ep3c120f780c8nes Altera Corporation, ep3c120f780c8nes Datasheet - Page 205

• Manufacturer Part Number: ep3c120f780c8nes
• Description: Cyclone Iii Device Family
• Manufacturer: Altera Corporation

Figure 8–14. Transmitter Output Signal Level Waveforms for PPDS
Note to
(1)
Altera Corporation-Preliminary
March 2007
The p – n waveform is a function of the positive channel (
Figure
Single-Ended Waveform
Differential Waveform (Mathematical Function of Positive & Negative Channel)
8–14:
f
V
OS
See the Cyclone III Device Datasheet: DC and Switching Characteristics
chapter in volume 2 of the Cyclone III Device Handbook for the PPDS I/O
standard electrical specification.
Figure 8–14
Designing with PPDS
Similar to RSDS and mini-LVDS, no external resistor network is required
when you use a dedicated PPDS output buffer.
PPDS I/O interface with a dedicated output buffer. For a non-dedicated
output buffer, an external resistor network is required, as shown in
Figure
shown in
V OD
8–16. The resistor values chosen should satisfy the equation
“Designing with RSDS” on page
shows the PPDS transmitter output signal waveforms.
V
OD
p
) and the negative channel (
V OD
Cyclone III Device Handbook, Volume 1
0 V
p − n (1)
High-Speed I/O Standards Support
Positive Channel (p) = V
Negative Channel (n) = V
Ground
8–10.
Figure 8–15
n
).
OH
shows the
OL
8–15