PIC18F8XXX外部存储器接口技术

ThePIC18FXXXXfamilyoffersthelargestrangeof

on-chipenhancedFLASHprogrammemoryandthe

richestselectionofperipheralsinthecurrentlineof

Microchipmicrocontrollers.ThePIC18F8XXXsubsetis

madeupof80-pinpartsthatfurtherextendthecapabil-

itiesbyprovidingaccesstoexternalmemorydevices.

Throughtheadditionofexternalmemorydevices,an

8-bitapplicationhasthepowertoutilizeunprecedented

amountsofcodeordata;upto2Mbytesforan8-bit

microcontroller!AN869ExternalMemoryInterfacingTechniquesforthePIC18F8XXXThisapplicationnotecontainsthefollowingmainAuthor:TimRovnaksections:MicrochipTechnologyInc.ExternalMemoryInterface(EMI)OverviewDescribestheOperatingmodes,pinimplementation,INTRODUCTIONregisters,andcontrolbitsthatdeterminetheThePIC18FXXXXfamilyoffersthelargestrangeof