Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 147
UG155 March 24, 2008
Management Registers
R
Register 1: SGMII Status
0.5 Unidirectiona
l Enable
Enable transmit regardless of
whether a valid link has been
established
read/ write 0
0.4:0 Reserved Always return 0s , writes ignored returns 0s 00000
Table 9-30: SGMII Control (Register 0) (Continued)
Bit(s) Name Description Attributes
Default
Value
MDIO Register 1: SGMII Status
Table 9-31: SGMII Status (Register 1)
Bit(s) Name Description Attributes
Default
Value
1.15 100BASE-T4 Always returns a ‘0’ for this bit because
100BASE-T4 is not supported
returns 0 0
1.14 100BASE-X Full
Duplex
Always returns a ‘0’ for this bit because
100BASE-X Full Duplex is not supported
returns 0 0
1.13 100BASE-X Half
Duplex
Always returns a ‘0’ for this bit because
100BASE-X Half Duplex is not supported
returns 0 0
1.12 10 Mbps Full Duplex Always returns a ‘0’ for this bit because 10
Mbps Full Duplex is not supported
returns 0 0
1.11 10 Mbps Half Duplex Always returns a ‘0’ for this bit because 10
Mbps Half Duplex is not supported
returns 0 0
1.10 100BASE-T2 Full
Duplex
Always returns a ‘0’ for this bit because
100BASE-T2 Full Duplex is not supported
returns 0 0
1.9 100BASE-T2 Half
Duplex
Always returns a ‘0’ for this bit because
100BASE-T2 Half Duplex is not
supported
returns 0 0
1.8 Extended Status Always returns a ‘1’ for this bit to indicate
the presence of the Extended Register
(Register 15)
returns 1 1
100BASE-T4
100BASE-X FULL DUPLEX
10Mb/s FULL DUPLEX
100BASE-T2 HALF DUPLEX
LINK STATUS
10Mb/s HALF DUPLEX
100BASE-X HALF DUPLEX
MF PREAMBLE SUPPRESSION
15 14 13 12 11 10 7 6 5 0
Reg 1
100BASE-T2 FULL DUPLEX
9
8
EXTENDED STATUS
UNIDIRECTIONAL ANILITY
4
AUTO-NEG COMPLETE
32
1
REMOTE FAULT
AUTO-NEG ABILITY
JABBER DETECT
EXTENDED CAPABILITY
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