04 Program Memory.pdf

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1、Section4.ProgramMemoryHIGHLIGHTSThissectionofthemanualcontainsthefollowingtopics:4.1ProgramMemoryAddressMap.....................................................................................4-24.2ProgramCounter.............................................

2、..............................................................4-44.3DataAccessfromProgramMemory..............................................................................4-44.4ProgramSpaceVisibilityfromDataSpace...........................................

3、.........................4-74.5ProgramMemoryWrites..............................................................................................4-104.6TableInstructionOperation.................................................................................

4、.........4-104.7FlashProgrammingOperations...................................................................................4-164.8RegisterMaps..............................................................................................................4-1

5、94.9RelatedApplicationNotes............................................................................................4-204.10RevisionHistory...........................................................................................................4-214Mem

6、oryProgram©2007MicrochipTechnologyInc.AdvanceInformationDS39715A-page4-1PIC24FFamilyReferenceManual4.1PROGRAMMEMORYADDRESSMAPThePIC24Fdevicescanhaveupto4Mx24-bitprogrammemoryaddressspace,asshowninFigure4-2.Therearethreemethodsforaccessingprogramspace.1.Viat

7、he23-bitPC.2.Viatableread(TBLRD)andtablewrite(TBLWT)instructions.3.Bymappingany32-Kbytesegmentofprogrammemoryintothedatamemoryaddressspace.Theprogrammemorymapisdividedintotheuserprogramspaceandtheconfigurationspace.Theuserprogramspace(000000hto7FFFFFh)conta

8、instheResetvector,interruptvectortablesandprogrammemory.DeviceConfigurationregistersandDeviceIDsectionsaremappedincon-figurationspace.ConfigurationbitsandDeviceIDscanbereadfromtheselocations;however,th