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EP4CE10F17C8N Datasheet, PDF (22/42 Pages) Altera Corporation – Cyclone IV Device Datasheet | |||
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1â22
Chapter 1: Cyclone IV Device Datasheet
Switching Characteristics
Figure 1â4 shows the differential receiver input waveform.
Figure 1â4. Receiver Input Waveform
Single-Ended Waveform
VID
VCM
Positive Channel (p)
Negative Channel (n)
Ground
Differential Waveform
VID
VID (diff peak-peak) = 2 x VID (single-ended)
pân=0V
VID
Figure 1â5 shows the transmitter output waveform.
Figure 1â5. Transmitter Output Waveform
Single-Ended Waveform
VCM
VOD
Positive Channel (p)
Negative Channel (n)
Ground
Differential Waveform
VOD
VOD (diff peak-peak) = 2 x VOD (single-ended)
pân=0V
VOD
Table 1â22 lists the typical VOD for Tx term that equals 100 ï.
Table 1â22. Typical VOD Setting, Tx Term = 100 ï
Symbol
1
2
VOD differential peak
to peak typical (mV)
400
600
Note to Table 1â22:
(1) This setting is required for compliance with the PCIe protocol.
VOD Setting (mV)
3
4 (1)
800
900
5
1000
6
1200
Cyclone IV Device Handbook,
Volume 3
October 2012 Altera Corporation
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