【正文】 er technology and digital display product application, produced a qualitative leap to the entire human life, in the plate for design using electronic display sports arena, with electronic digital display number, with a strong driving circuit for driving display, mainly using electronic input data number, memory also can use an external I2C munication technology for data storage, an electronic products to achieve the function to change the number of cards, now in many largescale petition in several applications, especially China39。s successful hosting of the 2020 Olympic Games, for sports more and more into the country, electronic products in the application of the sports fields will be more widely, the design of a simple change display device to meet the needs of actual substitutions, by using MCU, matrix keyboard, digital tube making clear the data have an input data, save data, either manually or automatically, save a query data, automatic standby, manually open and close digital display, status indication function venues for electronic trade the number card . Key Words: SCM technology、 memory、 digital display 無錫科技職業(yè)學院畢業(yè)設計（論文） 基于單片機的電子換號牌的設計 iii 目錄 第一章 設計的內(nèi)容及要求 .......................................................................................... 2 設計的內(nèi)容 ...................................................................................................... 2 設計的要求 ...................................................................................................... 2 第二章 設計的各部分功能介紹 .................................................................................. 3 控制部分介紹 .................................................................................................. 3 AT89C52 簡介 ..................................................................................... 3 AT89C52 的主要性能 ......................................................................... 3 AT89C52 的內(nèi)部引腳示意圖及各引腳功能 ..................................... 3 顯示模塊介紹 .................................................................................................. 4 LED 數(shù)碼管介紹 .................................................................................... 4 驅(qū)動 IC（ TD62783 和 ULN2020）介紹 ............................................. 6 矩陣鍵盤顯示的識別方法 .............................................................................. 7 矩陣鍵盤的結(jié)構(gòu)和工作原理 ................................................................ 8 矩陣鍵盤的識別方法 ............................................................................ 8 第三章 設計的原理和電路 .......................................................................................... 9 設計的概要 ...................................................................................................... 9 設計的總電路圖 .............................................................................................. 9 電源電路設計 ........................................................................................ 9 顯示電路設計 ...................................................................................... 10 按鍵部分設計 ...................................................................................... 11 存儲電路設計 ....................................................................................... 11 Proteus 功能介紹 ............................................................................................ 13 仿真電路 ........................................................................................................ 13 操作步驟 ........................................................................................................ 14 實驗結(jié)果 ........................................................................................................ 14 致謝 .............................................................................................................................. 16 參考文獻 ...................................................................................................................... 17 附錄 ....................................