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Table 4-12: PHY Identifier (Registers 2 and 3) (Cont'd)
Bit(s)
Name
Manufacturer's
3.9:4
Model Number
Revision
3.3:0
Number
Table 4-13: Auto-Negotiation Advertisement Register (Register 4)
Bit(s)
Name
4.15
Next Page
4.14
Reserved
4.13:12 Remote Fault
4.11:9
Reserved
4.8:7
Pause
4.6
Half Duplex
4.5
Full Duplex
4.4:0
Reserved
www.BDTIC.com/XILINX
Embedded Tri-Mode Ethernet MAC User Guide
UG074 (v2.2) February 22, 2010
Description
Always returns 0s.
Always returns 0s.
Description
1 = Next page functionality is
advertised
0 = Next page functionality is not
advertised
Always returns 0, writes ignored.
00 = No error.
01 = Offline.
10 = Link failure.
11 = Auto-negotiation error.
Always return 0, writes ignored.
00 = No PAUSE.
01 = Symmetric PAUSE.
10 = Asymmetric PAUSE towards link
partner.
11 = Both symmetric PAUSE and
asymmetric PAUSE towards link
partner.
The Ethernet MAC always returns a 0
for this bit because half-duplex mode is
not supported.
1 = Full-duplex mode is advertised.
0 = Full-duplex mode is not advertised.
Always returns 0s, writes ignored.
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1000BASE-X PCS/PMA
Attributes
Default Value
Returns 0s
Returns 0s
Attributes
Default Value
Read/Write
Returns 0
Read/Write
Self clearing
to 00 after
auto-
negotiation
Returns 0
Read/Write
Returns 0
Read/Write
Returns 0s
000000
0000
0
0
00
0
11
0
1
00000
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