參數(shù)資料
Chapter 1: DC and Switching Characteristics for Stratix IV Devices
1–34
Switching Characteristics
March 2014
Altera Corporation
Stratix IV Device Handbook
Volume 4: Device Datasheet and Addendum
Table 1–25 through Table 1–28 lists the typical differential VOD termination settings for
Stratix IV GX and GT devices.
Table 1–29 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 1–29 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 1–25. Typical VOD Setting, TX Term = 85
Symbol
VOD Setting (mV)
0
123
45
67
VOD differential
peak-to-peak Typical (mV)
170 ±
20%
340 ±
20%
510 ±
20%
595 ±
20%
680 ±
20%
765 ±
20%
850 ±
20%
1020 ±
20%
Table 1–26. Typical VOD Setting, TX Term = 100
Symbol
VOD Setting (mV)
012
34
567
VOD differential
peak-to-peak Typical (mV)
200 ±
20%
400 ±
20%
600 ±
20%
700 ±
20%
800 ±
20%
900 ±
20%
1000
± 20%
1200
± 20%
Table 1–27. Typical VOD Setting, TX Term = 120
Symbol
VOD Setting (mV)
0123456
VOD differential
peak-to-peak Typical (mV)
240 ±
20%
480 ±
20%
720 ±
20%
840 ±
20%
960 ±
20%
1080 ±
20%
1200 ±
20%
Table 1–28. Typical VOD Setting, TX Term = 150
Symbol
VOD Setting (mV)
01
23
45
VOD differential
peak-to-peak Typical (mV)
300 ±
20%
600 ±
20%
900 ±
20%
1050 ±
20%
1200 ±
20%
1350 ±
20%
Table 1–29. Transmitter Pre-Emphasis Levels for Stratix IV Devices (Part 1 of 2)
Pre-Emphasis 1st
Post-Tap Setting
VOD Setting
0
123
4567
0
000
0000
1
N/A
0.7
00
0000
2
N/A
1
0.3
0
0000
3
N/A
1.5
0.6
0
0000
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