Xilinx 1000BASE-X - Manual (Page 141)

Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 141
UG155 March 24, 2008
Management Registers R
Register 6: SGMII Auto-Negotiation Expansion
Register 7: SGMII Auto-Negotiation Next Page Transmit
MDIO Register 6: SGMII Auto-Negotiation Expansion
Table 9-24: SGMII Auto-Negotiation Expansion (Register 6)
Bit(s) Name Description Attributes Default Value
6.15:3 Reserved Always return 0s returns 0s 0000000000000
6.2 Next Page
Able Always returns a ‘1’ for this bit
since the device is Next Page Able returns 1 1
6.1 Page
Received 1 = A new page has been received
0 = A new page has not been
received
read only
self clearing on
read
0
6.0 Reserved Always return 0s returns 0s 0000000
NEXT P
A
GE ABLE
P
A
GE RECEIVED
RESER
VED
15 0
Reg 6
RESER
VED
3 2 1
MDIO Register 7: SGMII Auto-Negotiation Next Page Transmit
Table 9-25: SGMII Auto-Negotiation Next Page Transmit (Register 7)
Bit(s) Name Description Attributes Default Value
7.15 Next Page 1 = Additional Next Page(s) will follow
0 = Last page
read/
write
0
7.14 Reserved Always returns ‘0’ returns 0 0
7.13 Message
Page 1 = Message Page
0 = Unformatted Page
read/
write
1
NEXT P
A
GE
RESER
VED
MESSA
GE P
A
GE
15 14 13 12 11 0
Reg 7
T
OGGLE
MESSA
GE CODE
A
CKNO
WLEDGE 2
10