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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1000BASE-X PCS/PMA Management Registers<br />
Table 5-7: Auto-Negotiation Link Partner Ability Base Register (Register 5) (Cont’d)<br />
Bit(s) Name Description Type Default Value<br />
5.8:7 Pause 00 = No PAUSE.<br />
01 = Symmetric PAUSE supported.<br />
10 = Asymmetric PAUSE supported.<br />
11 = Both symmetric PAUSE and asymmetric<br />
PAUSE supported.<br />
5.6 Half Duplex 1 = Half-duplex mode is supported.<br />
0 = Half-duplex mode is not supported.<br />
5.5 Full Duplex 1 = Full-duplex mode is supported.<br />
0 = Full-duplex mode is not supported.<br />
Read Only 00<br />
Read Only 0<br />
Read Only 0<br />
5.4:0 Reserved Always returns 0s. Returns 0s 00000<br />
Table 5-8: Auto-Negotiation Expansion Register (Register 6)<br />
Bit(s) Name Description Type Default Value<br />
6.15:3 Reserved Always returns 0s. Returns 0s 0000000000000<br />
6.2 Next Page Able The <strong>Ethernet</strong> <strong>MAC</strong> always returns a 1 for this<br />
bit because the device is Next Page Able.<br />
6.1 Page Received 1 = A new page is received.<br />
0 = A new page is not received.<br />
Returns 1 1<br />
Read only. Self<br />
clearing on read.<br />
6.0 Reserved Always returns 0s. Returns 0s 0000000<br />
Table 5-9: Auto-Negotiation Next Page Transmit Register (Register 7)<br />
Bit(s) Name Description Type Default Value<br />
7.15 Next Page 1 = Additional next page(s) will follow.<br />
0 = Last page.<br />
Read/Write 0<br />
7.14 Reserved Always returns 0. Returns 0 0<br />
7.13 Message Page 1 = Message Page.<br />
0 = Unformatted Page.<br />
7.12 Acknowledge 2 1 = Complies with message.<br />
0 = Cannot comply with message.<br />
Read/Write 1<br />
Read/Write 0<br />
7.11 Toggle Value toggles between subsequent pages. Read Only 0<br />
7.10:0 Message or<br />
Unformatted<br />
Code Field<br />
Message code field or unformatted page<br />
encoding as dictated by 7.13.<br />
Table 5-10: Auto-Negotiation Next Page Receive Register (Register 8)<br />
Read/Write 00000000001<br />
(Null Message<br />
Code)<br />
Bit(s) Name Description Type Default Value<br />
8.15 Next Page 1 = Additional Next Page(s) will follow.<br />
0 = Last page.<br />
8.14 Acknowledge Used by Auto-Negotiation function to indicate<br />
reception of a link partner’s base or next page.<br />
Read Only 0<br />
Read Only 0<br />
TE<strong>MAC</strong> User Guide www.xilinx.com 127<br />
<strong>UG194</strong> (v1.10) February 14, 2011<br />
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