【正文】 users to accept. People have begun to use doorbell system used to replace the traditional iron keys to manage the access door, rang the doorbell so that this system has been leap of development. With the rapid development of Single Chip Microprocessor technology,people will increasingly bee an important future development direction, through the material life of the meet.It is introduced by the AT89C51 chip to a system of electronic music doorbell process. This system is mainly to plete the electronic doorbell rang the doorbell not only a mon electronic features, but also has some extensions. Its work by the state to set its own users, such as conventional capabilities, and visitors to provide the necessary response to the voice and text information, in addition, users can also visit a wide range of information enquiries.Key words: Single Chip Microprocessor。它的工作狀態(tài)能夠由用戶自行設(shè)定等常規(guī)功能，并給來(lái)訪者提供必要的語(yǔ)音和文字回應(yīng)信息，此外。隨著單片機(jī)技術(shù)的飛速發(fā)展，通過(guò)單片機(jī)實(shí)現(xiàn)人們對(duì)物質(zhì)生活的滿足，這將會(huì)日益成為今后的一個(gè)重要發(fā)展的方向。近幾年來(lái)，隨著市場(chǎng)上智能化樓宇的不斷升溫，門鈴系統(tǒng)已作為智能化辦公室和智能化住宅小區(qū)的一個(gè)重要組成部分，被各商家和用戶所接受。基于單片機(jī)的電子音樂(lè)門鈴的設(shè)計(jì)摘 要隨著時(shí)代的前進(jìn)和發(fā)展，控制智能化、儀器小型化、功耗微小化得到廣泛關(guān)注。在這些領(lǐng)域中，單片機(jī)起到了舉足輕重的作用，這就把單片機(jī)的應(yīng)用提升到重要的地位，單片機(jī)應(yīng)用系統(tǒng)設(shè)計(jì)就成為新的技術(shù)熱點(diǎn)。人們已開(kāi)始習(xí)慣用門鈴系統(tǒng)代替?zhèn)鹘y(tǒng)的鐵鑰匙去管理各通道門，這使門鈴系統(tǒng)得到了飛躍性的發(fā)展。本設(shè)計(jì)是介紹了由AT89C51單片機(jī)來(lái)構(gòu)成電子音樂(lè)門鈴系統(tǒng)的工作過(guò)程，本系統(tǒng)主要完成該電子門鈴不僅具有普通電子門鈴的功能，而且還具有一些擴(kuò)展功能。這給人們生活提供了很大的便利。Electronic doorbell。Voice recordplay目 錄引 言 ..........................................................................................................................................1 第 1 章 緒論 ....................................................................................................................................2 概述 ...........................................................................................................................................2 課題的總體設(shè)計(jì)及思路 ............................................................................................................2 第 2 章 硬件電路設(shè)計(jì) ....................................................................................................................4 硬件最小系統(tǒng)設(shè)計(jì) ...................................................................................................................4 核心芯片 AT89C51 簡(jiǎn)介 ..................................................................................................4 復(fù)位電路的設(shè)計(jì) ................................................................................................................5 時(shí)鐘電路的設(shè)計(jì) ................................................................................................................6 存儲(chǔ)器的分配 ....................................................................................................................7 時(shí)鐘電路的設(shè)計(jì) .......................................................................................................................8 DS1302 芯片簡(jiǎn)介 ..............................................................................................................8 DS1302 結(jié)構(gòu)框圖與引腳介紹 ..........................................................................................8 DS1302 與單片機(jī)的硬件電路的設(shè)計(jì) ............................................................................10 顯示提示電路的設(shè)計(jì) .............................................................................................................11 液晶顯示原理 ..................................................................................................................11 SMC1602 芯片簡(jiǎn)介 .........................................................................................................12 顯示電路的設(shè)計(jì) ...............................................................................................................14 語(yǔ)音提示電路的設(shè)計(jì) .............................................................................................................14 ISD 芯片簡(jiǎn)介 ...................................................................................................................14 ISD1420 芯片特點(diǎn)及引腳介紹 .......................................................................................15 存儲(chǔ)芯片 AT24C02 簡(jiǎn)介 ................................................................................................18 ISD1420 與單片機(jī)連接電路的設(shè)計(jì) ...............................................................................19 按鍵電路的設(shè)計(jì) .....................................................................................................................20 第 3 章 軟件部分設(shè)計(jì) ..................................................................................................................21 主程序設(shè)計(jì) .............................................................................................................................21 相應(yīng)子程序設(shè)計(jì) .....................................................................................................................22 按鍵掃描子程序設(shè)計(jì) ......................................................................................................22 門鈴鍵子程序設(shè)計(jì) ..........................................................................................................23 錄音（RECORD ）和播放（ PLAY）程序設(shè)計(jì) ...........................................................25 第 4 章 調(diào) 試 ..........................................................................................................................27 結(jié)論與展望 ....................................................................................................................................29 致 謝 ........................................................................................................................................30 參考文獻(xiàn) ........................................................................................................................................31 附錄 A：總圖 ................................................................................................................................32 附錄 B：外文文獻(xiàn)及譯文 ............................................................................................................33 附錄 C: 主要參考文獻(xiàn)及摘要 .........................