PIC24F24HdsPIC33F设备外部数据存储器使用

Thisapplicationnotedescribesthemethodologytouse

theParallelMasterPort(PMP)moduletointerfacewith

externaldatamemory;eitherexternalFlashorexternal

RAM.ThisapplicationnotealsoliststheAPIsand

describeshowtoimplementdifferenttypesof

interfaces.

UsingthePMPmodule,thememorydeviceswith

64Klocations(KbytesorKwords)canbeinterfaced

withnoextraI/Osandsoftware.Thisapplicationnote

describeshowtointerfacethememorydeviceswith

morethan64KlocationsusingsomeI/Opinsand

providestherequiredAPIs.

Thisapplicationnotedescribesthefollowingtopics:

•“ExternalDataMemoryInterfaceOverview”

•“FunctionalImplementation”

•“ExpansionOfExternalMemory”

•“ReferenceCode”AN1210UsingExternalDataMemorywithPIC24F/24H/dsPIC33FDevicesAuthor:VidyadharVivekanandaSignalsRequiredforInterfacingMemoryMicrochipTechnologyInc.DevicesTable1providesthesignalsrequiredtointerfaceINTRODUCTIONdifferenttypesofmemorydevices.ThisapplicationnotedescribesthemethodologytousetheParallelMasterPort(PMP)moduletointerfacewithTABLE1:TYPICALMEMORYDEVICEexternaldatamemory;eitherexternalFlashorexternalINTE