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126 www.xilinx.com Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
Chapter 9: Configuration and Status
R
Register 6: Auto-Negotiation Expansion
Register 7: Next Page Transmit
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 return 0s returns 0s 00000
Table 9-7: Auto-Negotiation Link Partner Ability Base Register (Register 5)
Bit(s) Name Description Attributes
Default
Value
MDIO Register 6: Auto-Negotiation Expansion
Table 9-8: 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
Always returns a ‘1’ for this bit
since the device is Next Page Able
returns 1 1
6.1 Page
Received
1 = A new page has been received
0 = A new page has not been
received
read only
self clearing on
read
0
6.0 Reserved Always returns 0s returns 0s 0000000
NEXT PAGE ABLE
PAGE RECEIVED
RESERVED
15 0
Reg 6
RESERVED
321
MDIO Register 7: Next Page Transmit
NEXT PAGE
RESERVED
MESSAGE PAGE
15 14 13 12 11 0
Reg 7
TOGGLE
MESSAGE CODE
ACKNOWLEDGE 2
10