标签: 外部存储器

基于外部存储器加载模式的DSP启动信号研究与应用

拥有48M字节外部存储器的Nexys3_FPGA开发板..zip

基于外部存储器加载模式的DSP启动信号研究与应用.

1概述RTX51TINY是一种应用于MCS5l系列单片机的小型多任务实时操作系统.它完全集成在KeilC5l编译器中,具有运行速度快、对硬件要求不高、使用方便灵活等优点,因此越来越广泛地应用到单片机的软件开发中.它可以在单个CPU上管理几个作业(任务),同时可以在没有扩展外部存储器的单片机系统上运行.……

Altera设计了外部存储器解决方案的所有组件使其协调工作，实现当今应用所需要的高性能、高效产品。解决方案的所有组件都能够协调工作，使Altera®FPGA满足了所有应用要求的高性能标准。采用外部存储器解决方案提高系统性能WP-01134-1.0白皮书Altera设计了外部存储器解决方案的所有组件使其协调工作，实现当今应用所需要的高性能、高效产品。解决方案的所有组件都能够协调工作，使AlteraFPGA满足了所有应用要求的高性能标准。引言AlteraFPGA70%以上的设计都需要某些类型的外部存储器，但不同的应用会有不同的需求。本白皮书详细介绍了采用AlteraFPGA构建外部存储器解决方案，包括应用需求、AlteraFPGA的存储器功能以及器件和知识产权(IP)选择等。还讨论了构成AlteraPHY的模块化存储器组件，对电路进行的改进，以及电路校准功能，具有高级块管理等新特性的控制器新产品等。此外，Altera还提供了高质量的测试、工具、设计……

ThePIC17CXXXdeviceshavethecapabilitytointer-faceexternalFLASHmemoryintothe64Kx16pro-grammemoryspace.Coupledwiththisfeatureistheabilitytoreadandwritetotheentireprogrammemoryofthedevice.Usingoneofthestandardserialinter-facesonthePICmicro(USART,SPI,I2C™),acom-pletehexfilecanbedownloadedintotheexternalFLASHmemorybyabootloaderprogram.ThePIC17CXXXfamilyconsistsofsevendevicesasshownMDownloadingHEXFilestoExternalFLASHMemoryTB024UsingPIC17CXXXPICmicroMicrocontrollersAuthor:RodgerRicheyMicrochipTechnologyInc.INTRODUCTIONThePIC17CXXXdeviceshavethecapabilitytointer-faceexternalFLASHmemoryintothe64Kx16pro-grammemoryspace.Coupledwiththisfeatureistheabilitytoreadandwritetotheentireprogrammemoryofthedevice.Usingoneofthestandardserialinter-facesonthePICmicro(USART,SPI,I2C),acom-pletehexlecanbedownloadedintotheexternalFLASHmemorybyabootloaderprogram.ThePIC17CXXXfamilyconsistsofsevendevicesasshowninTable1TABLE1……

ThisTechnicalBriefshowshowtoconnectaPIC17CXXdevicetoexternalmemory.ItalsoprovidesinstructionsandcalculationstohelpdeterminewhichspeedsofSRAMworkwithwhichfrequencycrystalTB005UsingExternalRAMwithPIC17CXXDevicesTABLE1:INTERNAL/EXTERNALMEMORYAuthor:RodgerRicheyAdvancedMicrocontrollerAddressDeviceSize(Words)andTechnologyDivisionRange20480x0000-Inte……

ThisapplicationnotedescribesthemethodologytousetheParallelMasterPort(PMP)moduletointerfacewithexternaldatamemory;eitherexternalFlashorexternalRAM.ThisapplicationnotealsoliststheAPIsanddescribeshowtoimplementdifferenttypesofinterfaces.UsingthePMPmodule,thememorydeviceswith64Klocations(KbytesorKwords)canbeinterfacedwithnoextraI/Osandsoftware.Thisapplicationnotedescribeshowtointerfacethememorydeviceswithmorethan64KlocationsusingsomeI/OpinsandprovidestherequiredAPIs.Thisapplicationnotedescribesthefollowingtopics:•“ExternalDataMemoryInterfaceOverview”•“FunctionalImplementation”•“ExpansionOfExternalMemory”•“ReferenceCode”AN1210UsingExternalDataMemorywithPIC24F/24H/dsPIC33FDevicesAuthor:VidyadharVivekanandaSignalsRequiredforInterfacingMemoryMicrochipTechnologyInc.DevicesTable1providesthesignalsrequiredtointerfaceINTRODUCTIONdifferenttypesofmemorydevices.ThisapplicationnotedescribesthemethodologytousetheParallelMasterPort(PMP)moduletointerfacewithTABLE1:TYPICALMEMORYDEVICEexternaldatamemory;eitherexternalFlashorexternalINTE……

ThePIC18FXXXXfamilyoffersthelargestrangeofon-chipenhancedFLASHprogrammemoryandtherichestselectionofperipheralsinthecurrentlineofMicrochipmicrocontrollers.ThePIC18F8XXXsubsetismadeupof80-pinpartsthatfurtherextendthecapabil-itiesbyprovidingaccesstoexternalmemorydevices.Throughtheadditionofexternalmemorydevices,an8-bitapplicationhasthepowertoutilizeunprecedentedamountsofcodeordata;upto2Mbytesforan8-bitmicrocontroller!AN869ExternalMemoryInterfacingTechniquesforthePIC18F8XXXThisapplicationnotecontainsthefollowingmainAuthor:TimRovnaksections:MicrochipTechnologyInc.ExternalMemoryInterface(EMI)OverviewDescribestheOperatingmodes,pinimplementation,INTRODUCTIONregisters,andcontrolbitsthatdeterminetheThePIC18FXXXXfamilyoffersthelargestrangeof……

ThePIC18C601andPIC18C801aretheveryfirstmembersofMicrochip’sPIC18familythatareROM-lessmicrocontrollers—thatis,theyhavenoon-chipprogrammemory.BothoffertheenhancedPIC18architecture,alongwiththeabilitytousedifferenttypesandsizesofexternalprogrammemorytoexactlyfitanyapplication.Inadditiontostandard1.5Kbytesofgen-eralpurposeRAM,thePIC18C601canaddressupto256Kbytesofexternalprogrammemory,whilethePIC18C801canaddressupto2Mbytesofexternalprogrammemory.Withthisamountofavailableaddressablespace,thePIC18C601/801devicesbecomeidealcandidatesformorecomplexapplica-tions(e.g.TCP/IPstacks),developedwithhighlevelprogramminglanguages,suchas‘C’.AN778ImplementingtheExternalMemoryInterfaceonPIC18C601/801MCUsGiventhenumberandtypesofmemoriesavailableAuthor:GaurangKavaiyatoday,findingandinterfacingmemorytotheMicrochipTechnologyInc.PIC18C601/801devicespotentiallybecomesachal-lengingtask.ThisapplicationnotedescribesthePIC18C601/801externalmemory……