I/O Standards Support
Figure 11–4. Receiver Input Waveforms for the LVDS Differential I/O Standard
Single-Ended Waveform
Positive Channel (p) = V
OH
V
ID
Negative Channel (n) = V
OL
V
ICM
Ground
Differential Waveform (Mathematical Function of Positive & Negative Channel)
V
ID
0 V
V
V
ID
ID
p − n (1)
Note to Figure 11–4:
(1) The p – n waveform is a function of the positive channel (p) and the negative channel (n).
Figure 11–5. Transmitter Output Waveform for the LVDS Differential I/O Standard Note (2)
Single-Ended Waveform
Positive Channel (p) = V
OH
V
OD
Negative Channel (n) = V
Ground
OL
V
OS
Differential Waveform (Mathematical Function of Positive & Negative Channel)
V
OD
0 V
V
OD
p − n (2)
Notes to Figure 11–5:
(1) The VOD specifications apply at the resistor network output.
(2) The p – n waveform is a function of the positive channel (p) and the negative channel (n).
11–6
Altera Corporation
February 2007
Cyclone II Device Handbook, Volume 1
ALTERA [ ALTERA CORPORATION ]
