【正文】 技術(shù)的飛速發(fā)展。 基于匯編語言的 51 單片機(jī)可調(diào)數(shù)字鐘的設(shè)計(jì) 6 第一章 緒論 課題 的 背景 人類跨入 21 世紀(jì)，科學(xué)技術(shù)突飛猛進(jìn)， 人民的生活發(fā)生了翻天覆地的變化。諸如定時(shí)自動(dòng)報(bào)警、按時(shí)自動(dòng)打鈴、時(shí)間程序自動(dòng)控制、定時(shí)廣播、定時(shí)啟閉電路、定時(shí)開關(guān)烘箱、通斷動(dòng)力設(shè)備，甚至各種定時(shí)電氣的自動(dòng)啟用等，所有這些，都是以 鐘表數(shù)字化為基礎(chǔ)的。 單片機(jī)模塊中最常見的是數(shù)字時(shí)鐘， 數(shù)字 時(shí) 鐘是一種用 單片機(jī)原理 實(shí)現(xiàn)時(shí)、分、秒計(jì)時(shí)的裝置 ，與機(jī)械式時(shí) 鐘相比具有更高的準(zhǔn)確性和直觀性，且無機(jī)械裝置，具有 更長的使用壽命，因此得到了廣泛的使用。 [1]微控制技術(shù)標(biāo)志著一種全新概念的出現(xiàn)。從前必須由模擬電路或數(shù)字電路實(shí)現(xiàn)的大部分功能，現(xiàn)在已能用單片機(jī)通過軟件方法來實(shí)現(xiàn)了。 目前，單片機(jī)正朝著高性能和多品種方向發(fā)展，趨勢將是進(jìn)一步向著 CMOS化、低功耗、小體積、大容量、 高性能、低價(jià)格和外圍電路內(nèi)裝化等幾個(gè)方面發(fā)展。忘記了要做的事情，當(dāng)事情不是很重要的時(shí)候，這種遺忘無傷大雅。 關(guān)鍵字 ： 單片機(jī) ； 數(shù)字鐘 ； 編程 ； 匯編語言 ； 仿真 基于匯編語言的 51 單片機(jī)可調(diào)數(shù)字鐘的設(shè)計(jì) 4 51 assembly languagebased microcontroller design Adjustable digital clock Abstract With the puter in the social sphere in recent years, the peration and the development of large scale integrated circuits, microcontroller applications are continually deepening, because of its powerful function, small size, low power consumption, cheap, reliable, easy to use, etc. therefore particularly suitable for systems with control of more and more widely used in automatic control, intelligent instruments, meters, data acquisition, military products and home appliances fields, SCM is often used as a core ponent in according to the specific hardware architecture, and objectspecific features of the software application bining to make perfect. Digital Clock is a single chip microcontroller as the core, designed on the basis of its digital clock., In their daily lives the most mon and most widely applied. Digital Clock Design of this paper is based on AT89C52 microcontroller as the core, with LED display module, the clock circuit, reset, power supply modules. The main core of the article from the hardware design and software programming are two major aspects. Hardware design using software simulation and actual circuit design, software programming in assembly language to achieve. Therefore, the study of digital clock and extend its application, has a very practical significance. Keywords: MCU； Digital Clock； ProgrammingAssembly Language； Simulation 基于匯編語言的 51 單片機(jī)可調(diào)數(shù)字鐘的設(shè)計(jì) 5 引 言 20 世紀(jì)末，電子技術(shù)獲得了飛速的發(fā)展，在其推動(dòng)下，現(xiàn)代電子產(chǎn)品幾乎滲透了社會的各個(gè)領(lǐng)域，有力地推動(dòng)了社會生產(chǎn)力的發(fā)展和社會信息化程度的提高，同時(shí)也使現(xiàn)代電子產(chǎn)品性能進(jìn)一步提高，產(chǎn)品更新?lián)Q代的節(jié)奏也越來越快。 硬件 設(shè)計(jì) 用 軟件仿真和實(shí)際 電路來實(shí)現(xiàn)， 軟件 編程 用匯編語言 來實(shí)現(xiàn)。本論文的數(shù)字鐘 設(shè)計(jì) ， 是 以 AT89C52 單片機(jī)為核心，配備 LED 顯示模塊、時(shí)鐘電路 、 復(fù)位 、電源 等功能模塊?；趨R編語言的 51 單片機(jī)可調(diào)數(shù)字鐘的設(shè)計(jì) 1 目 錄 摘要 ................................................................................................................................ 3 Abstract ......................................................................................................................... 4 引言 ................................................................................................................................ 5 第一章 緒論 .................................................................................................................. 6 課題的背景 ......................................................................................................... 6 課題的來源 .......................................................................................................... 7 課題的意義 .......................................................................................................... 7 第二章 設(shè)計(jì)目的及要求 .............................................................................................. 8 設(shè)計(jì)目的 .............................................................................................................. 8 設(shè)計(jì)要求 .............................................................................................................. 8 基本要求 ................................................................................................... 8 高級要求 ................................................................................................... 8 畢業(yè)設(shè)計(jì)作品要求 ...................................................................................... 9 第三章 系統(tǒng)方案選擇與論證 .................................................................................... 10 方案選擇 ............................................................................................................ 10 方案比較 .................................................................................................. 10 芯片的選擇 .............................................................................................. 10 方案論證 ............................................................................................................ 11 顯示模塊方案選擇與論證 .......................................................................... 11 時(shí)鐘信號方案選擇與論證 .......................................................................... 11 電路設(shè)計(jì)最終方案 .............................................................................................. 12 第四章 系統(tǒng)電路的總體方案 .................................................................................... 13 數(shù)字鐘的工作原理 .............................................................................................. 13 實(shí)現(xiàn)時(shí)鐘計(jì)時(shí)的基本方法 .......................................................................... 14 數(shù)字鐘的時(shí)間顯示 .................................................................................... 15 數(shù)字鐘的啟、停及時(shí)間調(diào)整 ...................................................................... 15 總體設(shè)計(jì) ............................................................................................................ 16 第五章 系統(tǒng)的硬件設(shè)計(jì) ............................................................................................ 17 AT89C52 單片機(jī)最小系統(tǒng) .................................................................................. 17 單片機(jī)的概念 ..................................................................................................... 17 單片機(jī)的結(jié)構(gòu) ........................................................................................... 17 單片機(jī)的功能介紹 ...............................................................................