摘要
介绍了一种基于ADV7120的嵌入式VGA接口设计与实现的方法,对扫描式TFT-LCD接口时序与VGA接口时序进行了分析对比,利用S3C2440A的LCD控制器和高性能视频D/A芯片ADV7120将扫描式TFT-LCD接口转换成VGA接口,给出了转换电路原理图和LCD控制寄存器的配置方法。实验结果表明:采用这种方法可以正确输出VGA同步信号和图像数据信号,VGA显示器图像清晰稳定,满足系统要求。
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.
出处
《自动化技术与应用》
2012年第6期42-46,共5页
Techniques of Automation and Applications
基金
中国航天医学工程预先研究项目(编号2009SY54A8004)
