Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 131
UG155 March 24, 2008
Management Registers
R
Register 1: Status Register
0.9 Restart Auto-
Negotiation
Ignore this bit because Auto-Negotiation
is not included.
read/ write 0
0.8 Duplex Mode Always returns a ‘1’ for this bit to signal
Full-Duplex Mode.
returns 1 1
0.7 Collision Test Always returns a ‘0’ for this bit to disable
COL test.
returns 0 0
0.6 Speed
Selection(MS
B)
Always returns a ‘1’ for this bit. Together
with bit 0.13, speed selection of 1000
Mbps is identified
returns 1 1
0.5 Unidirectiona
l Enable
Ignore this bit because Auto-Negotiation
is not included.
read/ write 0
0.4:0 Reserved Always return 0s , writes ignored. returns 0s 00000
Table 9-14: Control Register (Register 0) (Continued)
Bit(s) Name Description Attributes
Default
Value
MDIO Register 1: Status Register
Table 9-15: Status Register (Register 1)
Bit(s) Name Description Attributes
Default
Value
1.15 100BASE-T4 Always returns a ‘0’ for this bit since
100BASE-T4 is not supported
returns 0 0
1.14 100BASE-X Full
Duplex
Always returns a ‘0’ for this bit since
100BASE-X Full Duplex is not supported
returns 0 0
1.13 100BASE-X Half
Duplex
Always returns a ‘0’ for this bit since
100BASE-X Half Duplex is not supported
returns 0 0
1.12 10 Mbps Full Duplex Always returns a ‘0’ for this bit since 10
Mbps Full Duplex is not supported
returns 0 0
1.11 10 Mbps Half Duplex Always returns a ‘0’ for this bit since 10
Mbps Half Duplex is not supported
returns 0 0
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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