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5.46TransmitChannel0-7DMAHeadDescriptorPointerRegister(TXnHDP)
EMACPortRegisters
Thetransmitchannel0-7DMAheaddescriptorpointerregister(TXnHDP)isshowninFigure74and
describedinTable74.
Figure74.TransmitChannelnDMAHeadDescriptorPointerRegister(TXnHDP)
3116
TXnHDP
R/W-x
150
TXnHDP
R/W-x
LEGEND:R/W=Read/Write;-n=valueafterreset
Table74.TransmitChannelnDMAHeadDescriptorPointerRegister(TXnHDP)FieldDescriptions
BitFieldValueDescription
31-0TXnHDPTransmitchannelnDMAHeadDescriptorpointer.WritingatransmitDMAbufferdescriptoraddress
toaheadpointerlocationinitiatestransmitDMAoperationsinthequeuefortheselectedchannel.
Writingtotheselocationswhentheyarenonzeroisanerror(exceptatreset).Hostsoftwaremust
initializetheselocationstozeroonreset.
EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO) 132SPRU975B–August2006
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