AM79C989 Datasheet, PDF (22/37 Pages) Advanced Micro Devices – Quad Ethernet Switching Transceiver (QuEST™)

PRELIMINARY
Auto-Negotiation Link Partner Ability Register
(Reg 5)
The Auto-Negotiation Link Partner Ability Register
(Reg 5) describes the advertised ability of the link
partner. The register is Read/Only (R/O). The bits rep-
resent the received link code word. This register con-
tains either the base page or the link partner's next
pages. This register is duplicated for each port.
Table 12. Base Page Format
Bit(s)
15
14
13
12:5
4:0
Name
Description
Next Page
1 = Link partner next page requested;
0 = Link partner next page not requested.
Acknowledge
1 = Link Partner acknowledged;
0 = Link Partner not acknowledged.
Remote Fault
1 = Link Partner has a remote fault;
0 = Link Partner does not have a remote fault.
Technology Ability Link Partner technology ability.
Selector Field Link partner selector field.
Read/
Write
R/O
R/O
R/O
R/O
R/O
Default/
Reset
0
0
0
0
0
Table 13. Next Page Format
Bit(s)
15
14
13
12
11
10:0
Name
Next Page
Acknowledge
Message Page
Acknowledge 2
Toggle
Message Field
Description
1 = Link partner next page requested;
0 = Link partner next page not requested.
1 = Link Partner acknowledged;
0 = Link Partner not acknowledged.
1 = Link Partner message page;
0 = Link Partner unformatted next page.
1 = Link Partner can comply with the request
0 = Link Partner cannot comply with the request.
Link partner toggle bit.
Link partner's message code.
Read/
Write
R/O
R/O
R/O
R/O
R/O
R/O
Default/
Reset
0
0
0
0
0
0
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Am79C989