AM79C874VC AMD (ADVANCED MICRO DEVICES), AM79C874VC Datasheet - Page 36

• Manufacturer Part Number: AM79C874VC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM79C874VC

• Lead Free Status / RoHS Status: Not Compliant

Reserved Registers (Registers 8-15, 20, 22, 25-31)
The NetPHY-1LP device contains reserved registers at addresses 8-15, 20, 22, 25-31. These registers should be
ignored when read and should not be written at any time.
36
Reg
Reg
17
6
6
6
6
6
6
7
7
7
7
7
15:5
10:0
Bit
Bit
15
14
13
12
11
4
3
2
1
0
Name
Reserved
Parallel Detection
Fault
Link Partner Next
Page Able
Next Page Able
Page Received
Link Partner Auto-
Negotiation Able
Table 22. Auto-Negotiation Next Page Advertisement Register (Register 7)
Name
NP
Reserved
MP
ACK2
TOG_TX
CODE
Table 21. Auto-Negotiation Expansion Register (Register 6)
Description
Ignore when read.
1 = Fault detected by parallel detection logic. This fault is due to
more than one technology detecting concurrent link up
conditions. This bit is cleared upon reading this register.
0 = No fault detected by parallel detection logic.
1 = Link partner supports next page function.
0 = Link partner does not support next page function.
Next page is supported. This bit is permanently tied to 1.
This bit is set when a new link code word has been received into
the Auto-Negotiation Link Partner Ability Register. This bit is
cleared upon reading this register.
1 = Link partner is auto-negotiation able.
0 = Link partner is not auto-negotiation able.
Description
Next page indication:
1 = Another Next Page desired.
0 = No other Next Page Transfer desired.
Ignore when read.
Message page:
1 = Message page.
0 = Un-formatted page.
Acknowledge 2:
1 = Will comply with message.
0 = Cannot comply with message.
Toggle:
1 = Previous value of transmitted link code word equals to 0.
0 = Previous value of transmitted link code word equals to 1.
Message/Un-formatted Code Field.
D A T A
Am79C874
S H E E T
RO/LH
RO/LH
Read/
Read/
Write
Write
RW
RW
RW
RW
RW
RO
RO
RO
RO
RO
Default
Default
22235K
001
0
0
0
1
0
0
0
0
1
0
0