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5.43MACAddressLowBytesRegister(MACADDRLO)
EMACPortRegisters
TheMACaddresslowbytesregister(MACADDRLO)isshowninFigure71anddescribedinTable71.
Figure71.MACAddressLowBytesRegister(MACADDRLO)
312120191816
ReservedVALIDMATCHCHANNEL
FILT
R-0R/W-xR/W-xR/W-x
15870
MACADDR0MACADDR1
R/W-0R/W-0
LEGEND:R/W=Read/Write;R=Readonly;-n=valueafterreset
Table71.MACAddressLowBytesRegister(MACADDRLO)FieldDescriptions
BitFieldValueDescription
31-21Reserved0Reserved
20VALIDAddressvalidbit.ThisbitshouldbeclearedtozeroforunusedaddressRAMlocations.
0Addresslocationisnotvalidandwillnotbeusedindeterminingwhetherornotanincomingpacket
matchesorisfiltered
1Addresslocationisvalidandwillbeusedindeterminingwhetherornotanincomingpacket
matchesorisfiltered
19MATCHFILTMatchorfilterbit.
0Theaddresswillbeused(ifVALIDisset)todetermineiftheincomingpacketaddressshouldbe
filtered
1Theaddresswillbeused(ifVALIDisset)todetermineiftheincomingpacketaddressisamatch
18-16CHANNELChannelbit;determineswhichreceivechannelavalidaddressmatchwillbetransferredto.The
channelisadon'tcareiftheMATCHFILTbitisclearedtozero.
15-8MACADDR0MACaddresslower8bits(byte0)
7-0MACADDR1MACaddressbits15-8(byte1)
SPRU975B–August2006EthernetMediaAccessController(EMAC)/ManagementDataInput/Output(MDIO)129
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