【正文】 ........................................................................................... 6 MCS51系列單片機 ........................................................................................................... 7 便攜式設備的基本情況 ..................................................................................................... 9 第 3章 基于單片機的液晶顯示與鍵盤輸入 ........................................................................ 10 系統(tǒng)分析 ........................................................................................................................... 10 ................................................................................................................ 10 液晶模塊 ........................................................................................................................ 10 ..................................................................................................................... 16 ......................................................................................................................... 19 其他元器件介紹 ............................................................................................................... 20 ............................................................................................................................ 22 程序設計 ........................................................................................................................... 23 調(diào)試與運行 ....................................................................................................................... 24 結(jié)論與展望 .............................................................................................................................. 25 致 謝 .................................................................................................................................. 26 參考文獻 .................................................................................................................................. 27 附錄 A 基于單片機的液晶顯示與鍵盤實現(xiàn)的總體電路原理圖 .................................... 28 和 PCB印制電路圖 ................................................................................................................ 28 附 錄 B 一篇引用的外文文獻及其譯文 ................................................................................ 30 附錄 C 主要參考文獻的題錄及摘要 .................................................................................... 37 附錄 D 主要源程序代碼 ........................................................................................................ 39 姓名 ：基于單片機的液晶顯示與鍵盤實現(xiàn) IV 插圖 清單 圖 31 便攜式設備的基本功能模塊 ...................................................................................... 10 圖 32 液晶模塊原理圖 .......................................................................................................... 11 圖 33 SED1520 原理框圖 ..................................................................................................... 12 圖 34 SED1520 時序圖一 ..................................................................................................... 13 圖 35 SED1520 時序圖二 ..................................................................................................... 14 圖 36 SED1520 顯示 RAM 結(jié)構(gòu)圖 ..................................................................................... 14 圖 37 液晶模塊間接控制方式原理圖 .................................................................................. 16 圖 38 STC12C5404 單片機引腳結(jié)構(gòu)框圖 ........................................................................... 17 圖 39 STC12C5404單片機典型應用電路 ............................................................................ 18 圖 310 按鍵電路 .................................................................................................................... 19 圖 311 按鍵去抖程序框圖 .................................................................................................... 20 圖 312 MAX232 結(jié)構(gòu)框圖 .................................................................................................... 21 圖 313 L7805 三端穩(wěn)壓器 .................................................................................................... 21 圖 314 便攜式設備的電路圖 ................................................................................................ 22 圖 315 程序設計流程框圖 .................................................................................................... 23 安徽工程科技學院畢業(yè)設計（論文） V 表格清單 表 31 液晶的命名規(guī)則 .......................................................................................................... 10 表 32 SED1520的主要參數(shù) .................................................................................................. 12 表 3 3 SED1520的時序特性參數(shù) ......................................................................................... 13 安徽工程科技學院畢業(yè)設計（論文） 1 引 言 在 20世紀最值得人們稱道的成就中，就有集成電路和電子計算機的發(fā)展。 Portable Instruments。 關(guān)鍵詞 ：單片機；便攜式設備；液晶顯示；鍵盤 姓名 ：基于單片機的液晶顯示與鍵盤實現(xiàn) II LCD and keyboard development based on single chip Abstract For the development of microelectronics technology and the demand of the industrial measurements, portable instruments have a bright future. Portable instruments are small in size, but flexible in use. Its design is quite different from other equipment, according their special requirements of single voltage input and multi voltage output. By analyzing the typical hardware structure and the different requirements of different modules, a general method is given to solve such problems. Most of digital portable instruments are developed by using single chips. In MCU, in addition to needing particular algorithm and sensors, input and output are also necessary.