Xilinx Virtex-4 User Manual page 145

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Table 4-16: Auto-Negotiation Next Page Transmit Register (Register 7)
Bit(s) Name
7.15 Next Page
7.14 Reserved
7.13 Message Page
7.12 Acknowledge 2
7.11 Toggle
Message or
7.10:0 Unformatted
Code Field
Table 4-17: Auto-Negotiation Next Page Receive Register (Register 8)
Bit(s) Name
8.15 Next Page
8.14 Acknowledge
8.13 Message Page
8.12 Acknowledge 2
8.11 Toggle
Message /
8.10:0 Unformatted
Code Field
Table 4-18: Extended Status Register (Register 15)
Bit(s) Name
1000BASE-X
15.15
Full Duplex
1000BASE-X
15.14
Half Duplex
1000BASE-T
15.13
Full Duplex
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Embedded Tri-Mode Ethernet MAC User Guide
UG074 (v2.2) February 22, 2010
Description
1 = Additional next page(s) follow
0 = Last page.
Always returns 0.
1 = Message Page.
0 = Unformatted Page.
1 = Complies with message.
0 = Cannot comply with message.
Value toggles between subsequent
pages.
Message code field or unformatted page
encoding as dictated by 7.13.
Description
1 = Additional Next Page(s) follow
0 = Last page.
Used by auto-negotiation function to
indicate reception of a link partner's
base or next page.
1 = Message Page.
0 = Unformatted Page.
1 = Complies with message.
0 = Cannot comply with message.
Value toggles between subsequent next
pages.
Message code field or unformatted page
encoding as dictated by 8.13.
Description
The Ethernet MAC always returns a 1
for this bit because 1000BASE-X full
duplex is supported.
The Ethernet MAC always returns a 0
for this bit because 1000BASE-X half
duplex is not supported.
The Ethernet MAC always returns a 0
for this bit because 1000BASE-T full
duplex is not supported.
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1000BASE-X PCS/PMA
Attributes Default Value
Read/Write
Returns 0
Read/Write
Read/Write
Read Only
00000000001
Read/Write
(Null Message Code)
Attributes Default Value
Read Only
Read Only
Read Only
Read Only
Read Only
Read Only
00000000000
Attributes Default Value
Returns 1
Returns 0
Returns 0
0
0
1
0
0
0
0
0
0
0
1
0
0
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