①頁數(shù) 29
②字?jǐn)?shù) 9829
③摘要
摘 要
　　　電子科技日新月異，人們對現(xiàn)代電子設(shè)備的智能化和微型化及其精度提出了更高的要求，而單片機(jī)因其具有穩(wěn)定可靠、 體積小、 價格低廉等特點，成為設(shè)計智能化儀器儀表的首選微控制器，因此本次我們沒有選用傳統(tǒng)的專用的時鐘芯片，而是采用了AT89S51芯片[1] [2] [3]，此款單片機(jī)可以使用軟件對其進(jìn)行在線編程，其靈活性和可靠性都相對提高。    通過此次實物制作,增強(qiáng)了我們的動手能力,把理論與實踐融合在一起。同時，也進(jìn)一步加深了對單片機(jī)的硬件結(jié)構(gòu)的理解和鞏固，編程能力也得到了提高。在此將電子鐘制作過程中用到的知識進(jìn)行了一些總結(jié)，并記錄了遇到的問題，希望自己今后能注意。同時也希望能成為讀者的參考資料，能幫助讀者避免出現(xiàn)相同的問題，并能從中得到一些啟發(fā)。    在此要感謝王老師對我的指導(dǎo)，感謝同組人的合作及幫助過我的同學(xué)。由于編者水平有限,書中的錯漏在所難免，懇請讀者批評指正。

關(guān) 鍵 詞：單片機(jī);電子鐘;時鐘芯片

Abstract     Electronic technology with each passing day, people are intelligent and modern electronic equipment, miniaturization and precision put forward higher requirements, while the microcontroller because of its stability and reliability, small size, low price and so has become the preferred design of intelligent instruments and meters micro - controller, so this we did not use a traditional dedicated clock chip, instead of using the AT89S51 chip that this section you can use the software for its microcontroller-line programming, its flexibility and reliability increases.     With this in-kind production, to enhance our hands-on ability to bring theory and practice together. At the same time also further deepened the understanding of microcomputer hardware architecture and consolidation of programming skills has also been improved. In this electronic clock used in the production process knowledge in a number of summary and record of the problems encountered, I hope to be able to pay attention in the future. We also hope to become the reader's reference, can help readers avoid the same problems, and get some inspiration from.     Wish to thank Mr. Wang to guide me, thank the same group of people co-operation and helped my classmates. Since add is limited, the book's mistakes are bound to appeal to readers to criticize the correction.
Key words:SCM; electronic clock;the clock chip;the design

目錄
1.簡易電子鐘總體方案的選擇 1
1.1計時方案 1
1.2鍵盤/顯示方案 1
2.簡易電子鐘的工作原理 2
2.1實現(xiàn)時鐘計時的基本方法 2
2.2 簡易電子鐘的時間顯示 2
2.3 簡易電子鐘的啟、停及時間調(diào)整 2
3.部分電路及芯片介紹 3
3.1 電源的設(shè)計 3
3.1.1 各部分簡介 3
3.1.2 電源的設(shè)計 4
3.1.3 器件的介紹 4
3.2  AT89S52芯片 5
3.2.1 AT89S52單片機(jī)的特點 5
3.2.2管腳、引線與功能 6
3.2.3總線結(jié)構(gòu) 7
3.2.4電源電路介紹 7
3.3 復(fù)位電路 7
3.3.1 復(fù)位電路圖 8
3.3.2 復(fù)位電路工作原理 8
3.4 時鐘電路 8
3.4.1 時鐘振蕩電路圖 8
3.4.2 時鐘信號的產(chǎn)生 8
3.5 鍵盤接口電路和顯示電路 9
3.5.1 鍵盤接口電路 9
4.簡易電子鐘元件清單 9
5.軟件設(shè)計 10
5.1.電子鐘程序流程框圖 11
6.簡易電子鐘的使用說明 12
7.誤差分析 12
8.設(shè)計體會 13
參考資料 14
致謝 14
附錄 15

⑤關(guān)鍵字
單片機(jī)，電子鐘，時鐘芯片
SCM;，electronic clock;the clock chip;the design
⑥參考文獻(xiàn)
[1] 曹巧媛.單片機(jī)原理及應(yīng)用[M].北京.電子工業(yè)出版社.1997.7.
[2] 趙秀珍,單永磊.單片微型計算機(jī)原理及其應(yīng)用[M].北京.中國水利水電出版社.2001.8.
[3] 張毅剛,修林成,胡振江.MCS-51單片機(jī)應(yīng)用設(shè)計[M].哈爾濱.哈爾濱工業(yè)大學(xué)出版社.1990.8.
[4] 張洪潤,蘭清華.單片機(jī)應(yīng)用技術(shù)教程[M].北京.清華大學(xué)出版社.1997.11.
[5] 李華.MCS-51系列單片機(jī)實用接口技術(shù) [M].北京.北京航空航天大學(xué)出版社.1993.8.