点阵液晶模块与LPC2214的接口方式研究与编程

Study and Programming on Interface Mode of Dot Matrix LCD Module and LPC2214

该文从应用角度叙述了常规的液晶显示模块YM19264C的结构特点和基本功能,并在YM19264C和ARM嵌入式微控制器LPC2214时序分析的基础上,讨论了ARM嵌入式微处理器LPC2214与点阵液晶显示模块组成的硬件电路的设计方法,设计了以I/O模拟总线连接液晶模块和外部存储器接口扩展液晶模块两种应用电路,而且对两种接口方式下的程序设计进行了分析,同时,给出了屏幕显示不正常时一个简单的解决办法。

The structural characteristics and basic functions of conventional dot matrix LCD module YM19264C are introduced from the application point of view,and the design method of the hardware circuit composed by ARM embedded microprocessor LPC2214 and dot matrix LCD module is discussed based on the timing analysis of YM19264C and ARM embedded microprocessor LPC2214.In addition,two application circuits of LCD modules are also designed,including one linked by I/O as bus and the other extended by external memory controller,and carried on the analysis of program designs in two interface modes.The paper finally proposes a simple solution for abnormal screen display.