Intel 82558 Manuale Utente
10/100 Mbps Ethernet Controller Family Open Source Software Developer Manual
123
Physical Layer Interface
NOTE: The Auto-Negotiation Link Partner Ability Register is read only.
7.2.6
Auto-Negotiation Expansion Register: Register 6
Register 6 contains supplemental information used by the auto-negotiation process.
12:11
Technology Ability Field
RO
These bits are reserved.
000
10
Pause
RO
This bit indicates if Pause is supported by the link
partner.
partner.
0
9
100BASE-T4
a
RO
This bit indicates if 100BASE-T4 is supported by
the link partner.
the link partner.
0
8
100BASE-TX Full
Duplex
Duplex
a
RO
This bit indicates if 100Base-TX full duplex is
supported by the local node.
supported by the local node.
0
7
100BASE-TX
a
RO
This bit indicates if 100BASE-TX is supported by
the link partner
the link partner
0
6
10BASE-T Full Duplex
a
RO
This bit indicates it 10BASE-T full duplex is
supported by the link partner.
supported by the link partner.
0
5
10BASE-T
a
RO
This bit indicates if 10BASE-T is supported by the
link partner.
link partner.
0
4:0
Selector Field
RO
This field contains the Selector value from the link
partner.
partner.
00000
a.
During normal operation, the driver (management agent) does not need to change this register value. If a certain ability is not
advertised, the respective bit in the Technology Ability field must be cleared. A bit that is not supported by the device must
not be set within this field. Otherwise, the auto-negotiation protocol will be violated.
advertised, the respective bit in the Technology Ability field must be cleared. A bit that is not supported by the device must
not be set within this field. Otherwise, the auto-negotiation protocol will be violated.
Bit
Name
R / W
Description
Default
Bit
Name
R / W
Description
Default
15:5
Reserved
RO
These bits are reserved and should be set to 0.
0
4
Parallel Detection Fault
RO
1 = More than one of the 10BASE-T, 100BASE-TX,
or 100BASE-T4 PMAs detects a valid link.
0 = One or zero of the 10BASE-T, 100BASE-TX, or
100BASE-T4 PMAs detects a valid link.
or 100BASE-T4 PMAs detects a valid link.
0 = One or zero of the 10BASE-T, 100BASE-TX, or
100BASE-T4 PMAs detects a valid link.
0
3
Link Partner Next Page
Able
Able
RO
1 = Link partner supports Next Page.
0 = Link partner does not support Next Page.
0 = Link partner does not support Next Page.
0
2
Next Page Able
RO
1 = Local device supports Next Page.
0 = Local device does not support Next Page.
0 = Local device does not support Next Page.
0
1
Page Received
RO
1 = Three identical and consecutive link code words
have been received.
0 = Three identical and consecutive link code words
have not been received.
have been received.
0 = Three identical and consecutive link code words
have not been received.
0
0
Link Partner Auto-
Negotiation Able
Negotiation Able
RO
1 = Link partner supports auto-negotiation.
0 = Link partner does not support auto-negotiation.
0 = Link partner does not support auto-negotiation.
0