
Am79C978A
183
TBR6: 10BASE-T Auto-Negotiation Expansion
Register (Register 6)
The Auto-Negotiation Expansion Register provides ad-
ditional information which aids the Auto-Negotiation
process. The Auto-Negotiation Expansion Register bits
are Read Only. See Table 55.
Table 55.
TBR6: 10BASE-T Auto-Negotiation Expansion Register (Register 6)
TBR7: 10BASE-T Auto-Negotiation Next Page
Register (Register 7)
The Auto-Negotiation Next Page Register contains the
next page link code word to be transmitted. On power-up
the default value of 2001h represents a message page
with the message code set to null. See Table 56.
Table 56.
TBR7: 10BASE-T Auto-Negotiation Next Page Register (Register 7)
Reserved Registers (Registers 8-15, 18, 20-23, and
25-31)
The
Am79C978A home networking
device contains
reserved registers at addresses 8-15, 18, 20-23, and
25-31. These registers should be ignored when read
and should not be written at any time.
Bit(s)
Name
Description
Read/
Write
H/W or Soft
Reset
15:5
Reserved
RO
0
4
Parallel Detection
Fault
1 = Parallel detection fault
0 = No parallel detection fault
RO, LH
0
3
Link Partner Next
Page Able
1 = Link partner is next page able
0 = Link partner is not next page able
RO
0
2
Next Page Able
1 = Am79C978A home networking device channel is next
page able
0 = Am79C978A home networking device channel is not next
page able
RO
1
1
Page Received
1 = A new page has been received
0 = A new page has not been received
RO, LH
0
0
Link Partner ANEG
Able
1 = Link partner is Auto-Negotiation able
0 = Link partner is not Auto-Negotiation able
RO
0
Bit(s)
Name
Description
Read/
Write
H/W or Soft
Reset
15
Next Page
Am79C978A home networking device channel next page request
R/W
0
14
Reserved
RO
0
13
Message Page
Am79C978A home networking device channel message page
request
R/W
1
12
Acknowledge 2
1 = Am79C978A home networking device channel can comply
with the request
0 = Am79C978A home networking device channel cannot
comply with the request
R/W
0
11
Toggle
Am79C978A home networking device channel toggle bit
RO
0
10:0
Message Field
Message code field
R/W
0x001