【正文】 鄭州科技學(xué)院 ?？飘厴I(yè)設(shè)計(jì)（論文） 題 目 電子 時(shí)鐘 的設(shè)計(jì) 學(xué)生姓名 專業(yè)班級(jí) 學(xué) 號(hào) 所 在 系 指導(dǎo)教師 完成時(shí)間 2021 年 3 月 15 日 I 摘 要 單片機(jī)自 20 世紀(jì) 70 年代問(wèn)世以來(lái)，以其極高的性能價(jià)格比，受到人們的重視和關(guān)注，應(yīng)用很廣 、 發(fā)展很快。單片機(jī)體積小 、 重量輕 、 抗干擾能力強(qiáng) 、 環(huán)境要求不高 、價(jià)格低廉 、 可靠性高 、 靈活性好 、 開發(fā)較為容易。由于具有上述優(yōu)點(diǎn)，在我國(guó)，單片機(jī)已廣泛地應(yīng)用在工業(yè)自動(dòng)化控制 、 自動(dòng)檢測(cè) 、 智能儀器儀表 、 家用電器 、 電力電子 、機(jī)電一體化設(shè)備等各個(gè)方面，而 51 單片機(jī)是各單片機(jī)中最為典型和最有代表性的一種。這次畢業(yè)設(shè)計(jì)通過(guò)對(duì)它的學(xué)習(xí) 、 應(yīng)用，以 AT89S51 芯片為核心，輔以必要的電路，設(shè)計(jì)了一個(gè)簡(jiǎn)易的電子時(shí)鐘，它由 ，通過(guò)數(shù)碼管能夠準(zhǔn)確顯示時(shí)間，調(diào)整時(shí)間，從而到達(dá)學(xué)習(xí) 、 設(shè)計(jì) 、 開發(fā)軟 、 硬件的能力。 關(guān)鍵詞 單片機(jī) / AT89S51/數(shù)碼管 電子時(shí)鐘的設(shè)計(jì) Design of the singlechip electronics clock Abstract Single slice machine from published in 7039。s for 20 centuries, is pare with its very high function price, is value by people and pay attention to, apply very widely, develop very quickly. Single slice the machine physical volume is small,the weight is light,the anti interference ability is strong,the environment haven39。t high request,the price is cheap,the credibility is high,vivid good,develop more easy. In order to having an abovementioned advantage, at the our country, single slice the machine is broadly applied already to turn an equipment at industrial automation control,automatic examination,intelligence instrument appearance,home appliances,electric power electronics,the machine electricity integral whole etc. each aspect, but 51 machines is is a typical model most and have a representative most in each machine of a kind. This graduation design passes to its study and application, Take the AT89S51 chips as core, assist with the electric circuit of the necessity, design a simple electronics clock, it from the V direct current power supply power supply, pass the figures tube can accurate manifestation time, adjust time。 Arrive a study and design, develop thus soft,the ability of the hardware . KEY WORDS SCM, AT89C2051, digital displays I 目 錄 摘 要 ........................................................................................................................ I Abstract.......................................................................................................................... II 目 錄 .............................................................................................................................. I 1 引言 .......................................................................................................................... I 2 關(guān)于電子時(shí)鐘 ........................................................................................................III 電子時(shí)鐘簡(jiǎn)介 ............................................................................................III 電子時(shí)鐘的基本特點(diǎn) .................................................................................III 電子時(shí)鐘的原理 .........................................................................................III 3 關(guān)于單片機(jī) ........................................................................................................... IV 單片機(jī)簡(jiǎn)介 ................................................................................................ IV 單片機(jī)的發(fā)展史 ........................................................................................ IV 4 位單片機(jī) .................................................................................... IV 8 位單片機(jī) .................................................................................... IV 16 位單片機(jī) ....................................................................................V 32 位單片機(jī) ....................................................................................V 64 位單片機(jī) ....................................................................................V 單片機(jī)的特點(diǎn) ..............................................................................................V 4 方案 論證與比較 .................................................................................. VII 數(shù)字時(shí)鐘方案 ........................................................................................... VII 5 系統(tǒng)設(shè)計(jì) ............................................................................................................... IX 總體設(shè)計(jì) .................................................................................................... IX 計(jì)時(shí)方案 ....................................................................................... IX 控制方案 ....................................................................................... IX 具體設(shè)計(jì)分析 ............................................................................... IX 模塊設(shè)計(jì) ..................................................................................................... X 芯片分析 ........................................................................................... X 電子時(shí)鐘的設(shè)計(jì) AT89S51 芯片 ............................................................................. X ： RD，外部數(shù)據(jù)存儲(chǔ)器的讀取信號(hào)。 ........................................... XIII 74LS47 ................................................................................... XIII 74LS138 ...................................................................................XIV 晶振電路 ...............................................................................................XVI 圖 3 晶振電路 ...........................................................................................XVI 復(fù)位電路 ............................................................................................. XVII 數(shù)碼顯示模塊設(shè)計(jì) ............................................................................. XVII 按鍵模塊 .............................................................................................. XVIII 整個(gè)電路原理圖 ..........