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EP4SE230F29I4N Datasheet, PDF (42/82 Pages) Altera Corporation – Stratix IV Device Handbook | |||
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Chapter 1: DC and Switching Characteristics for Stratix IV Devices
Switching Characteristics
1â34
Table 1â25 through Table 1â28 lists the typical differential VOD termination settings for
Stratix IV GX and GT devices.
Table 1â25. Typical VOD Setting, TX Term = 85 ï
Symbol
VOD Setting (mV)
0
1
2
3
4
5
VOD differential
170 ± 340 ± 510 ± 595 ± 680 ± 765 ±
peak-to-peak Typical (mV) 20% 20% 20% 20% 20% 20%
6
7
850 ± 1020 ±
20% 20%
Table 1â26. Typical VOD Setting, TX Term = 100 ï
Symbol
VOD Setting (mV)
0
1
2
3
4
5
6
7
VOD differential
200 ± 400 ± 600 ± 700 ± 800 ± 900 ± 1000 1200
peak-to-peak Typical (mV) 20% 20% 20% 20% 20% 20% ± 20% ± 20%
Table 1â27. Typical VOD Setting, TX Term = 120 ï
Symbol
VOD Setting (mV)
0
1
2
3
4
VOD differential
240 ± 480 ± 720 ± 840 ± 960 ±
peak-to-peak Typical (mV) 20% 20% 20% 20% 20%
5
1080 ±
20%
6
1200 ±
20%
Table 1â28. Typical VOD Setting, TX Term = 150 ï
Symbol
VOD differential
peak-to-peak Typical (mV)
0
300 ±
20%
1
600 ±
20%
VOD Setting (mV)
2
3
900 ±
20%
1050 ±
20%
4
1200 ±
20%
5
1350 ±
20%
Table 1â29 lists typical transmitter pre-emphasis levels in dB for the first post tap
under the following conditions (low-frequency data pattern [five 1s and five 0s] at
6.25 Gbps). The levels listed in Table 1â29 are a representation of possible
pre-emphasis levels under the specified conditions only and that the pre-emphasis
levels may change with data pattern and data rate.
f To predict the pre-emphasis level for your specific data rate and pattern, run
simulations using the Stratix IV HSSI HSPICE models.
Table 1â29. Transmitter Pre-Emphasis Levels for Stratix IV Devices (Part 1 of 2)
Pre-Emphasis 1st
VOD Setting
Post-Tap Setting
0
1
2
3
4
5
6
7
0
0
0
0
0
0
0
0
0
1
N/A
0.7
0
0
0
0
0
0
2
N/A
1
0.3
0
0
0
0
0
3
N/A
1.5
0.6
0
0
0
0
0
March 2014 Altera Corporation
Stratix IV Device Handbook
Volume 4: Device Datasheet and Addendum
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