Transcription of RS-485 Half-Duplex EVM User's Guide (Rev. B) - …
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RS-485 Half-Duplex EVM User's Guide (Rev. B) - …
User's GuideSLLU173B October2012 RevisedJune2013RS-485 half -DuplexEvaluationModuleThismanualdes cribestheRS-485 half -DuplexEvaluationModule(EVM).ThisEVM helpsdesignersevaluatethedeviceperforman ce,supportingthefastdevelopmentandanalys isofdatatransmissionsystemsusinganyofthe TIRS-485half-duplexdevicesin :LeftasReceiverEVM, October2012 RevisedJune2013RS-485 half -DuplexEvaluationModuleSubmitDocumen tationFeedbackCopyright 2012 2013,TexasInstrumentsIncorporatedRTRTABD DERREDRVccRFSRFSABDDERREPOLCORDRABDDERPO LCORDRREABDDERPOLCORDRREM asterSN65 HVD82 SlaveSN65 HVD888 SlaveSN65 HVD888 SlaveSN65 HVD888 Cross-wirefault 0 the8-pinSOIC packagehaverobustdriversandreceiversin a , differentialdriveranda differentialreceiver,whichoperatefroma busportsuitableforhalf- duplex (two-wirebu s)communication,andallfeaturea ' :ThisEVMcomeswithouta ,8-pinSOICRS-485transceiverandsolderit (SeeFigure1). TheSN65 HVD888transceivercorrectsa wrongbussignalpolaritycausedbya : a failsafebiasingnetworkmustbeimplemented( atthemasternode)tosetlogicreferenceandde finethesignalpolarityofthebus, a slavenodemusthaveitsreceiverenabledandit sdriverdisabled(RE= DE= Low), thebusmustbeidlingforthefailsafetime, ,thepolaritycorrectionis completeandis appliedtoboth, :Datastreamsofconsecutive0 s or1 s withdurationsexceedingtFS-mincanaccident lytriggera October2012 RevisedJune2013 SubmitDocumentationFeedbackCopyright 2012 2013,TexasInstrumentsInc
EVALUATION BOARD/KIT/MODULE (EVM) ADDITIONAL TERMS Texas Instruments (TI) provides the enclosed Evaluation Board/Kit/Module …
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