【正文】 sed on digital integrated technology is the core of the system,The software design uses module structure,C programming language. System by taking the fonts LCD12864 display data, through 4 * 4 matrix keyboard control displays text, calendar dates (year, month, day, week), time (hour, minutes and seconds), word against white, customize characters, photos. Can via keyboard adjust time, date, and press the keyboard, 7 segment digital pipe display corresponding cryogenically keys logo. First the arrangement of the content of the system hardware principle are introduced, and the hardware interface technology and the function of each interface module, Secondly, this paper expounds the program modules and realization process. Key word: MCU。 系統(tǒng)通過 帶字庫的 LCD12864 顯示數(shù)據(jù) ，通過 4*4 矩陣鍵盤控制 顯示 文字、公歷日期（年、月、日 、星期 ）、時間（時、分、秒） 文字反白、自定義字符 、圖片顯示 ，可以通過鍵盤調(diào)整時間、日期 ,溫度 ，同時 按下鍵盤時，七段數(shù)碼管顯示相應(yīng)鍵位的 鍵位標(biāo)識 。電子信息工程技術(shù) 基于單片機數(shù)字時鐘設(shè)計 摘 要 本設(shè)計以數(shù)字集成電路技術(shù)為基礎(chǔ)、單片機技術(shù)為核心。 軟件設(shè)計模塊化結(jié)構(gòu)、 C語言編程 。 在內(nèi)容 安排上首先描述系統(tǒng)硬件工作原理，著重介紹了各硬件接口技術(shù)和各個接口模塊的功能；其次，詳細(xì)闡述了程序的各個模塊和實現(xiàn)過程 。 Keyboard display the simulation system。The clock 電子信息工程技術(shù) 目 錄 引言 ......................................................................................................................................... 2 1 設(shè)計要求 ............................................................................................................................. 3 基本要求 ...................................................................................................................... 3 發(fā)揮部分 ...................................................................................................................... 3 2 方案設(shè)計與論證 ................................................................................................................. 3 控制部分方案論證 ...................................................................................................... 3 顯示部分方案論證 ...................................................................................................... 3 3 系統(tǒng)框圖及工作原理 ......................................................................................................... 4 系統(tǒng)框圖 ...................................................................................................................... 4 工作原理 ...................................................................................................................... 4 硬件工作原理 ........................................................................................................ 4 軟件工作原理 ........................................................................................................ 4 4 硬件原理分析及設(shè)計 ......................................................................................................... 5 單片機時鐘電路 .......................................................................................................... 5 單片機復(fù)位電路 .......................................................................................................... 5 復(fù)位電路的可靠性設(shè)計 ........................................................................................ 5 鍵盤電路 ...................................................................................................................... 6 顯示電路 ...................................................................................................................... 6 LCD 顯示電路 ....................................................................................................... 6 七段數(shù)碼管顯示電路 ............................................................................................ 6 整體 電路圖 .................................................................................................................. 7 系統(tǒng)硬件設(shè)計所需的元件 .......................................................................................... 8 5 軟件設(shè)計 ............................................................................................................................. 8 軟件總體設(shè)計及框圖 .................................................................................................. 8 軟件重要子程序設(shè)計及框圖 ...................................................................................... 9 顯示部分 ................................................................................................................ 9 鍵盤掃描部分 ...................................................................................................... 10 時鐘部分 .............................................................................................................. 10 延時部分 ............................................................................................................... 11 6 硬件安裝制作 ................................................................................................................... 12 PCB 板制作 ................................................................................................................ 12 元件焊接 .................................................................................................................... 12 7 電路調(diào)試 ........................................................................................................................... 12 硬件調(diào)試 .................................................................................................................... 13 軟件調(diào)試 ..................................................................................................................... 13 8 測試結(jié)果 ........................................................................................................................... 13 9 結(jié)論 ................................................................................................................................... 13 致謝 ....................................................................................................