2012•Techniques of Automation and ApplicationsRequires access

Design and Realization of Embedded VGA Interface based on ADV7120

Xia Lin-gen

Abstract

Design and realization of video graphics array(VGA) interface for embedded system based on ADV7120 is introduced.Timing of TFT-LCD interface and VGA interface are analysed and compared.LCD controller in S3C2440A and high-performanced video D/A converter ADV7120 are used to convert TFT-LCD interface to VGA interface.Converting circuit diagram and configuration method of LCD controller registers are putted forward.The experiment result indicates that VGA synchronized signal and image data signal are accurate by using this method and image on VGA display is clear and stable,meeting the system requirement.

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Key concepts: Video Graphics Array, Interface (matter), Realization (probability), Computer science, Computer hardware, Liquid-crystal display, Circuit diagram, Controller (irrigation)