EDM809A液晶显示器及应用

EDM809A LCD Dislayer and Capability

在以单片机为核心构成的智能测试系统中，单片机ＣＰＵ与外接显示器的接口是一个必须处理的技术问题．具体的来说就是如何选定显示器的类型，接口的串行或并行方式问题，以及显示驱动的问题．通常８０３１、８０９８系列外接ＬＥＤ数码管及需要设计相应的并行驱动电路，这样的电路具有较烦琐而且数码管需要较高的功率消耗，ＥＤＭ８０９Ａ ６位段码液晶显示器成功的解决了单片机智能系统的显示器外接问题，ＥＤＭ８０９Ａ采用串行的工作方式，其电路结构简单，同时带有显示驱动电路；并编制了相应的软件程序用于计算机软件的接口，ＥＤＭ８０９Ａ的工作方式也适用于当前流行的２０Ｃ５１系列单片机的应用．而且液晶显示器的功耗低，适用于便携式智能仪器系统．

In the intellective measuring systems constructed by microprocessor, the interface of microprocessor's CPU to display is a problem to solve. In another words, the key problem is how to select the types of display and serial or parallel port, and the program of the display. Usually 8031 or 8098 microprocessor use LED as display and need to design drive circuit for it. This kind of circuit is very difficult and consumes high power in order to solve this problem.This paper presents the working principle and features of a 6-segment loaded LCD display named EDM809A, gives practical interface of circuit and programs software for driving. EDM80A can be applied to 80c51 microprocessor. In addition,because it needs less power, it can also be used in intellective instrument systems.