5.50.8ReceiveJabberFramesRegister(RXJABBER)
5.50.9ReceiveUndersizedFramesRegister(RXUNDERSIZED)
5.50.10ReceiveFrameFragmentsRegister(RXFRAGMENTS)
5.50.11FilteredReceiveFramesRegister(RXFILTERED)
EthernetMediaAccessController(EMAC)Registers
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofjabberframesreceivedontheEMAC.Ajabberframeisdefinedashavingallofthe
following:
•WasanydataorMACcontrolframethatmatchedaunicast,broadcast,ormulticastaddress,or
matchedduetopromiscuousmode
•WasgreaterthanRXMAXLENbyteslong
•HadaCRCerror,alignmenterror,orcodeerror
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofundersizedframesreceivedontheEMAC.Anundersizedframeisdefinedas
havingallofthefollowing:
•Wasanydataframethatmatchedaunicast,broadcast,ormulticastaddress,ormatcheddueto
promiscuousmode
•Waslessthan64byteslong
•HadnoCRCerror,alignmenterror,orcodeerror
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofframefragmentsreceivedontheEMAC.Aframefragmentisdefinedashavingall
ofthefollowing:
•Anydataframe(addressmatchingdoesnotmatter)
•Waslessthan64byteslong
•HadaCRCerror,alignmenterror,orcodeerror
•Wasnottheresultofacollisioncausedbyhalfduplex,collisionbasedflowcontrol
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofframesreceivedontheEMACthattheEMACaddressmatchingprocessindicated
shouldbediscarded.Suchaframeisdefinedashavingallofthefollowing:
•Wasanydataframe(notMACcontrolframe)destinedforanyunicast,broadcast,ormulticast
address
•DidnotexperienceanyCRCerror,alignmenterror,codeerror
•Theaddressmatchingprocessdecidedthattheframeshouldbediscarded(filtered)becauseitdid
notmatchtheunicast,broadcast,ormulticastaddress,anditdidnotmatchduetopromiscuous
mode.
126EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO)SPRUEQ6–December2007
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