AM79C989JCT Advanced Micro Devices, AM79C989JCT Datasheet - Page 23

• Manufacturer Part Number: AM79C989JCT
• Description: Quad Ethernet Switching Transceiver (QuEST)
• Manufacturer: Advanced Micro Devices

Auto-Negotiation Expansion Register (Reg 6)
The Auto-Negotiation Expansion Register (Reg 6) pro-
vides additional information which assists in the Auto-
Auto-Negotiation Next Page Register (Reg 7)
The Auto-Negotiation Next Page Register (Reg 7) con-
tains the next link page link code word to be transmit-
ted. The Auto-Negotiation Next Page Register contains
Bit(s)
Bit(s)
10:0
15:4
15
14
13
12
11
3
2
1
0
Link Partner Auto-
Link Partner Next
Negotiation Able
Acknowledge 2
Message Page
Message Field
Next Page Able
Page Received
Next Page
Reserved
Page Able
Reserved
Toggle
Name
Name
Table 14. Auto-Negotiation Expansion Register (Reg 6)
Table 15. Auto-Negotiation Next Page Register (Reg 7)
1 = QuEST device port next page requested;
0 = QuEST device port next page not requested.
Written and read as zero.
1 = QuEST device port message page requested;
0 = QuEST device port unformatted page requested.
1 = QuEST device port can comply with the request;
0 = QuEST device port cannot comply with the request.
QuEST device port toggle bit.
Message code field.
Written and read as zero.
1 = Link partner is next page able.
0 = Link partner is not next page able.
1 = QuEST device port is next page able.
0 = Not applicable.
1 = A new page has been received.
0 = A new page has not been received.
Cleared on Read.
1 = Link partner is Auto-Negotiation able.
0 = Link partner is not Auto-Negotiation able.
P R E L I M I N A R Y
Am79C989
Description
Description
Negotiation process. The Auto-Negotiation Register
bits are Read/Only (R/O) or Cleared on Read (COR).
This register is duplicated for each port.
Read/Write (R/W) or Read/Only (R/O) bits. On power-
up the default value of 0x2001 represents a message
page with the message code set to null. This register is
duplicated for each port.
R/O, COR
Read/
Write
R/O
R/O
R/O
R/O
Read/
Write
R/W
R/W
R/W
R/W
R/O
R/O
Default/
Default/
Reset
Reset
0x001
0
1
0
0
0
0
1
0
0
0
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