TinyVGA.com: VGA Microcontroller projects

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

General timing

Screen refresh rate 85 Hz

Vertical refresh 43.269230769231 kHz

Pixel freq. 36.0 MHz

Polarity of horizontal sync pulse is negative.

Scanline part Pixels Time [µs]

Visible area 640 17.777777777778

Front porch 56 1.5555555555556

Sync pulse 56 1.5555555555556

Back porch 80 2.2222222222222

Whole line 832 23.111111111111

Polarity of vertical sync pulse is negative.

Frame part Lines Time [ms]

Visible area 480 11.093333333333

Front porch 1 0.023111111111111

Sync pulse 3 0.069333333333333

Back porch 25 0.57777777777778

Whole frame 509 11.763555555556