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Software Developer’s Manual 257
Register Descriptions
13.4.7.1.10 1000BASE-T Control Register
GCON (09d; R/W)
Table 13-28. 1000BASE-T Control Register Bit Description
Bit(s) Field Description Mode HW Rst SW Rst
7:0 Reserved Reserved. Should be set to 00000000b. R/W 0b 0b
8
1000BASE-T Half
Duplex
1b = Advertise.
0b = Not advertised.
82544GC/EI only:
Bit 8 = ANEG[2].
82541xx and 82547GI/EI only:
1b = DTE is 1000BASE-T capable.
0b = DTE is not 1000BASE-T capable.
This bit is used by Smart Negotiation.
R/W 0b
ANEG[2]
Retain
9
1000BASE-T Full
Duplex
1b = Advertise.
0b = Not advertised.
82544GC/EI only:
Bit 9 = ANEG[3].
82541xx and 82547GI/EI only:
1b = DTE is 1000BASE-T full duplex
capable.
0b = DTE is not 1000BASE-T full duplex
capable. This bit is used by Smart
Negotiation (see Note 3).
R/W 1b
ANEG[3]
Retain
10 Port Type
1b = Prefer multi-port device
(MASTER).
0b = Prefer single port device (SLAVE)
1
.
82544GC/EI only:
Bit 10 =!ANEG[0].
Bit 10 is ignored if bit 12 = 1b.
R/W 1b
2
ANEG[0]
Retain
11
MASTER/SLAVE
Configuration Value
1b = Manual configure as MASTER
3
.
0b = Manual configure as SLAVE
3
.
82544GC/EI only:
Bit 11 =!ANEG[0].
Bit 11 is ignored if bit 12 = 0b.
R/W 1b
2
ANEG[0]
Retain
12
MASTER/SLAVE
Manual Configuration
Enable
1b = Manual MASTER/SLAVE
configuration.
0b = Automatic MASTER/SLAVE
configuration.
82544GC/EI only:
Bit 12 =!ANEG[1].
R/W 1b
2
ANEG[1]
Retain