Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
Xilinx UG194 Virtex-5 FPGA Embedded Tri-Mode Ethernet MAC ...
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Chapter 5: MDIO Interface<br />
Table 5-5: PHY Identifier (Registers 2 and 3)<br />
Bit(s) Name Description Type Default Value<br />
2.15:0 Organizationally<br />
Unique Identifier<br />
3.15:10 Organizationally<br />
Unique Identifier<br />
3.9:4 Manufacturer’s<br />
<strong>Mode</strong>l Number<br />
Organizationally Unique Identifier<br />
(OUI) from IEEE is 0x000A35.<br />
Organizationally Unique Identifier<br />
(OUI) from IEEE is 0x000A35.<br />
Returns OUI (3-18) 0000000000101000<br />
Returns OUI (19-24) 110101<br />
Always returns 0s. Returns 0s 000000<br />
3.3:0 Revision Number Always returns 0s. Returns 0s 0000<br />
Table 5-6: Auto-Negotiation Advertisement Register (Register 4)<br />
Bit(s) Name Description Type Default Value<br />
4.15 Next Page 1 = Next page functionality is advertised.<br />
0 = Next page functionality is not advertised.<br />
Read/Write 0<br />
4.14 Reserved Always returns 0, writes ignored. Returns 0 0<br />
4.13:12 Remote Fault 00 = No error.<br />
01 = Offline.<br />
10 = Link failure.<br />
11 = Auto-negotiation error.<br />
Read/Write<br />
Self clearing to 00 after<br />
auto-negotiation<br />
4.11:9 Reserved Always return 0, writes ignored. Returns 0 0<br />
4.8:7 Pause 00 = No PAUSE.<br />
01 = Symmetric PAUSE.<br />
10 = Asymmetric PAUSE towards link partner.<br />
11 = Both symmetric PAUSE and asymmetric<br />
PAUSE towards link partner.<br />
4.6 Half Duplex The <strong>Ethernet</strong> <strong>MAC</strong> always returns a 0 for this<br />
bit because half-duplex mode is not supported.<br />
4.5 Full Duplex 1 = Full-duplex mode is advertised.<br />
0 = Full-duplex mode is not advertised.<br />
126 www.xilinx.com TE<strong>MAC</strong> User Guide<br />
<strong>UG194</strong> (v1.10) February 14, 2011<br />
00<br />
Read/Write 11<br />
Returns 0 0<br />
Read/Write 1<br />
4.4:0 Reserved Always returns 0s, writes ignored. Returns 0s 00000<br />
Table 5-7: Auto-Negotiation Link Partner Ability Base Register (Register 5)<br />
Bit(s) Name Description Type Default Value<br />
5.15 Next Page 1 = Next page functionality is supported.<br />
0 = Next page functionality is not supported.<br />
5.14 Acknowledge Used by the Auto-Negotiation function to<br />
indicate reception of a link partner’s base or<br />
next page.<br />
5.13:12 Remote Fault 00 = No Error.<br />
01 = Offline.<br />
10 = Link Failure.<br />
11 = Auto-Negotiation Error.<br />
Read Only 0<br />
Read Only 0<br />
Read Only 00<br />
5.11:9 Reserved Always returns 0s. Returns 0s 000<br />
R