I2C 总线协议简介 毕业论文外文文献翻译.doc

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1、翻译THEINTRODUCEOF12C-BUSPROTOCOL1xTHE12C-BUSSPECIFICATIONHerearesomeofthefeaturesofthel2C-bus:■On丨ytwobusIinesarerequired;AseriaIdataIine(SDA)andaseriaIcIockIine(SCL).■EachdeviceconnectedtothebusissoftwareaddressabIebyauniqueaddressandsimplemaster/slavereIationshipsexist毗aI

2、Itimes;Masterscanoperateasmaster-transmittersorasmaster-receivers・■It，satruemulti-masterbusincludingcoIIisiondetectionandarbitrationtopreventdatacorruptioniftwoormoremasterssimuItaneousIyinitiatedatatransfer・■Seria1,8~bitoriented,bi~directionaldatatransferscanbemadeatupto1

3、00kbit/sintheStandard-mode?upto400kbit/sintheFast-mode,orupto3.4Mbit/sintheHigh-speedmode・■On-chipfiIteringrejectsspikesonthebusdata丨inetopreservedataintegrity■ThenumberofICsthatcanbeconnectedtothesamebusisIimitedonlybyamaximumbuscapacitanceof400pF.2、INTRODUCTIONTOTHE12C-B

4、USSPECIFICATIONFor8~bitorienteddigitaIcontroIappIications,suchasthoserequiringmicrocontroIIers,certaindesigncriteriacanbeestabIished:•AcompIetesystemusuaIIyconsistsofatleastonemicrocontrollerandotherperipheraIdevicessuchasmemoriesandI/Oexpanders■Thecostofconnectingthevario

5、usdeviceswithinthesystemmustbeminimized■Asystemthatperformsacontrolfunctiondoesrftrequirehigh-speeddatatransfer■OveraIIefficiencydependsonthedeviceschosenandthenatureoftheintereonnectingbusstructure・ToproduceasystemtosatisfythesecriteriafaseriaIbusstruetureisneeded.Althoug

6、hseriaIbusesdon'thavethethroughputcapabiIityofparaIIeIbuses,theydorequireIesswiringandfewerICconnectingpins.However,abusisnotmereIyaniritereorinectingwire,itembodiesaIItheformatsandproceduresforcommunicationwithinthesystem.DevicescommunicatingwitheachotheronaseriaIbusmusth

7、avesomeformofprotocoI,whichavoidsaIIpossibi丨itiesofconfusion,dataIossandbIockageofinformation.FastdevicesmustbeabIetocommunicatewithsIowdevices.Thesystemmustnotbedependentonthedevicesconnectedtoit,otherwisemodificationsorimprovementswouldbeimpossible・AprocedurehasaIsotobed

8、evisedtodecidewhichdevicewiIIbeincontrolofthebusandwhen.And,ifdifferentdeviceswithdiffere