Xilinx Virtex-4 User Manual

144 www.xilinx.com Embedded Tri-Mode Ethernet MAC User Guide
UG074 (v2.2) February 22, 2010
Chapter 4: Physical Interface
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Table 4-14: Auto-Negotiation Link Partner Ability Base Register (Register 5)
Bit(s) Name Description Attributes Default Value
5.15 Next Page
1 = Next page functionality is
supported.
0 = Next page functionality is not
supported.
Read Only 0
5.14 Acknowledge
Used by the auto-negotiation function to
indicate reception of a link partner’s
base or next page.
Read Only 0
5.13:12 Remote Fault
00 = No Error.
01 = Offline.
10 = Link Failure.
11 = Auto-Negotiation Error.
Read Only 00
5.11:9 Reserved Always returns 0s. Returns 0s 000
5.8:7 Pause
00 = No PAUSE.
01 = Symmetric PAUSE supported.
10 = Asymmetric PAUSE supported.
11 = Both symmetric PAUSE and
asymmetric PAUSE supported.
Read Only 00
5.6 Half Duplex
1 = Half-duplex mode is supported.
0 = Half-duplex mode is not supported.
Read Only 0
5.5 Full Duplex
1 = Full-duplex mode is supported.
0 = Full-duplex mode is not supported.
Read Only 0
5.4:0 Reserved Always returns 0s. Returns 0s 00000
Table 4-15: Auto-Negotiation Expansion Register (Register 6)
Bit(s) Name Description Attributes Default Value
6.15:3 Reserved Always returns 0s. Returns 0s 0000000000000
6.2 Next Page Able
The Ethernet MAC always returns a 1
for this bit because the device is Next
Page Able.
Returns 11
6.1 Page Received
1 = A new page is received.
0 = A new page is not received.
Read only.
Self clearing
on read.
0
6.0 Reserved Always returns 0s. Returns 0s 0000000
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Xilinx Virtex-4 Specifications

General

Brand	Xilinx
Model	Virtex-4
Category	Motherboard
Language	English