Networking Silicon — 82551IT
Table 25. Register 1: Status
Bit(s)
Name
Description
Default
R/W
RO
3
Auto-Negotiation
Ability
1 = PHY is able to perform Auto-Negotiation
1
2
1
0
Link Status
1 = Valid link has been established
0 = Invalid link detected
0
0
1
RO
LL
Jabber Detect
1 = Jabber condition detected
0 = No jabber condition detected
RO
LH
Extended
Capability
1 = Extended register capabilities enabled
RO
9.1.3
9.1.4
Register 2: PHY Identifier Register
Table 26. Register 2: PHY Identifier
Bit(s)
15:0
Name
Description
Default
R/W
RO
PHY ID (high
byte)
Value: 02A8h
--
Register 3: PHY Identifier Register
Table 27. Register 3 PHY Identifier
Bit(s)
15:0
Name
PHY ID (low byte) Value: 0154h
Description
Default
R/W
RO
--
9.1.5
Register 4: Auto-Negotiation Advertisement Register
Table 28. Register 4: Auto-Negotiation Advertisement
Bit(s)
15
Name
Next Page
Description
Default
R/W
Constant 0 = Transmitting primary capability data
page
0
RO
14
13
Reserved
This bit is reserved and should be set to 0b.
0
0
RO
Remote Fault
1 = Indicate link partner’s remote fault
0 = No remote fault
RW
12:5
4:0
TechnologyAbility Technology Ability Field is an 8-bit field containing
00101111 RW
Field
information indicating supported technologies specific
to the selector field value.
Selector Field
The Selector Field is a 5-bit field identifying the type of
message to be sent via Auto-Negotiation. This field is
read only in the 82551IT and contains a value of
00001b, IEEE Standard 802.3.
00001
RO
Datasheet
63
INTEL [ INTEL ]
