摘要：在日常生活和工作中，我們常常用到定時(shí)控制，如擴(kuò)印過(guò)程中的曝光定時(shí)等。早期常用的一些時(shí)間控制單元都使用模擬電路設(shè)計(jì)制作的，其定時(shí)準(zhǔn)確性和重復(fù)精度都不是很理想，現(xiàn)在基本上都是基于數(shù)字技術(shù)的新一代產(chǎn)品，隨著單片機(jī)性能價(jià)格比的不斷提高，新一代產(chǎn)品的應(yīng)用也越來(lái)越廣泛，大可構(gòu)成復(fù)雜的工業(yè)過(guò)程控制系統(tǒng)，完成復(fù)雜的控制功能。小則可以用于家電控制，甚至可以用于兒童電子玩具。它功能強(qiáng)大，體積小，質(zhì)量輕，靈活好用，配以適當(dāng)?shù)慕涌谛酒?，可以?gòu)造各種各樣、功能各異的微電子產(chǎn)品。數(shù)字電子鐘的設(shè)計(jì)方法有多種，例如，可用中小規(guī)模集成電路組成電子鐘，也可以利用專用的電子鐘芯片配以顯示電路及其所需要的外圍電路組成電子鐘：還可以利用單片機(jī)來(lái)實(shí)現(xiàn)電子鐘等等。這些方法都各有特點(diǎn)，其中，利用單片機(jī)實(shí)現(xiàn)的電子鐘具有編程靈活，便于電子鐘功能的擴(kuò)充，精確度高等。
關(guān)鍵詞：?jiǎn)纹瑱C(jī)、數(shù)字時(shí)鐘、程序設(shè)計(jì)



Abstract: In daily life and work, we often used for timing control, such as Print process, such as exposure time to time. Early common control unit for some time to use the analog circuit design, and its timing accuracy and repeatability are not very satisfactory, and now are basically a new generation of digital technology-based products, with the constant cost-effective single-chip increase the application of a new generation of products has become increasingly widespread, they could constitute a complex industrial process control system, the completion of complex control functions. Small appliances can be used to control, or even electronic toys for children. It is powerful, small size, light weight, flexible and easy to use, with appropriate interface chip, can construct a wide range, functions of different micro-electronics products. The design of digital electronic clock a number of means, for example, can be used integrated circuits composed of small and medium-sized electronic bell, can also use a dedicated chip with an electronic clock display circuit and its peripheral circuits needed for the composition of electronic bell: can also use a single machine to achieve the electronic bell and so on. These methods have different characteristics, which, using an electronic bell Singlechip with programming flexibility, ease of electronic bell function of the expansion of higher accuracy.
Key words: single-chip, digital clock, program design



目 錄
第1章 緒論----------------------------------------------------5
1.1課題背景--------------------------------------------------------------5
1.2課題來(lái)源--------------------------------------------------------------6
1.3本章小結(jié)--------------------------------------------------------------7
第2章 MCS-51單片機(jī)的結(jié)構(gòu)--------------------8
2.1控制器-----------------------------------------------------------------8
2.2存儲(chǔ)器的結(jié)構(gòu)-------------------------------------------------------9
2.3并行I/O口---------------------------------------------------------10
2.4時(shí)鐘電路與時(shí)序---------------------------------------------------11
2.5單片機(jī)的應(yīng)用領(lǐng)域------------------------------------------------12
2.6本章小結(jié)------------------------------------------------------------12
第3章 電路的硬件設(shè)計(jì)-----------------------------14
3.1復(fù)位電路------------------------------------------------------------14
3.2時(shí)鐘電路------------------------------------------------------------15
3.3數(shù)碼管顯示電路---------------------------------------------------15
3.4本章小結(jié)------------------------------------------------------------17
第4章 電路的軟件設(shè)計(jì)---------------------------------------18
4.1軟件程序內(nèi)容------------------------------------------------------18
第5章 電路仿真與系統(tǒng)測(cè)試---------------------------------20
第6章 結(jié)論與展望-----------------------------------------------25
6.1結(jié)論-------------------------------------------------------------------25
6.2單片機(jī)的發(fā)展趨勢(shì)-------------------------------------------------25
附錄-------------------------------------------------------------28