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122 www.xilinx.com Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
Chapter 9: Configuration and Status
R
Register 1: Status Register
MDIO Register 1: Status Register
Table 9-4: Status Register (Register 1)
Bit(s) Name Description Attributes
Default
Value
1.15 100BASE-T4 Always returns a ‘0’ as 100BASE-T4 is not
supported.
Returns 0 0
1.14 100BASE-X Full
Duplex
Always returns a ‘0’ as 100BASE-X full
duplex is not supported.
Returns 0 0
1.13 100BASE-X Half
Duplex
Always returns a ‘0’ as 100BASE-X half
duplex is not supported.
Returns 0 0
1.12 10 Mbps Full Duplex Always returns a ‘0’ as 10 Mbps full
duplex is not supported.
Returns 0 0
1.11 10 Mbps Half Duplex Always returns a ‘0’ as 10 Mbps half
duplex is not supported
Returns 0 0
1.10 100BASE-T2 Full
Duplex
Always returns a ‘0’ as 100BASE-T2 full
duplex is not supported.
Returns 0 0
1.9 100BASE-T2 Half
Duplex
Always returns a ‘0’ as 100BASE-T2 Half
Duplex is not supported.
Returns 0 0
1.8 Extended Status Always returns a ‘1’ to indicate the
presence of the Extended Register
(Register 15).
Returns 1 1
1.7 Unidirectional
Ability
Always returns a ‘1,’ writes ignored Returns 1 1
1.6 MF Preamble
Suppression
Always returns a ‘1’ to indicate that
Management Frame Preamble
Suppression is supported.
Returns 1 1
1.5 Auto- Negotiation
Complete
1 = Auto-Negotiation process completed
0 = Auto-Negotiation process not
completed
Read only 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