ENC28J60_网卡芯片应用电路,中文资料

©2006MicrochipTechnologyInc.PreliminaryDS39662BENC28J60DataSheetStand-AloneEthernetControllerwithSPIInterfaceDS39662B-pageiiPreliminary©2006MicrochipTechnologyInc.Informationcontainedinthispublicationregardingdeviceapplicationsandthelikeisprovidedonlyforyourconvenienceandmaybesupersededbyupdates.Itisyourresponsibilitytoensurethatyourapplicationmeetswithyourspecifications.MICROCHIPMAKESNOREPRESENTATIONSORWARRANTIESOFANYKINDWHETHEREXPRESSORIMPLIED,WRITTENORORAL,STATUTORYOROTHERWISE,RELATEDTOTHEINFORMATION,INCLUDINGBUTNOTLIMITEDTOITSCONDITION,QUALITY,PERFORMANCE,MERCHANTABILITYORFITNESSFORPURPOSE.Microchipdisclaimsallliabilityarisingfromthisinformationanditsuse.UseofMicrochipdevicesinlifesupportand/orsafetyapplicationsisentirelyatthebuyer’srisk,andthebuyeragreestodefend,indemnifyandholdharmlessMicrochipfromanyandalldamages,claims,suits,orexpensesresultingfromsuchuse.Nolicensesareconveyed,implicitlyorotherwise,underanyMicrochipintellectualpropertyrights.TrademarksTheMicrochipnameandlogo,theMicrochiplogo,Accuron,dsPIC,KEELOQ,microID,MPLAB,PIC,PICmicro,PICSTART,PROMATE,PowerSmart,rfPICandSmartShuntareregisteredtrademarksofMicrochipTechnologyIncorporatedintheU.S.A.andothercountries.AmpLab,FilterLab,MigratableMemory,MXDEV,MXLAB,SEEVAL,SmartSensorandTheEmbeddedControlSolutionsCompanyareregisteredtrademarksofMicrochipTechnologyIncorporatedintheU.S.A.Analog-for-the-DigitalAge,ApplicationMaestro,CodeGuard,dsPICDEM,dsPICDEM.net,dsPICworks,ECAN,ECONOMONITOR,FanSense,FlexROM,fuzzyLAB,In-CircuitSerialProgramming,ICSP,ICEPIC,LinearActiveThermistor,Mindi,MiWi,MPASM,MPLIB,MPLINK,PICkit,PICDEM,PICDEM.net,PICLAB,PICtail,PowerCal,PowerInfo,PowerMate,PowerTool,REALICE,rfLAB,rfPICDEM,SelectMode,SmartSerial,SmartTel,TotalEndurance,UNI/O,WiperLockandZENAaretrademarksofMicrochipTechnologyIncorporatedintheU.S.A.andothercountries.SQTPisaservicemarkofMicrochipTechnologyIncorporatedintheU.S.A.Allothertrademarksmentionedhereinarepropertyoftheirrespectivecompanies.©2006,MicrochipTechnologyIncorporated,PrintedintheU.S.A.,AllRightsReserved.Printedonrecycledpaper.NotethefollowingdetailsofthecodeprotectionfeatureonMicrochipdevices:�MicrochipproductsmeetthespecificationcontainedintheirparticularMicrochipDataSheet.�Microchipbelievesthatitsfamilyofproductsisoneofthemostsecurefamiliesofitskindonthemarkettoday,whenusedintheintendedmannerandundernormalconditions.�Therearedishonestandpossiblyillegalmethodsusedtobreachthecodeprotectionfeature.Allofthesemethods,toourknowledge,requireusingtheMicrochipproductsinamanneroutsidetheoperatingspecificationscontainedinMicrochip’sDataSheets.Mostlikely,thepersondoingsoisengagedintheftofintellectualproperty.�Microchipiswillingtoworkwiththecustomerwhoisconcernedabouttheintegrityoftheircode.�NeitherMicrochipnoranyothersemiconductormanufacturercanguaranteethesecurityoftheircode.Codeprotectiondoesnotmeanthatweareguaranteeingtheproductas“unbreakable.”Codeprotectionisconstantlyevolving.WeatMicrochiparecommittedtocontinuouslyimprovingthecodeprotectionfeaturesofourproducts.AttemptstobreakMicrochip’scodeprotectionfeaturemaybeaviolationoftheDigitalMillenniumCopyrightAct.Ifsuchactsallowunauthorizedaccesstoyoursoftwareorothercopyrightedwork,youmayhavearighttosueforreliefunderthatAct.MicrochipreceivedISO/TS-16949:2002certificationforitsworldwideheadquarters,designandwaferfabricationfacilitiesinChandlerandTempe,Arizona,Gresham,OregonandMountainView,California.TheCompany’squalitysystemprocessesandproceduresareforitsPICmicro®8-bitMCUs,KEELOQ®codehoppingdevices,SerialEEPROMs,microperipherals,nonvolatilememoryandanalogproducts.Inaddition,Microchip’squalitysystemforthedesignandmanufactureofdevelopmentsystemsisISO9001:2000certified.©2006MicrochipTechnologyInc.PreliminaryDS39662B-page1ENC28J60EthernetControllerFeatures�IEEE802.3compatibleEthernetcontroller�IntegratedMACand10BASE-TPHY�Supportsone10BASE-Tportwithautomaticpolaritydetectionandcorrection�SupportsFullandHalf-Duplexmodes�Programmableautomaticretransmitoncollision�ProgrammablepaddingandCRCgeneration�Programmableautomaticrejectionoferroneouspackets�SPIInterfacewithclockspeedsupto20MHzBuffer�8-Kbytetransmit/receivepacketdualportSRAM�Configurabletransmit/receivebuffersize�Hardware-managedcircularreceiveFIFO�Byte-widerandomandsequentialaccesswithauto-increment�InternalDMAforfastdatamovement�Hardwareassistedchecksumcalculationforvari-ousnetworkprotocolsMediumAccessController(MAC)Features�SupportsUnicast,MulticastandBroadcastpackets�Programmablereceivepacketfilteringandwake-uphostonlogicalANDorORofthefollowing:-Unicastdestinationaddress-Multicastaddress-Broadcastaddress-MagicPacket™-Groupdestinationaddressesasdefinedby64-bithashtable-Programmablepatternmatchingofupto64bytesatuser-definedoffsetPhysicalLayer(PHY)Features�Loopbackmode�TwoprogrammableLEDoutputsforLINK,TX,RX,collisionandfull/half-duplexstatusOperational�Sixinterruptsourcesandoneinterruptoutputpin�25MHzclockinputrequirement�Clockoutpinwithprogrammableprescaler�Operatingvoltageof3.1Vto3.6V(3.3Vtypical)�5Vtolerantinputs�Te