Filter
Top Products
www.ti.com
EMACPortRegisters
Table57.MACControlRegister(MACCONTROL)FieldDescriptions(continued)
BitFieldValueDescription
1Receiveflowcontrolenabled.Forfull-duplexmode,outgoingpauseframesaresentwhen
receiveFIFOflowcontrolistriggered.
11CMDIDLECommandIdlebit
0Idlenotcommanded
1Idlecommanded(readIDLEintheMACSTATUSregister)
10Reserved0Reserved
9TXPTYPETransmitqueueprioritytype
0Thequeueusesaround-robinschemetoselectthenextchannelfortransmission
1Thequeueusesafixed-priority(channel7highestpriority)schemetoselectthenextchannel
fortransmission
8Reserved0Reserved
7GIGGigabitmode
0Gigabitmodeisdisabled;10/100modeisinoperation
1Gigabitmodeisenabled(full-duplexonly)
6TXPACETransmitpacingenablebit
0Transmitpacingisdisabled
1Transmitpacingisenabled
5GMIIENGMIIenablebit
0GMIIRXandTXareheldinreset
1GMIIRXandTXareenabledforreceiveandtransmit
4TXFLOWENTransmitflowcontrolenablebit.Thisbitdeterminesifincomingpauseframesareacteduponin
full-duplexmode.Incomingpauseframesarenotacteduponinhalf-duplexmode,regardlessof
thisbitsetting.TheRXMBPENABLEbitsdeterminewhetherornotreceivedpauseframesare
transferredtomemory.
0Transmitflowcontrolisdisabled.Full-duplexmode:incomingpauseframesarenotactedupon.
1Transmitflowcontrolisenabled.Full-duplexmode:incomingpauseframesareactedupon.
3RXBUFFERReceivebufferflowcontrolenablebit
FLOWEN
0Receiveflowcontrolisdisabled.Half-duplexmode:noflowcontrolgeneratedcollisionsare
sent.Full-duplexmode:nooutgoingpauseframesaresent.
1Receiveflowcontrolisenabled.Half-duplexmode:collisionsareinitiatedwhenreceivebuffer
flowcontrolistriggered.Full-duplexmode:outgoingpauseframesaresentwhenreceiveflow
controlistriggered.
2Reserved0Reserved
1LOOPBACKLoopbackmode.Theloopbackmodeforcesinternalfull-duplexmoderegardlessofthe
FULLDUPLEXbit.TheloopbackbitshouldbechangedonlywhenGMIIENbitisde-asserted.
0Loopbackmodeisdisabled
1Loopbackmodeisenabled
0FULLDUPLEXFullduplexmode.Thegigabitmodeforcesfullduplexmoderegardlessofwhetherthe
FULLDUPLEXbitissetornot.
0Half-duplexmodeisenabled
1Full-duplexmodeisenabled
EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO) 114SPRU975B–August2006
SubmitDocumentationFeedback