摘要
为了解决由于人机界面中的键盘、显示器等慢速外设占用系统资源太多,从而造成处理速度下降、系统可靠性降低的问题,介绍一种具有I2C接口的智能控制芯片ZLG7289,并给出以AT89C52为核心、ZLG7289为人机界面的数控信号源的硬件电路和软件设计方法。该设计硬件电路简单,耗电小,软件设计无需进行显示译码,从而省去静态显示扩展芯片,节省了CPU的占用时间。
The paper introduces the smart keyboard and displayer chip ZLG7289 possessing I^2C interface, the circuit and the programming method of the numerical control signal source using AT89c51 as core chip, using ZLG7289 keyboard and sbow chip as human - computer interface to solve the problem of rate dropping and the reliability reducing of system because of the keyboard and displayer occupying too many resources. The design has some merits such as simple circuit,low power consumption,and the static state display chip doesn＇t need,the occupation time to CPU is reduced because of the display and decode not be omitted in Soft design.
出处
《现代电子技术》
2008年第23期124-126,共3页
Modern Electronics Technique
基金
渭南师范学院重点科研资助项目(06YKF012)
