviceTechnology,Inc.High-Speed16K×16Dual-PortStaticRAMwithInterrupt.2000.[:]3IDT70261●(146),,。,。,,,。,,“”,“”、“”“”,、、。3.3,、、、,、。,、,,。,,。“”,,、、,。3.4“”,,,。,,。,,。、。3.5,。,。4,。“”“”,,。【】[1].[J].,2008(4):23-29.[2].[J].,2009(3):14-18.[3],,.[J].,2009(1):17-19.[4],.[J].,2009(3):65-66.:(1969—),,。(1977—),,,。[:]●(139);:、、、。【】[1].[M].:,2003,8.[2],.[J].,2003,6.[3],,.[J].,2003,3.[4].[J].,2004,3.[5],,.[J].,2004,6.[6],,.[J].,2004,3.[:]●○○●●80

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