µVGA.com: VGA Microcontroller interface

Q: What are VGA voltage levels?

Filed under FAQ / Electrical

Answer:

HSYNC/VSYNC are TTL signals, RED/GREEN/BLUE are 0.7V peak-to-peak (0V for black level, 0.7V for full color intensity). Some monitors provide support for 1V peak-to-peak signals, but they are not standardized.