Data Sheet

USBProtocolSuiteUserManual 23
CommonFeatures TeledyneLeCroyCorporation
1.1.5 Real-Time Event Triggering and Capture Filtering
TheAnalyzercanaccuratelyidentifyandselectivelyrecordtransactionsofinterestfrom
thecrowdedstreamofbustraffic.Thesystemusesmorethanadozenconfigurable
hardwarebuildingblocksthatyoucanoptimizetoperformparticularactivities.Such
“recordingresources”canindependentlyawaitaninitializationsignal,monitorits
externalenvironment(externalsignalsorotherresources)insearchofaparticularevent,
andtakeasubsequentaction,suchastriggering,inclusiveorexclusivefiltering,and
counting.Intheuserinterface,youcanselect,configure,andcombinetheseresourcesto
searchforcomplextriggerconditionsandselectivelycaptureassociatedtransactions.
Thesystemcantriggeronbasicevents,suchasspecificbusconditionsand
packet identifiers(PID).Itcanalsotriggeroncomplexevents,suchas“triggeronthe
fifth occurrenceofaSETUPTokendevicenumbernine”or“triggeronaSETINTERFACE
request,followingaspecifiedeight‐bytebulkdatapatternmatchfromthisscanner,and
donotcaptureanystart‐of‐frame(SOF)packets.”
Youcansetthesizeoftherecordingmemory,specifythepre‐triggertopost‐trigger
captureratio,andtruncatelargedatapacketsupto256bytes.
AdvancedEventCountingandSequencing
Thecountandsequenceoptionsdefinerulesfordatarecordingsessions.Theseoptions
configureandcontroltheorderofeventsselectedfortriggeringorfiltering.
Usingthisfeature,youcanspecifyasequenceofuptoseveneventsthatmustoccur
beforetheAnalyzertriggersandfinishescapturingdata,allowingyoutospecify
event typesforrecording.Withoutthisfeature,youmayhavetoscrollthrough
megabytesofrecordeddatatolocateanoccurrenceofasequence.
1.1.6 BusEngine Technology
TheAnalyzerusesTeledyneLeCroyBusEngineTechnology.TheBusEnginecoreuses
ElectricallyProgrammableLogicDevice(EPLD)technologyandincorporatesbothareal‐
timerecordingengineandconfigurablebuildingblocksthatimplementdata/state/error
detection,triggering,capturefiltering,externalsignalmonitoring,andeventcounting
andsequencing.Liketheflash‐memory‐basedfirmwarethatcontrolsitsoperation,all
BusEnginelogicisfullyfieldupgradeable,usingconfigurationfiles.