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5
82575 Ethernet Controller Design Guide
Figure 1. Lane Reversal supported modes
Configuration bits: EEPROM "Lane reversal disable" bit - disables lane reversal
altogether
2.4 PCI Express Routing
For information regarding the PCIe signal routing, please refer to the Intel PCIe Design
Guide. Contact your Intel representative for information.
3 2 1 0
0 1 2 3
x4
x4
ٛ
x2
3 2 0
Lane Reversal in x4 mode
Lane Reversal in x2 mode
x x 1 0x2
3 2 1 0
0 1x x
0x x
Reversal
Reversal
x2 ٛ
x1
x2 ٛ
x1
x
x4
ٛ
x1
3 2 1 0
0 1 2 3
x4 ٛ
x1
1
x1
x2
x1