Xilinx 1000BASE-X - Manual (Page 122)

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 ST
A
TUS
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 ST
A
T
US
UNIDIRECTIONAL ANILITY
4
A
U
T
O-NEG COMPLETE
3 2 1
REMO
TE F
A
UL
T
A
U
T
O-NEG ABILITY
J
ABBER DETECT
EXTENDED CAP
ABILITY