!
!
Digital timing mode table
1 2 3 4 5 6 7
Signal name
symbol TEXT mode TEXT mode
VGA
VGA
VESA-VG
A
VESA-VG
A
VESA-VG
A
H-frequency
(kHz)
31.468 31.469 31.468 31.468 37.5 37.862 43.269
V-frequency
(Hz)
70.087 70.087 70.000 59.941 75 72.807 85.005
Pixel
rate
(MHz)
25.175 28.322 25.175 25.175 31.5 31.501 36.000
H-sync Ths
96
108
96
96 64 40 56
H-back porch
Thb
48
54
48
48 120 128 80
Count num (H-total)
Thd
800
900
800
800 840 832 832
H- front porch
Thf
16
18
16
16 16 24 56
V-sync Tvs
2
2
2
2 3 3 3
V-back porch
Tvb
60
35
35
33 16 28 25
Count num (V-total)
Tvd
449
449
449
525 500 520 509
V-front porch
Tvf
37
12
10
6 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)
350 400 400 480 480 480 480
8 9 10 11 12 13 14
Signal
name Symbol
IBM-8514A
SVGA SVGA SVGA SVGA XGA XGA
H-frequency
(kHz)
35.156 37.879 48.077 46.875 53.674 48.363 56.476
V-frequency
(Hz)
56.250 60.317 72.188 75.000 85.061 60.004 70.069
Pixel
rate
(MHz)
36.000 40.000 50.000 49.500 56.250 65.000 75.000
H-sync
Ths
72 128 120 80 64 136 136
H-back
porch Thb
128 88 64 160 152 160 144
Count
num
(H-total)
Thd
1024 1056 1040 1056 1048 1344 1328
H-
front
porch Thf
24 40 56 16 32 24 24
V-sync
Tvs
2 4 6 3 3 6 6
V-back
porch Tvb
22 23 23 21 27 29 29
Count
num
(V-total)
Tvd
625 628 666 625 631 806 806
V-front
porch
Tvf
1 1 37 1 1 3 3
!
2:
ViewSonic Corporation
Confidential – Do Not Copy
VX900-2
Содержание VX900-2
Страница 58: ...6 Mechanical Assembly 64 ViewSonic Corporation Confidential Do Not Copy VX900 2...
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