NEC LCD1280 - Manual (Page 10)

Signal Timings
Input Signal Timings (WS High Resolution Mode)
Item Abbreviation Monitor Rating
Pixel frequency
fc 107.5MHz ± 50ppm 9.302nsec/pixel 107.352HHz ± 50ppm 9.315nsec/pixel
Horizontal frequency fh 64.60KHz 63.9KHz
Line Time total Th 15.479usec 1664CLK 15.649esec 1680CLK
Horizontal active display
Thd 11.907usec 1280CLK 11.923usec 1280CLK
Horizontal sync pulse Thp 1.786usec 192CLK 1.118usec 120CLK
Horizontal baack porch Thb 1.488usec 160CLK 2.329usec 250CLK
Horizontal front porch
Thf 0.298usec 32CLK 0.279usec 30CLK
H-sync Rise & Fall Thrf 5ns(max.)
Vertical frequency fv 59.93Hz 60.0Hz
Frame time total
Tv 16.686msec 1078H 16.667msec 1065H
Vertical active display Tvd 15.850msec 1024H 16.025msec 1029H
Vertical sync pulse Tvp 0.062msec 4H 0.047msec 3H
Vertical back porch
Tvb 0.666msec 43H 0.548msec 35H
Vertical front porch
Tvf 0.108msec 7H 0.047msec 3H
IMPORTANT: The Jitter on Hsync output from video card should be less than 300 psec or you may see some jitter on the screen.
Appendix 2
Input Signal Timings (VGA Mode)
(The values of Front & Back porch are for reference only)
Item Abbreviation Monitor Rating
Pixel frequency
fc 25.175MHz ± 50ppm 39.72nsec/pixel
Horizontal frequency fh 31.469KHz
Line Time total Th 31.778usec 800CLK
Horizontal active display
Thd 25.422usec 640CLK
Horizontal sync pulse Thp 3.813usec 96CLK
Horizontal back porch Thb 1.907usec 48CLK
Horizontal front porch
Thf 0.636usec 16CLK
Vertical frequency fv 59.94Hz
Frame time total Tv 16.683msec 525H
Vertical active display
Tvd 15.253msec 480H
Vertical sync pulse Tvp 0.063msec 2H
Vertical back porch Tvb 1.017msec 32H
Vertical front porch
Tvf 0.350msec 15H
IMPORTANT: The Jitter on Hsync output from video card should be less than 300 psec or you may see some jitter on the screen.
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LCD1280 10/29/99 9:25 AM Page 10