AV-51002
2015.12.16
1-39
Transmitter Pre-Emphasis Levels
For example, when VOD = 800 mV, the corresponding VOD value setting is 40. The following conditions show that the 1st post tap pre-emphasis
setting = 2 is valid:
• |B| + |C| ≤ 60→ 40 + 2 = 42
• |B| – |C| > 5→ 40 – 2 = 38
• (VMAX/VMIN – 1)% < 600%→ (42/38 – 1)% = 10.52%
To predict the pre-emphasis level for your specific data rate and pattern, run simulations using the Arria V HSSI HSPICE models.
Table 1-33: Transmitter Pre-Emphasis Levels for Arria V Devices
Quartus Prime 1st
Post Tap Pre-
Emphasis Setting
Quartus Prime VOD Setting
Unit
10 (200 mV)
20 (400 mV)
30 (600 mV)
35 (700 mV)
40 (800 mV)
45 (900 mV) 50 (1000 mV)
0
1
0
1.97
3.58
5.35
7.27
—
0
0
0
0
0
0
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
dB
0.88
1.67
2.48
3.31
4.19
5.08
5.99
6.92
7.92
9.04
10.2
11.56
12.9
14.44
—
0.43
0.95
1.49
2
0.32
0.76
1.2
0.24
0.61
1
0.19
0.5
0.13
0.41
0.69
0.96
1.26
1.56
1.87
2.11
2.46
2.77
—
2
3
0.83
1.14
1.49
1.83
2.18
2.48
2.87
3.23
3.61
3.97
4.36
4.76
5.14
4
1.63
2.1
1.36
1.76
2.17
2.58
2.93
3.38
3.79
4.23
4.68
5.12
5.57
6.06
5
2.55
3.11
3.71
4.22
4.86
5.46
6.09
6.74
7.44
8.12
8.87
6
—
2.56
3.06
3.47
4
7
—
8
—
9
—
10
11
12
13
14
15
—
4.51
5.01
5.51
6.1
—
—
—
—
—
—
6.64
7.21
—
—
—
Arria V GX, GT, SX, and ST Device Datasheet
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