Xilinx 1000BASE-X - Manual (Page 125)

Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 125
UG155 March 24, 2008
Management Registers R
Register 5: Auto-Negotiation Link Partner Base
4.6 Half
Duplex Always returns a ‘0’ for this bit since Half
Duplex Mode is not supported returns 0 0
4.5 Full
Duplex 1 = Full Duplex Mode is advertised
0 = Full Duplex Mode is not advertised
read/write 1
4.4:0 Reserved Always return 0s , writes ignored returns 0s 00000
Table 9-6: Auto-Negotiation Advertisement Register (Register 4) (Continued)
Bit(s) Name Description Attributes
Default
Value
MDIO Register 5: Auto-Negotiation Link Partner Base
Table 9-7: Auto-Negotiation Link Partner Ability Base Register (Register 5)
Bit(s) Name Description Attributes
Default
Value
5.15 Next Page 1 = Next Page functionality is supported
0 = Next Page functionality is not supported
read only 0
5.14 Acknowle
dge Used by Auto-Negotiation function to indicate
reception of a link partner’s base or next page read only 0
5.13:12 Remote
Fault 00 = No Error
01 = Offline
10 = Link Failure
11 = Auto-Negotiation Error
read only 00
5.11:9 Reserved Always return 0s returns 0s 000
5.8:7 Pause 00 = No PAUSE
01 = Symmetric PAUSE
10 = Asymmetric PAUSE towards link partner
11 = Both Symmetric PAUSE and Asymmetric
PAUSE supported
read only 00
NEXT P
A
GE
A
CKNO
WLEDGE
RESER
VED
REMO
TE F
A
UL
T
HALF DUPLEX
15 14 13 12 11 7 6 5 0
Reg 5
RESER
VED
9 8
P
A
USE
4
FULL DUPLEX