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Datasheet 31
Networking Silicon — 82555
7.2.1.6 Register 5: Auto-Negotiation Link Partner Ability Register Bit Definitions
7.2.1.7 Register 6: Auto-Negotiation Expansion Register Bit Definitions
7.2.2 MDI Registers 8 - 15
Registers eight through fifteen are reserved for IEEE.
7.2.3 MDI Registers 16 - 31
Register numbers 16, 17, 20, 21, 22, 23, 24, 25, and 27 are described in the following subsections.
Bit(s) Name Description Default R/W
15 Next Page This bit reflects the 82555’s link partner’s Auto-
Negotiation ability.
-- RO
14 Acknowledge This bit is used to indicate that the 82555 has
successfully received its link partner’s Auto-
Negotiation advertising ability.
-- RO
13 Remote Fault This bit reflects the 82555’s link partner’s Auto-
Negotiation ability.
-- RO
12:5 Technology Ability
Field
This bit reflects the 82555’s link partner’s Auto-
Negotiation ability.
-- RO
4:0 Selector Field This bit reflects the 82555’s link partner’s Auto-
Negotiation ability.
-- RO
Bit(s) Name Description Default R/W
15:5 Reserved These bits are reserved and should be set to a
constant 0.
0RO
4 Parallel Detection
Fault
1 = Fault detected via parallel detection (multiple link
fault occurred)
0 = No fault detected via parallel detection
This bit will self-clear on read
0RO
SC
LH
3 Link Partner Next
page Able
1 = Link Partner is Next Page able
0 = Link Partner is not Next Page able
0RO
2 Next Page Able 1 = Local drive is Next Page able
0 = Local drive is not Next Page able
0RO
1 Page Received 1 = New Page received
0 = New Page not received
This bit will self-clear on read.
0RO
SC
LH
0 Link Partner Auto-
Negotiation Able
1 = Link Partner is Auto-Negotiation able
0 = Link Partner is not Auto-Negotiation able
0RO