Data Sheet

Interconnects—Ethernet Controller I210
127
3.7.8.7.2.7 Low-Pass Filter
To aid with EMI, this filter attenuates signal components more than 180 MHz. In 1000BASE-T, the
fundamental symbol rate is 125 MHz.
3.7.8.7.2.8 Line Driver
The line driver drives the 4DPAM5 waveforms onto the four twisted-pair channels (A, B, C, D), adding
them onto the waveforms that are simultaneously being received from the link partner.
Figure 3-19. 1000BASE-T Transmit Flow And Line Coding Scheme
Figure 3-20. Transmit/Receive Flow
Scrambler Polynomials:
1 + x
13
+ x
33
(Master PHY Mode)
1 + x
20
+ x
33
(Slave PHY Mode)
D0
D1
D2
D3
D4
D5
D6
D7
GMII
Scrambler
Trellis
PAM-5
Encoded Output
to 4-Pair UTP Line
8
PAM-5
Encoder
9
4D