82801FB Datasheet, PDF (304/786 Pages) Intel Corporation – Intel I/O Controller Hub 6 (ICH6) Family

LAN Controller Registers (B1:D8:F0)
8.2.11
8.2.12
GENCNTL—General Control Register
(LAN Controller—B1:D8:F0)
Offset Address: 1Ch
Default Value: 00h
Attribute:
Size:
R/W
8 bits
Bit
Description
7:4 Reserved. These bits should be set to 0000b.
LAN Connect Software Reset — R/W.
3 ^{0 = Cleared by software to begin normal LAN Connect operating mode. Software must not attempt}
to access the LAN Connect interface for at least 1ms after clearing this bit.
1 = Software can set this bit to force a reset condition on the LAN Connect interface.
2 Reserved. This bit should be set to 0.
Deep Power-Down on Link Down Enable — R/W.
0 = Disable
1 _{1 = Enable. The ICH6’s internal LAN controller may enter a deep power-down state (sub-3 mA) in}
the D2 and D3 power states while the link is down. In this state, the LAN controller does not
keep link integrity. This state is not supported for point-to-point connection of two end stations.
0 Reserved
GENSTA—General Status Register
(LAN Controller—B1:D8:F0)
Offset Address: 1Dh
Default Value: 00h
Attribute:
Size:
RO
8 bits
Bit
Description
7:3 Reserved
Duplex Mode — RO. This bit indicates the wire duplex mode.
2 _{0 = Half duplex}
1 = Full duplex
Speed — RO. This bit indicates the wire speed.
1 _{0 = 10 Mb/s}
1 = 100 Mb/s
Link Status Indication — RO. This bit indicates the status of the link.
0 _{0 = Invalid}
1 = Valid
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Intel^® I/O Controller Hub 6 (ICH6) Family Datasheet