<正>介绍了字符型液晶显示控制和驱动器HD44780的特点及其工作原理。利用AT89C2 0 5 1单片机的功能特点 ,研制出显示模块与单片机AT89C2 0 5 1的接口技术。该技术使得硬件电路简化、紧凑 ,用途广泛。

Intelligent instruments based on microcontroller are playing important role in industry.As the interface between human and machines,liquid crystal devices have the characteristics of low voltage,less power consumption,large quantities of information for display and their beautiful appearance.In many fields,LCD replaces tranditial display methods.In this paper,the characteristics and work mechanism of both characters LCD and AT89C2051 are explained.The author works out an interface technique of LCD block with AT89C2051.The technique makes the connection scheme easy and brief. It is useful in practice.