DE2-70 User Manual

found on the manufacturer's web site, or in the Datasheet/VGA DAC folder on the DE2-70 System CD-ROM. The pin assignments between the Cyclone II FPGA and the ADV7123 are listed in Table

5.11.An example of code that drives a VGA display is described in Sections 6.2, 6.3 and 6.4.

Figure 5.13. 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

(640/c)

 

 

 

 

 

 

 

 

VGA(85Hz)

640x480

1.6

2.2

17.8

1.6

36

(640/c)

 

 

 

 

 

 

 

 

SVGA(60Hz)

800x600

3.2

2.2

20

1

40

(800/c)

 

 

 

 

 

 

 

 

SVGA(75Hz)

800x600

1.6

3.2

16.2

0.3

49

(800/c)

 

 

 

 

 

 

 

 

SVGA(85Hz)

800x600

1.1

2.7

14.2

0.6

56

(800/c)

 

 

 

 

 

 

 

 

XGA(60Hz)

1024x768

2.1

2.5

15.8

0.4

65

(1024/c)

 

 

 

 

 

 

 

 

XGA(70Hz)

1024x768

1.8

1.9

13.7

0.3

75

(1024/c)

 

 

 

 

 

 

 

 

XGA(85Hz)

1024x768

1.0

2.2

10.8

0.5

95

(1024/c)

 

 

 

 

 

 

 

 

1280x1024(60Hz)

1280x1024

1.0

2.3

11.9

0.4

108

(1280/c)

 

 

 

 

 

 

 

 

Table 5.9. VGA horizontal timing specification.

 

VGA mode

 

Vertical Timing Spec

 

 

 

 

 

 

 

Configuration

Resolution (HxV)

a(lines)

b(lines)

c(lines)

d(lines)

 

 

 

 

 

 

VGA(60Hz)

640x480

2

33

480

10

 

 

 

 

 

 

VGA(85Hz)

640x480

3

25

480

1

 

 

 

 

 

 

SVGA(60Hz)

800x600

4

23

600

1

 

 

 

 

 

 

SVGA(75Hz)

800x600

3

21

600

1

 

 

 

 

 

 

SVGA(85Hz)

800x600

3

27

600

1

 

 

 

 

 

 

XGA(60Hz)

1024x768

6

29

768

3

 

 

 

 

 

 

XGA(70Hz)

1024x768

6

29

768

3

 

 

 

 

 

 

XGA(85Hz)

1024x768

3

36

768

1

 

 

 

 

 

 

1280x1024(60Hz)

1280x1024

3

38

1024

1

 

 

 

 

 

 

Table 5.10. VGA vertical timing specification.

46

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Image 49
Sigma DE2-70 manual VGA horizontal timing specification