Xilinx Virtex-4 User Manual page 141

R
Table 4-10: Control Register (Register 0) (Cont'd)
Bit(s) Name
0.11 Power Down
0.10 Isolate
Restart Auto-
0.9
Negotiation
0.8 Duplex Mode
0.7 Collision Test
Speed Selection
0.6
(MSB)
0.5:0 Reserved
Table 4-11: Status Register (Register 1)
Bit(s) Name
1.15 100BASE-T4
100BASE-X
1.14
Full Duplex
100BASE-X
1.13
Half Duplex
10 Mb/s
1.12
Full Duplex
10 Mb/s
1.11
Half Duplex
100BASE-T2
1.10
Full Duplex
100BASE-T2
1.9
Half Duplex
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Embedded Tri-Mode Ethernet MAC User Guide
UG074 (v2.2) February 22, 2010
Description
1 = Power down.
0 = Normal operation.
When set to 1, the MGT is placed in a
Low power state. This bit requires a
reset (see bit 0.15) to clear.
1 = Electrically isolate the PHY
from GMII.
0 = Normal operation.
1 = Restart auto-negotiation process.
0 = Normal operation.
The Ethernet MAC always returns a 1
for this bit to signal full-duplex mode.
The Ethernet MAC always returns a 0
for this bit to disable COL test.
The Ethernet MAC always returns a 1
for this bit. Together with bit 0.13, speed
selection of 1000 Mb/s is identified.
Always returns zeros, writes ignored.
Description
The Ethernet MAC always returns a 0
for this bit because 100BASE-T4 is not
supported.
The Ethernet MAC always returns a 0
for this bit because 100BASE-X full
duplex is not supported.
The Ethernet MAC always returns a 0
for this bit because 100BASE-X half
duplex is not supported.
The Ethernet MAC always returns a 0
for this bit because 10 Mb/s full duplex
is not supported.
The Ethernet MAC always returns a 0
for this bit because 10 Mb/s half duplex
is not supported.
The Ethernet MAC always returns a 0
for this bit because 100BASE-T2 full
duplex is not supported.
The Ethernet MAC always returns a 0
for this bit because 100BASE-T2 half
duplex is not supported.
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1000BASE-X PCS/PMA
Attributes Default Value
Read/ Write TIEEMAC#CONFIGVEC[75]
Read/Write TIEEMAC#CONFIGVEC[76]
Read/Write
Self Clearing
Returns 1
Returns 0
Returns 1
Returns 0s
Attributes Default Value
Returns 0
Returns 0
Returns 0
Returns 0
Returns 0
Returns 0
Returns 0
0
1
0
1
000000
0
0
0
0
0
0
0
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