5.50.12ReceiveQOSFilteredFramesRegister(RXQOSFILTERED)
5.50.13ReceiveOctetFramesRegister(RXOCTETS)
5.50.14GoodTransmitFramesRegister(TXGOODFRAMES)
5.50.15BroadcastTransmitFramesRegister(TXBCASTFRAMES)
EthernetMediaAccessController(EMAC)Registers
TodeterminethenumberofreceiveframesdiscardedbytheEMACforanyreason,sumthefollowing
statistics(promiscuousmodedisabled):
•Receivefragments
•Receiveundersizedframes
•ReceiveCRCerrors
•Receivealignment/codeerrors
•Receivejabbers
•Receiveoverruns
•Receivefilteredframes
Thismaynotbeanexactcountbecausethereceiveoverrunsstatisticisindependentoftheother
statistics,soifanoverrunoccursatthesametimeasoneoftheotherdiscardreasons,thentheabove
sumdouble-countsthatframe.
ThetotalnumberofframesreceivedontheEMACthatwerefilteredduetoreceivequalityofservice
(QOS)filtering.Suchaframeisdefinedashavingallofthefollowing:
•AnydataorMACcontrolframethatmatchedaunicast,broadcast,ormulticastaddress,ormatched
duetopromiscuousmode
•Theframedestinationchannelflowcontrolthresholdregister(RXnFLOWTHRESH)valuewas
greaterthanorequaltothechannel'scorrespondingfreebufferregister(RXnFREEBUFFER)value
•Wasoflength64toRXMAXLEN
•RXQOSENbitissetinRXMBPENABLE
•HadnoCRCerror,alignmenterror,orcodeerror
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofbytesinallgoodframesreceivedontheEMAC.Agoodframeisdefinedashaving
allofthefollowing:
•AnydataorMACcontrolframethatmatchedaunicast,broadcast,ormulticastaddress,ormatched
duetopromiscuousmode
•Wasoflength64toRXMAXLENbytesinclusive
•HadnoCRCerror,alignmenterror,orcodeerror
SeeSection2.5.5fordefinitionsofalignment,code,andCRCerrors.Overrunshavenoeffectonthis
statistic.
ThetotalnumberofgoodframestransmittedontheEMAC.Agoodframeisdefinedashavingallofthe
following:
•AnydataorMACcontrolframethatwasdestinedforanyunicast,broadcast,ormulticastaddress
•Wasanylength
•Hadnolateorexcessivecollisions,nocarrierloss,andnounderrun
ThetotalnumberofgoodbroadcastframestransmittedontheEMAC.Agoodbroadcastframeis
definedashavingallofthefollowing:
•AnydataorMACcontrolframedestinedforaddressFF-FF-FF-FF-FF-FFhonly
•Wasofanylength
•Hadnolateorexcessivecollisions,nocarrierloss,andnounderrun
SPRUEQ6–December2007EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO)127
SubmitDocumentationFeedback
