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250 Software Developer’s Manual
Register Descriptions
82544GC/EI Only:
Table 13-21. Auto-Negotiation Advertisement Register Bit Description
(MODE[3:0] is one of 001xb, 0111b)
Field Bit(s) Description Mode HW Rst SW Rst
Reserved 4:0
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Reserved bit is R/W to allow forward
compatibility with future IEEE standards.
R/W 00000b Retain
1000BASE-X Full
Duplex
5
1b = Advertise
0b = Not advertised
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Bit 5: ANEG[3] = 1b
R/W ANEG[3] Retain
1000BASE-X Half
Duplex
6
1b = Advertise
0b= Not advertised
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Bit 6: ANEG[2] = 1b
R/W ANEG[2] Retain
Pause 7
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
R/W 0b Retain
Asymmetric Pause 8
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
R/W 000b Retain
Reserved 11:9
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Reserved bit is R/W to allow forward
compatibility with future IEEE standards.
R/W 0b Retain
RF1 12
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Ethernet controller has no ability to
detect remote fault.
R/W 0b Retain
RF2 13
Values programmed in this register have
no effect unless Auto-Negotiation is
restarted (PHY Control Register) or the
link goes down.
Ethernet controller has no ability to
detect remote fault.
R/W 0b Retain
Reserved 14 Reserved. Should be set to 0b. RO Always 0b