3-25
3.15.2 Crossover Cable Option
Crossover type cables with pin 1 wired to pin 3 and pin 2 wired to pin 6 can be used, but
are not necessary. Crossover is automatically performed by the Ethernet PHY, resulting in
a straight-through interface to the link partner.
Table 3 - 10 10/100BASE-T Ethernet Connector Pinout
PIN FUNCTION PORT
MDI MDI-X
1 TD+ Output Input
2 TD+ Output Input
3 RD+ Input Output
4/5 GRD N/A N/A
6 RD- Input Output
7/8 GRD N/A N/A
Table 3 - 11 1000BASE-T Ethernet Connector Pinout
PIN FUNCTION DIRECTION
1 TRDA+ Input/Output
2 TRDA- Input/Output
3 TRDB+ Input/Output
4 TRDB- Input/Output
5 TRDC+ Input/Output
6 TRDC- Input/Output
7 TRDD+ Input/Output
8 TRDD- Input/Output
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