RS-232/UART Protocol Triggering and Decode for Infiniium 9000A and 9000 H-Series Oscilloscopes

Data sheet

• OrderN5462Bforauser-installedlicense • OrderOption001forafactory-installedlicensewithnew 9000A and 9000 H-Series oscilloscopes • OrderN5435AOption031foraserver-basedlicense

This application is available in the following license variations.

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Lower-speedserialbusinterfacessuchasRS-232andotherUART(universalasynchonousreceiveandtransmit)interfacesarewidelyusedtodayinelectronicdesigns.Inmanydesignstheseserialbusestendtoprovidecontent-richpointsfordebugandtest.However,sincetheseprotocolstransferbitsserially,usingatraditionaloscilloscopehaslimitations.Manuallyconvertingcaptured1’sand0’stoprotocolrequiressignificanteffort,can’tbedoneinreal-time,andincludespotentialforhumanerror.Inaddition,traditionalscopetriggersarenotsufficientforspecifyingprotocol-levelconditions.

ExtendyourscopecapabilitywithAgilent’sRS-232/UARTTriggeringandDecodeapplication.ThisapplicationmakesiteasytodebugandtestdesignsthatincludeRS-232/UARTprotocolsusingyourInfiniium9000Aand9000H-Seriesoscilloscopes.

•SetupyourscopetoshowRS-232/UARTprotocoldecodeinlessthan30seconds. •Getaccesstoarichsetofintegratedprotocol-leveltriggers. •Savetimeandeliminateerrorsbyviewingpacketsattheprotocollevel. •Usetime-correlatedviewstoquicklytroubleshootserialprotocolproblemsbacktotheirtimingorsignalintegrity rootcause.

Easily debug and test designs that include RS-232/UART using your Infiniium 9000A and 9000 H-Series oscilloscopes

Easy to find Turndecodeon/offviathe“Serial Decode”buttononthefrontoftheinstrumentorinthe“Setup”menu.Viewdecodeembeddedonthewaveformdisplayorintheprotocolviewerlistingwindow.(Seepages4-5).

30 Second RS-232/UART Setup Configureyouroscilloscopetodisplayprotocoldecodeinunder30seconds.Use“AutoSetup”toautomaticallyconfiguresamplerate,memorydepthandthresholdandtriggerlevels.

Support for both analog and digital channels Acquireserialbusesusinganycombinationofscopeordigitalchannels.UsingdigitalchannelsonMSOmodelspreservesanalogchannelsforviewingothertime-correlatedsignals.

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Getaccesstoarichsetofintegratedprotocolleveltriggers.Theapplicationincludesasuiteofconfigurableprotocol-leveltriggerconditionsspecifictoRS-232/UART.Whenserialtriggeringisselected,theapplicationenablesspecialreal-timetriggeringhardwareinsidethescope. Hardware-basedtriggeringensuresthatthescopenevermissesatriggereventwhenarmed.Thishardwaretakessignalsacquiredusingeitherscopeordigitalchannelsandreconstructsprotocolframes.Ittheninspectstheseprotocolframesagainstspecifiedprotocol-leveltriggerconditionsandtriggerswhentheconditionismet.

RS-232/UART setup and triggering

Baud rate settings Enteranybaudratebetween1,200kb/sand10Mb/s,orclickonup/downarrowstogotooneofmanypre-definedcommonbaudrates.

RS-232 Trigger Setup Quicklyaccessprotocoltriggeringviathescope’striggermenu.SpecifyRS-232triggerinHEX,binarydecimal,orASCIIupto27words.

Payload editor Choosetriggerlengthbetweenoneto27wordsandusethepayloadeditortospecifydatavalueswordbyword.

Set trigger Enter trigger conditioninHEX,binary,decimalorASCII.

