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介绍了字符叠加芯片MB90 0 92的结构和主要特点 ,以及以它为核心构成的实时图像显示系统的设计方法及硬件结构框图、软件流程。该系统采用 89C5 1直接控制字符叠加芯片MB90 0 92 ,不仅软件编程简单、全中文显示 ,而且还可以设置子菜单 (用副屏显示 )使更多的信息实时叠加显示在屏幕上。
This paper introduces the structure and main features of the character superimposed chip MB90 0 92, as well as the design method of the real-time image display system and its hardware block diagram and software flow. The system uses 89C5 1 direct control character overlay chip MB90 0 92, not only simple software programming, all Chinese display, but also can set the submenu (with the secondary display) so that more information in real time overlay displayed on the screen.