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Preset Timing Chart & Reference Timing Table
Model no. 1 2 3 4 5 6 7
Model name EGA/70 EGA/85 VGA VGA VGA VGA VESA
Horizontal dots 640 640 640 640 640 640 800
Vertical lines 350 350 480 480 480 480 600
Pixel clock (mhz) 25.175 31.5 25.175 31.5 31.50 36 36
Horizontal freq
(khz)
31.469 37.861 31.469 37.861 37.5 43.269 35.156
Sync. Polarity + + - - - - +
A h.total (us)
(pixels)
31.778
(800)
(832) 31.778
(800)
832 26.667
(840)
23.111
(832)
1024
B h.sync
(us)(pixels)
3.813
(96)
(64) 3.813
(96)
40 2.032
(64)
1.556
(56)
72
C h.back porch
(us) (pixels)
1.907
(48)
(96) 1.907
(48)
128 3.810
(120)
2.222
(80)
128
D h.active
(us) (pixels)
25.422
(640)
(640) 25.422
(640)
640 20.317
(640)
17.778
(640)
800
E h.front porch
(us) (pixels)
(16) (32) 0.318
(16)
24 0.508
(16)
1.556
(56)
24
Vertical freq (hz) 70.087 85.08 59.94 72.809 75 85.008 56.25
Sync. Polarity - - - - - - +
O v.total (ms)
(lines)
14.268
(449)
(445) 16.684
(525)
520 13.333
(500)
11.764
(509)
625
P v.sync
(ms) (lines)
0.064
(2)
(3) 0.064
(2)
3 0.080
(3)
0.069
(3)
2
Q v.back porch
(ms) (lines)
1.112
(60)
(60) 1.048
(33)
28 0.427
(16)
0.578
(25)
22
R v.active (ms)
(lines)
11.122
(350)
(350) 15.254
(480)
480 12.800
(480)
11.093
(480)
600
S v.front porch
(ms) (lines)
0.222
(37)
(32) 0.318
(10)
9 0.027
(1)
0.023
(1)
1