Design of portable video presenter based on ARM CPU S3C2440A

This paper provides the design of the portable video presenter based on ARM CPU S3C2440A and highperformanced video D/A converter ADV7120.It used Ov9650 camera with 1.3 million pixels to collect image data of object,documents,pictures,or process.While the LCD controller of S3C2440A generating the timing of VGA interface,ADV7120 transforms digit color signal to analog signal to meet VGA interface's requirement.The exact match of the TFT-LCD timing and VGA display timing make it a practical way to drive the VGA interface by LCD controller inside S3C2440.The test result proved that the design is workable and meets the basic requirement of color displaying.