4.5Video Signal On 
The sequence for bringing up and removal of each video input signal can be in any sequence or combination of input signals.
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  | Video Modes  | 
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  | IBM VGA | VESA | ||
Resolution | 640x400 | 640x480 | 800x600 | 1024x768 | 
Video Clock | 25.175 MHz  | 25.175 MHz  | 50.000 MHz  | 75.000 MHz  | 
Horizontal Scan | 
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Freq. | 31.468 KHz  | 31.468 KHz  | 48.077 KHz  | 56.476 KHz  | 
Horizontal Line | 31.778 us 800  | 31.778 us 800  | 20.800 us 1040  | 17.707 us 1328  | 
Period | pixels  | pixels  | pixels  | pixels  | 
Horizontal | 
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Blanking | 6.356 us 160 pixels  | 6.356 us 160 pixels  | 4.800 us 240 pixels  | 4.053 um 304 pixels  | 
Horizontal Sync | 
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Pulse | 3.813 us 96 pixels  | 3.813 us 96 pixels  | 2.400 us 120 pixels  | 1.813 us 136 pixels  | 
Horizontal Front | 
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Porch | 0.636 us 16 pixels  | 0.636 us 16 pixels  | 1.120 us 56 pixels  | 0.320 us 24 pixels  | 
Horizontal Back | 
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Porch | 1.907 us 48 pixels  | 1.907 us 48 pixels  | 1.280 us 64 pixels  | 1.920 us 144 pixels  | 
Horizontal Active | 
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  | 13.653 us 1024  | 
Display | 25.422 us 640 pixels  | 25.422 us 640 pixels  | 16.000 us 800 pixels  | pixels  | 
Horizontal Sync | 
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Polarity | -  | -  | -  | -  | 
Vertical Scan Freq. | 70.087 Hz  | 59.94 Hz  | 72.184 Hz  | 70.069  | 
Vertical Frame | 
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Period | 14.268 ms 449 lines  | 16.683ms 525 lines  | 13.853 ms 666 lines  | 14.272 ms 806 lines  | 
Vertical Blanking | 1.557 ms 49 line  | 1.430 ms 45 line  | 1.373 ms 66 lines  | 0.673 ms 38 lines  | 
Vertical Sync Pulse | 0.064 ms 2 lines  | 0.064 ms 2 lines  | 0.125 ms 6 lines  | 0.106 ms 6 lines  | 
Vertical Front | 
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Porch | 0.381 ms 12 lines  | 0.318 ms 10 lines  | 0.770 ms 37 lines  | 0.053 ms 3 lines  | 
Vertical Back Porch | 1.112 ms 35 lines  | 1.049 ms 33 lines  | 0.478 ms 23 lines  | 0.514 ms 29 lines  | 
Vertical Active | 
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Display | 12.711 ms 400 lines  | 15.254 ms 480 lines  | 12.480 ms 600 lines  | 13.599 ms 768 lines  | 
Vertical Sync  | 
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Polarity  | -  | -  | -  | -  | 
Note: VGA border is not included in the Active Display time described above.
Title: Product Specification: LC12   | Page 13 of 24  | 
Document Number:   | Revision: A  |