Part Number: HD3SS3212
signal definition by Xlinx
The Aurora 8B/10B protocol uses differential signaling between ports. This section
specifies signals using peak-to-peak differential voltages. . Each signal swings between A volts and B volts. Using these waveforms, the
definitions are as follows:
1. The transmitter or receiver has a peak-to-peak range of A - B
2. The differential signal ranges from +|A−B| to -|A-B|
3. The differential peak-to-peak signal is 2 * (A−B)
Peak-to-peak is the difference between the most positive and the most negative
readings of a particular signal. In this case (A−B) −(−(A−B)) = 2*(A−B).
To illustrate this concept using real values, consider the case where a current mode logic
(CML) transmitter has a termination voltage of 2.5V and has a swing between 2.5V and
2.0V. Using these values, the peak-to-peak range is 500 mV. The differential signal ranges
between 500 mV and -500 mV. The peak differential signal is 500 mV. The differential peakto-
peak signal is 1000 mV.
