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Software Developer’s Manual 247
Register Descriptions
13.4.7.1.5 Auto-Negotiation Advertisement Register
ANA (04d; R/W)
Table 13-20. Auto-Negotiation Advertisement Register Bit Description
Field Bit(s) Description Mode HW Rst SW Rst
Selector Field 4:0
00001b = 802.3
For the 82541xx and 82547GI/EI:
Other combinations are reserved.
Unspecified or reserved combinations
should not be transmitted.
Note: Setting this field to a value other
than 00001b can cause auto
negotiation to fail.
RO Always 00001b
10BASE-TX Half
Duplex
10Base-T (82541xx
and 82547GI/EI)
5
1b = Advertise.
0b = Not advertised.
Values programmed in the Auto-
Negotiation Advertisement Register
have no effect unless Auto-
Negotiation is restarted (PHY Control
Register) or link goes down.
This bit can be overridden by the PHY
Control Register.
82544GC/EI only:
Bit 5: (ANEG[3:0] = 0000b |
ANEG[3:2] = 11b) and (MODE[3:0] is
not any of xx01b, 1x00b, 001xb,
0111b).
82541xx and 82547GI/EI only:
1b = DTE is 10BASE-T capable.
0b = DTE is not 10BASE-T capable.
R/W
1b
ANEG[3:1]
MODE[3:0]
1b
Retain
10BASE-TX Full
Duplex
10Base-T Full Duplex
(82541xx and
82547GI/EI)
6
1b = Advertise.
0b = Not advertised.
Values programmed in the Auto-
Negotiation advertisement register
have no effect unless Auto-
Negotiation is restarted (PHY Control
Register) or link goes down.
This bit can be overridden by the PHY
Control Register.
82544GC/EI only:
Bit 5: (ANEG[3:0] = 0001b |
ANEG[3:2] = 11b) and (MODE[3:0] is
not any of xx01b, 1x00b, 001xb,
0111b).
82541xx and 82547GI/EI only:
1b = DTE is 10BASE-T full duplex
capable.
0b = DTE is not 10BASE-T full duplex
capable.
R/W
1b
ANEG[3:0]
MODE[3:0]
1b
Retain