
5.41ReceivePauseTimerRegister(RXPAUSE)
5.42TransmitPauseTimerRegister(TXPAUSE)
EthernetMediaAccessController(EMAC)Registers
Thereceivepausetimerregister(RXPAUSE)isshowninFigure81anddescribedinTable80.
Figure81.ReceivePauseTimerRegister(RXPAUSE)
3116
Reserved
R-0
150
PAUSETIMER
R-0
LEGEND:R=Readonly;-n=valueafterreset
Table80.ReceivePauseTimerRegister(RXPAUSE)FieldDescriptions
BitFieldValueDescription
31-16Reserved0Reserved
15-0PAUSETIMER0-FFhReceivepausetimervalue.Thesebitsallowthecontentsofthereceivepausetimertobe
observed.ThereceivepausetimerisloadedwithFF00hwhentheEMACsendsanoutgoingpause
frame(withpausetimeofFFFFh).Thereceivepausetimerisdecrementedatslottimeintervals.If
thereceivepausetimerdecrementsto0,thenanotheroutgoingpauseframeissentandthe
load/decrementprocessisrepeated.
Thetransmitpausetimerregister(TXPAUSE)isshowninFigure82anddescribedinTable81.
Figure82.TransmitPauseTimerRegister(TXPAUSE)
3116
Reserved
R-0
150
PAUSETIMER
R-0
LEGEND:R=Readonly;-n=valueafterreset
Table81.TransmitPauseTimerRegister(TXPAUSE)FieldDescriptions
BitFieldValueDescription
31-16Reserved0Reserved
15-0PAUSETIMER0-FFhTransmitpausetimervalue.Thesebitsallowthecontentsofthetransmitpausetimertobe
observed.Thetransmitpausetimerisloadedbyareceived(incoming)pauseframe,andthen
decrementedatslottimeintervalsdownto0,atwhichtimeEMACtransmitframesareagain
enabled.
SPRUEQ6–December2007EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO)119
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