Motorola 68HC11微控制器接口Microchip的串行EEPROM

Therearemanydifferentmicrocontrollersonthemarket

todaythatarebeingusedinembeddedcontrol

applications.Manyoftheseembeddedcontrolsystems

neednon-volatilememory.Becauseoftheirsmall

footprint,bytelevelflexibility,lowI/Opinrequirement,

lowpowerconsumptionandlowcost,SerialEEPROMs

areapopularchoicefornon-volatilestorage.

MicrochipTechnologyIncorporatedaddressesthisneed

byofferingafulllineofSerialEEPROMscovering

industrystandardserialcommunicationprotocolsfor

2-wireand3-wirecommunication.Thetheory,operation

anddifferencesofthesetwoprotocolsarediscussedin

detailinMicrochip’sapplicationnoteAN536.Thereader

shouldrefertoAN536ifunfamiliarwith2-wireand/or

3-wirecommunicationprotocols.SerialEEPROM

devicesareavailableinavarietyofdensities,

operationalvoltagerangesandpackagingoptions.AN609InterfacingMicrochipSerialEEPROMstoMotorola68HC11MicrocontrollerForMicrochip2-wiredevices(24CXXA,24LCXX,Author:KeithPazul24LCXXB,24AAXXdevices,excluding24XX32andMemoryandASSPDivision24XX65devices),therearethreeprogramstoperformsomeofthebasiccommunicationfunctions.SRDMT2W.ASM-2-WireSequentialReadINTRODUCTION