Lattice Semiconductor
10Gb Ethernet XGXS IP Core User’s Guide
Figure 14. XAUI Driver Template
A2
A1
0
-A1
-A2
0
X1
X2
1-X2
1-X1
1
Time (UI)
Symbol
X1
X2
A1
A2
Near-end Value
0.175
0.390
400
800
Far-end Value
0.275
0.400
100
800
Units
UI
UI
mV
mV
Table 17. XAUI Receive Characteristics
Parameter
Baud rate
Tolerance
Unit interval (UI) nominal
Receiver coupling
Return loss 1
Differential
Common mode
Jitter amplitude tolerance 2
Value
3.125
±100ppm
320
AC
10
6
0.65
Units
GBd
ppm
ps
dB
dB
UI p-p
1. Relative to 100 ? differential and 25 ? common mode. See IEEE
802.3ae Sec. 47.3.4.5 for input impedance details.
2. See IEEE 802.3ae Sec. 47.3.4.6 for jitter tolerance details.
28
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