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RS-232/UART protocol decode and searching

RS-232 protocol decode with precise time-correlation between waveforms and listing Agilent’sprotocolviewerincludescorrelationbetweenthewaveformsandtheselectedpacket.Theselectedpacket,highlightedbluerowinthelisting,istime-correlatedwiththebluelineinthewaveformdisplay.Movethebluetrackingmarkerintimethroughwaveformsandthebluebarwillautomaticallytrackinthepacketswindow.Or,scrollthroughthepacketviewerandhighlightaspecificpacket.Thetime-correlationtrackingmarkerwillmovetotheassociatedpointinthewaveform.

RS-232 decode embedded in waveform area Utilizetheoscilloscopewaveformareatodisplaydecodeinformation.Minorticksindicateclocktransitionsandmajorticksshowthebeginningandendofeachwordintheserialpacket.

Full screen RS-232 listing Filltheentiredisplaywithcompactprotocolinformationusingthefullscreenlisting.Theprotocolviewerwindowshowstheindexnumber,timestampvalue,anddatacontentforeachserialpacketinthelist.Scrollthoughalldecodedserialpacketstofindeventsofinterestorerrorsinthetransmission.Datainthelistingwindowcanbesavedtoa.csvor.txtfileforoff-lineanalysisordocumentation.

Post-acquisition searching Searchacquiredprotocollistingsusinga menu that is identical to the trigger menu.

Quickly find occurrences Quicklymovetonextoccurrenceofa specifiedevent.

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Use digital or analog for RS-232/UART triggeringanddecode.

RS-232/UART protocol decode

UsedigitalchannelsonMSOmodelstopreserveanalogchannelsforsimultaneouslyviewingothersignals..

See RS-232 decode next to digital waveforms.

Capturesecondstodaysofserialprotocol.Thescopefillsmemoryaseachacquisitionseesit’striggercondition.Segmentedmemoryusestimetagstotracktimebetweensegmentacquisitions.

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RS-232/UART specifications and characteristicsUART protocols supported RS-232

RS-422upto10Mbp/s,differentialprobingrecommended. RS-485upto10Mbp/s,differentialprobingrecommended. OtherUARTinterfaceswhichadmittouser-specifiedparameters availableintheapplication. Theapplicationreliesonprobingandtrigger/measurementthresholds toproperlyconditionthesignalfortriggeringanddecode.

Tx and Rx source Analogchannels1,2,3,or4 MSOmodelscanadditionallyusedigitalchannelsD0toD15 Anywaveformmemory

Auto setup Automaticallyconfigurestriggerlevels,measurementthresholds,memorydepth,samplerate,triggerandholdoffforproperdecodeandtriggering.

Decodewordsize User-selectable:5,6,7,8,or9bits Parity:odd,even,none

Decodebitorder User-selectable:LSBorMSBSupportedbaudrates Userselectable:1.2kb/supto10Mb/sIdlePolarity Userselectable:loworhighTriggering Userselectable:transmitorreceive

Userselectabledatalength:1to13words(eachwordtakes2triggersymbols) Wordsizeselectablefrom5to9bits Polarityerror EntertriggerinHEX,binary,decimalorASCII Operatorsinclude=,not=,>,<andORoneach8-bitwordboundary

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Ordering information

Software applications

Factory-installed node-locked license

for new scope purchases

User-installed node-locked

licenser

Server-based license (N5435A option)

RS-232/UART triggering and decode

001 N5462B 031

RS-232,I2C/SPI triggering and decode

018 N8800B

This application is compatible with all 9000A and 9000 H-Series oscilloscope models.

Related literature

Publication title Publication type Publication numberInfiniium 9000 Series Data Sheet 5990-3746ENInfiniium 9000 H-Series Data Sheet 5991-1520EN

Sharingtheapplicationacrossmultipleinstruments?Server-basedlicensingallowsuserstoborrowanapplicationlicenseforafixedtimeperiod.

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Product specifications and descriptions inthisdocumentsubjecttochangewithoutnotice.

©AgilentTechnologies,Inc.2012,2013PublishedinUSA,January11,20135990-3923EN

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