Altera Cyclone IV Device Handbook page 468

1–22
Figure 1–4
Figure 1–4. Receiver Input Waveform
Single-Ended Waveform
Differential Waveform
Figure 1–5
Figure 1–5. Transmitter Output Waveform
Single-Ended Waveform
Differential Waveform
Table 1–22
Setting, Tx Term = 100 
Table 1–22. Typical V
OD
Symbol
V differential peak
OD
to peak typical (mV)
Note to Table 1–22:
(1) This setting is required for compliance with the PCIe protocol.
Cyclone IV Device Handbook,
Volume 3
shows the differential receiver input waveform.
V
ID
V
CM
V
ID
shows the transmitter output waveform.
V
OD
V
CM
V
OD
lists the typical V
OD
1 2
400 600
Positive Channel (p)
Negative Channel (n)
Ground
V ID (diff peak-peak) = 2 x V ID (single-ended)
p − n = 0 V
V
ID
Positive Channel (p)
Negative Channel (n)
Ground
V OD (diff peak-peak) = 2 x V OD (single-ended)
p − n = 0 V
V
OD
for Tx term that equals 100  .
V Setting (mV)
OD
(1)
3 4
800 900
Chapter 1: Cyclone IV Device Datasheet
Switching Characteristics
5 6
1000 1200
December 2016 Altera Corporation