ep1sgx25d Altera Corporation, ep1sgx25d Datasheet - Page 22

• Manufacturer Part Number: ep1sgx25d
• Description: Stratix Gx Device Family Data Sheet
• Manufacturer: Altera Corporation

Figure 2–7. V
2–12
Stratix GX Device Handbook, Volume 1
Single-Ended Waveform
Differential Waveform
OD
Differential
V
CM
Programmable Pre-Emphasis
The programmable pre-emphasis module controls the output driver to
boost the high frequency components, to compensate for losses in the
transmission medium, as shown in
dynamically or statically set. There are five possible pre-emphasis
settings (1 through 5), with 5 being the highest and 0 being no
pre-emphasis.
Figure 2–8. Programmable Pre-Emphasis Model
V
ID
V
CM
V
ID
(V ID (Differential) = 2 x V ID (single-ended))
Time
Bit
V
PP
Time
V
Bit
S
Figure
V
ID
p − n = 0 V
Positive Channel (p) = V
Negative Channel (n) = V
Ground
2–8. The pre-emphasis can be
V
S
(p-p)
Altera Corporation
V
OH
PP
OL
(p-p)
June 2006