VGA Signal 640 x 480 @ 73 Hz timing

General timing

Screen refresh rate	73 Hz
Vertical refresh	37.860576923077 kHz
Pixel freq.	31.5 MHz

Horizontal timing (line)

Polarity of horizontal sync pulse is negative.

Scanline part	Pixels	Time [µs]
Visible area	640	20.31746031746
Front porch	24	0.76190476190476
Sync pulse	40	1.2698412698413
Back porch	128	4.0634920634921
Whole line	832	26.412698412698

Vertical timing (frame)

Polarity of vertical sync pulse is negative.

Frame part	Lines	Time [ms]
Visible area	480	12.678095238095
Front porch	9	0.23771428571429
Sync pulse	2	0.052825396825397
Back porch	29	0.76596825396825
Whole frame	520	13.734603174603