Altera DE2-115 - Page 53

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Note: The RGB data bus on DE2-115 board is 8 bit instead of 10 bit on DE2/DE2-70 board.
Figure 4-22 VGA horizontal timing specification
Table 4-14 VGA Horizontal Timing Specification
VGA mode
Horizontal Timing Spec
Configuration
Resolution(HxV)
a(us)
b(us)
c(us)
d(us)
Pixel clock(MHz)
VGA(60Hz)
640x480
3.8
1.9
25.4
0.6
25
VGA(85Hz)
640x480
1.6
2.2
17.8
1.6
36
SVGA(60Hz)
800x600
3.2
2.2
20
1
40
SVGA(75Hz)
800x600
1.6
3.2
16.2
0.3
49
SVGA(85Hz)
800x600
1.1
2.7
14.2
0.6
56
XGA(60Hz)
1024x768
2.1
2.5
15.8
0.4
65
XGA(70Hz)
1024x768
1.8
1.9
13.7
0.3
75
XGA(85Hz)
1024x768
1.0
2.2
10.8
0.5
95
1280x1024(60Hz)
1280x1024
1.0
2.3
11.9
0.4
108
Table 4-15 VGA Vertical Timing Specification
VGA mode
Vertical Timing Spec
Configuration
Resolution(HxV)
a(lines)
b(lines)
c(lines)
d(lines)
Pixel clock(MHz)
VGA(60Hz)
640x480
2
33
480
10
25
VGA(85Hz)
640x480
3
25
480
1
36
SVGA(60Hz)
800x600
4
23
600
1
40
SVGA(75Hz)
800x600
3
21
600
1
49
SVGA(85Hz)
800x600
3
27
600
1
56
XGA(60Hz)
1024x768
6
29
768
3
65
XGA(70Hz)
1024x768
6
29
768
3
75
XGA(85Hz)
1024x768
3
36
768
1
95
1280x1024(60Hz)
1280x1024
3
38
1024
1
108