Xilinx LogiCORE 1000BASE-X User Manual page 140

R
Register 5: SGMII Auto-Negotiation Link Partner Ability
The Auto-Negotiation Ability Base Register (Register 5) contains information related to the
status of the link between the PHY and its physical link partner across the Medium.
Table 9-23: SGMII Auto-Negotiation Link Partner Ability Base (Register 5)
140
MDIO Register 5: SGMII Auto-Negotiation Link Partner Ability
15 14 13 12 11
Reg 5
Bit(s) Name
5.15 PHY Link This refers to the link status of the PHY with its
Status link partner across the Medium.
1 = Link Up
0 = Link Down
5.14 Acknowle Used by Auto-Negotiation function to indicate
dge reception of a link partner's base or next page
5.13 Reserved Always returns '0,' writes ignored
5.12 Duplex 1= Full Duplex
Mode
0 = Half Duplex
5.11:10 Speed 11 = Reserved
10 = 1 Gbps
01 = 100 Mbps
00 = 10 Mbps
5.9:1 Reserved Always return 0s
5:0 Reserved Always returns '1'
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Chapter 9: Configuration and Status
10 9
Description
Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
1 0
Default
Attributes
Value
read only 1
read only 0
returns 0 0
read only 0
read only 00
returns 0s 000000000
returns 1 1
UG155 March 24, 2008