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APPENDIX A : PRESET TIMING CHART
Analog Mode
1 2 3 4 5
6
7
Signal name
symbol
TEXT
mode
TEXT
mode
VGA MAC-II VESA-VGA
VESA-VGA VESA-VGA
H-frequency (kHz)
31.468
31.469
31.468
35.001
37.5
37.862
43.269
V-frequency (Hz)
70.087 70.087
59.941
66.667
75
72.807
85.005
Pixel rate (MHz)
25.175 28.322
25.175
30.240
31.5
31.501
36.000
H-sync Ths
96 108 96 64 64
40
56
H-back porch
Thb
48 54 48 96 120 128
80
Count num (H-total)
Thd
800 900 800 864 840
832
832
H- front porch
Thf
16 18 16 64 16
24
56
V-sync Tvs
2 2 2 3 3
3
3
V-back porch
Tvb
60 35 33 39 16
28
25
Count num (V-total)
Tvd
449 449 525 525 500
520
509
V-front porch
Tvf
37 12 10 3
1
9
1
H-sync. Polarity
Positive Negative Negative Negative
Negative
Negative
Negative
V-sync Polarity
Negative Positive Negative Negative
Negative
Negative
Negative
H-resolution (dots)
640 720 640 640 640
640
640
V-resolution (lines)
350 400 480 480 480
480
480
8 9 10 11 12 13 14
Signal name
Symbol
IBM-8514
A
SVGA SVGA SVGA SVGA MAC
16"
XGA
H-frequency
(kHz)
35.156 37.879
48.077
46.875 53.674 49.725 48.363
V-frequency (Hz)
56.250
60.317
72.188
75.000
85.061
74.5
60.004
Pixel rate (MHz)
36.000
40.000
50.000
49.500
56.250
57.283
65.000
H-sync
Ths 72 128
120 80 64 64 136
H-back
porch
Thb 128 88 64 160 152 224 160
Count num (H-total)
Thd
1024
1056
1040
1056
1048
1152
1344
H- front porch
Thf
24
40
56
16
32
32
24
V-sync
Tvs
2 4 6 3 3 3 6
V-back
porch
Tvb 22 23 23 21 27 39 29
Count num (V-total)
Tvd
625
628
666
625
631
667
806
V-front
porch Tvf
1 1 37 1 1 1 3
H-sync. Polarity
Negative
Positive
Positive
Positive
Positive Negative
Negative
V-sync Polarity
Negative
Positive
Positive
Positive
Positive Negative
Negative
H-resolution
(dots)
800 800 800 800 800 832 1024
V-resolution
(lines)
600 600 600 600 600 624 768
9
ViewSonic
Corporation
Co
nfidential
-
Do
Not
Copy
VG910s/b
Summary of Contents for VG910b-1
Page 30: ...6 6 Figure of Waveform 27 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
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Page 55: ...52 ViewSonic Corporation Confidential Do Not Copy VG910s b 10 Schematic Diagrams ...
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Page 64: ...61 ViewSonic Corporation Confidential Do Not Copy VG910s b ...
Page 65: ...62 ViewSonic Corporation Confidential Do Not Copy VG910s b 11 PCB Layout Diagrams Main Board ...
Page 66: ...63 ViewSonic Corporation Confidential Do Not Copy VG910s b Main Board ...
Page 67: ...64 ViewSonic Corporation Confidential Do Not Copy VG910s b Power Board ...
Page 68: ...65 ViewSonic Corporation Confidential Do Not Copy VG910s b Control Board ...