基于MSP430F4250的可编程高精度两线制显示模块设计  

Design of Programmable High-precision Two-wire Display Module Based on MSP430F4250

作　　者：梁伟[1] 

机构地区：[1]绍兴文理学院电工电子实验教学中心,浙江绍兴132000

出　　处：《化工自动化及仪表》2010年第4期54-56,60,共4页Control and Instruments in Chemical Industry

摘　　要：以MSP430F4250为核心,配合高效率的升压式DC/DC微功率电源,设计了一款高精度的两线制显示模块。使用专门设计的段式LCD,支持-1999~9999范围的线性或者平方根数字显示,支持℃、%、Pa、kPa、MPa、m及m3等多种物理量的显示。在4~20 mA供电时,精度优于0.03%。工作仅需2.2 V低电压差,同时能够为LCD提供高亮度背光。asing on MSP430F4250 display module and step-up DC/DC micro-power supply,a two-wire LCD display panel was designed to display linear signal range from 1999-9999 or the square root one,units and measurement symbols such as ℃、%、Pa、 kPa、MPa、m and m3.The display precision reached 0.03% above when the power supply current changed at 4~20mA.It can work with a voltage difference of 2.2V and give high backlighting.

关 键 词：两线制显示模块 微功率电源 低成本 高精度 低电压差 

分 类 号：TH85[机械工程—仪器科学与技术]