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128 www.xilinx.com Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
Chapter 9: Configuration and Status
R
Register 15: Extended Status
8.12 Acknowledge 2 1 = Comply with message
0 = Cannot comply with message
read only 0
8.11 Toggle Value toggles between subsequent
Next Pages
read only 0
8.10:0 Message /
Unformatted
Code Field
Message Code Field or Unformatted
Page Encoding as dictated by 8.13
read only 00000000000
Table 9-10: Auto-Negotiation Next Page Receive (Register 8) (Continued)
Bit(s) Name Description Attributes Default Value
MDIO Register 15: Extended Status Register
Table 9-11: Extended Status Register (Register 15)
Bit(s) Name Description Attributes Default Value
15.15 1000BASE-X
Full Duplex
Always returns a ‘1’ for this bit since
1000BASE-X Full Duplex is
supported
returns 1 1
15.14 1000BASE-X
Half Duplex
Always returns a ‘0’ for this bit since
1000BASE-X Half Duplex is not
supported
returns 0 0
15.13 1000BASE-T
Full Duplex
Always returns a ‘0’ for this bit since
1000BASE-T Full Duplex is not
supported
returns 0 0
15.12 1000BASE-T
Half Duplex
Always returns a ‘0’ for this bit since
1000BASE-T Half Duplex is not
supported
returns 0 0
15:11:0 Reserved Always return 0s returns 0s 000000000000
1000BASE-X FULL DUPLEX
1000BASE-X HALF DUPLEX
1000BASE-T FULL DUPLEX
15 14 13 12 11 0
Reg 15
RESERVED
1000BASE-T HALF DUPLEX