EP1SGX10DF672C6 Datasheet, PDF (22/272 Pages) Altera Corporation – Section I. Stratix GX Device Family Data Sheet

Figure 2–7. V_OD Differential
Single-Ended Waveform
V_ID
V_CM
Positive Channel (p) = V_OH
Negative Channel (n) = V_OL
Ground
Differential Waveform
V_ID
(VID (Differential) = 2 x VID (single-ended))
p−n=0V
V_ID
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 Figure 2–8. The pre-emphasis can be
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_CM
V_PP
V_S
Bit
Bit
Time
Time
2–12
Stratix GX Device Handbook, Volume 1
V_S(p-p) V_PP(p-p)
Altera Corporation
June 2006