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EthernetMediaAccessController(EMAC)Registers
Table53.MACControlRegister(MACCONTROL)FieldDescriptions(continued)
BitFieldValueDescription
3RXBUFFERFLOWENReceivebufferflowcontrolenablebit
0Receiveflowcontrolisdisabled.Half-duplexmode:noflowcontrolgeneratedcollisionsare
sent.Full-duplexmode:nooutgoingpauseframesaresent.
1Receiveflowcontrolisenabled.Half-duplexmode:collisionsareinitiatedwhenreceivebuffer
flowcontrolistriggered.Full-duplexmode:outgoingpauseframesaresentwhenreceiveflow
controlistriggered.
2Reserved0Reserved
1LOOPBACKLoopbackmode.Theloopbackmodeforcesinternalfull-duplexmoderegardlessofthe
FULLDUPLEXbit.TheloopbackbitshouldbechangedonlywhenGMIIENbitisdeasserted.
0Loopbackmodeisdisabled.
1Loopbackmodeisenabled.
0FULLDUPLEXFullduplexmode.
0Half-duplexmodeisenabled.
1Full-duplexmodeisenabled.
SPRU941A–April2007EthernetMediaAccessController(EMAC)/95
ManagementDataInput/Output(MDIO)
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