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ID:18593833
大小:691.50 KB
页数:24页
时间:2018-09-19
《蒋姝佩毕业设计译文》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、西安工程大学本科毕业设计(译文)译文原文题目:A5191HRTAMISHART™Modem译文题目:A5191HRT型HART调制解调器学院:电子信息学院专业班级:自动化2009级04班学生姓名:蒋姝佩学号:4090501043522西安工程大学本科毕业设计(译文)22西安工程大学本科毕业设计(译文)A5191HRTAMISHART™Modem1.FeaturesCanbeusedindesignspresentlyusingtheSYM20C15Single-chip,half-duplex1200bits
2、persecondFSKmodemBell202shiftfrequenciesof1200Hzand2200Hz3.3V-5.0VpowersupplyTransmit-signalwaveshapingReceiveband-passfilterLowpower:optimalforintrinsicallysafeapplicationsCMOScompatibleInternaloscillatorrequires460.8kHzcrystalorceramicresonatorMeetsHARTph
3、ysicallayerrequirementsIndustrialtemperaturerangeof-40°Cto+85°CAvailablein28-pinPLCCand32-pinLQFPpackages2.DescriptionTheA5191HRTisasingle-chip,CMOSmodemforuseinhighwayaddressableremotetransducer(HART)fieldinstrumentsandmasters.Themodemandafewexternalpassiv
4、ecomponentsprovideallofthefunctionsneededtosatisfyHARTphysicallayerrequirementsincludingmodulation,demodulation,receivefiltering,carrierdetect,andtransmit-signalshaping.TheA5191HRTispin-compatiblewiththeSYM20C15.SeethePinDescriptionandFunctionalDescriptions
5、ectionsfordetailsonpincompatibilitywiththeSYM20C15.TheA5191HRTusesphasecontinuousfrequencyshiftkeying(FSK)at1200bitspersecond.Toconservepowerthereceivecircuitsaredisabledduringtransmitoperationsandviceversa.Thisprovidesthehalf-duplexoperationusedinHARTcommu
6、nications.22西安工程大学本科毕业设计(译文)Figure2-128-PinPLCCPinoutDiagrams(green&non-green)Figure2-232-PinLQFPPinoutDiagrams(green&non-green)Table2-1PinoutSummary28-PinPLCC,A5191HRTP/Pg(12197-504/508)PinN0.SignalNameTypePindescription1TEST1InputConnecttoVSS2TEST2-Noconn
7、ect3TEST3-Noconnect4TEST4-Noconnect5TEST5InputConnecttoVSS6INRESETInputResetalldigitallogicwhenlow7TEST7InputConnecttoVSS8TEST8InputConnecttoVSS9TEST9InputConnecttoVSS10OTXAOutputOutputtransmitanalog,FSKmodulatedHARTtransmitsignalto4-20mAloopinterfacecircui
8、t22西安工程大学本科毕业设计(译文)11IAREFInputAnalogreferencevoltage12ICDREFInputCarrierdetectreferencevoltage13OCBIASOutputComparatorbiascurrent14TEST10InputConnecttoVSS15VDDAPowerAnalogsupplyvoltage16IRXAInputFSKmo
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