智能型LED键盘显示技术及其在仪器仪表中的应用

Smart LED key and display technique and its application in the instrument and meter

对仪器仪表中普遍使用的LED键盘显示人机交互技术做了分析,给出一种由智能型LED键盘显示芯片HD7279A构成的人机交互电路。该电路具有接口简单、外围元件少,体积小,功能强的特点,使用该器件可简化仪器仪表中人机界面交互电路的设计。文中给出了HD7279A的主要特性,硬件电路及相应程序。

A kind of user and machine mutual circuit consisted of smart LED key and display chip HD7279 is given in this paper by analyzing LED key and display user and machine mutual technique used usually in instrument and meter. With simple interface, few periphery component, small cubage and doughty function characteristics, the circuit can make the design of user interface mutual circuit in instrument and meter simple. The main characteristics, hardware circuit and the corresponding program of the HD7279 are given in the paper.