TinyVGA.com: VGA Microcontroller projects

SXGA (Mode 101) Signal 640 x 480 @ 85 Hz timing

General timing

Screen refresh rate85 Hz
Vertical refresh43.269230769231 kHz
Pixel freq.36.0 MHz

Horizontal timing (line)

Polarity of horizontal sync pulse is negative.

Scanline partPixelsTime [µs]
Visible area64017.777777777778
Front porch561.5555555555556
Sync pulse561.5555555555556
Back porch802.2222222222222
Whole line83223.111111111111

Vertical timing (frame)

Polarity of vertical sync pulse is negative.

Frame partLinesTime [ms]
Visible area48011.093333333333
Front porch10.023111111111111
Sync pulse30.069333333333333
Back porch250.57777777777778
Whole frame50911.763555555556