Altera Cyclone IV - Page 468

1–22 Chapter 1: Cyclone IV Device Datasheet
Switching Characteristics
Cyclone IV Device Handbook, December 2016 Altera Corporation
Volume 3
Figure 1–4 shows the differential receiver input waveform.
Figure 1–5 shows the transmitter output waveform.
Table 1–22 lists the typical V
OD
for Tx term that equals 100 .
Figure 1–4. Receiver Input Waveform
Single-Ended Waveform
Differential Waveform V
ID
(diff peak-peak) = 2 x V
ID
(single-ended)
Positive Channel (p)
Negative Channel (n)
Ground
V
ID
V
ID
V
ID
p − n = 0 V
V
CM
Figure 1–5. Transmitter Output Waveform
Single-Ended Waveform
Differential Waveform V
OD
(diff peak-peak) = 2 x V
OD
(single-ended)
Positive Channel (p)
Negative Channel (n)
Ground
V
OD
V
OD
V
OD
p − n = 0 V
V
CM
Table 1–22. Typical V
OD
Setting, Tx Term = 100 
Symbol
V
OD
Setting (mV)
1234
(1)
56
V
OD
differential peak
to peak typical (mV)
400 600 800 900 1000 1200
Note to Table 1–22:
(1) This setting is required for compliance with the PCIe protocol.