【正文】 單片機主控制為核心，采用了美國 ISD 公司制造的 ISD4004 語音芯片實現(xiàn)錄放系統(tǒng)的功能。系統(tǒng)模塊包括主程序模塊、語音信號的采集模塊、鍵盤掃描模塊、語音信號存儲模塊的設計等，進行了程序流程的設計，編寫了程序代碼。關鍵詞：單片機　錄音　放音　 數碼錄音筆 AbstractWith the rapid development of electronic technology, digital voice recorder has been more and more people have favored paper on the design of a variety of voice recorder were pared and analyzed, the selected SCM AT89C52 designed a digital voice recorder. This paper is proposed based on STC89C52 SCM and ISD4004 pronunciation chip voice storage and playback design scheme. Firstly introduces the selection of design scheme, then the hardware design, including audio input/output circuit design, button control circuit design, liquid crystal display circuit design, design with AT89C52 single chip puter master control as the core, using America ISD panies manufacture of ISD4004 pronunciation chip realizing the function of recording system. One button control circuit to control the whole system, display circuit with a digital tube more intuitive recording playback, audio amplifier circuit amplifier using universal model LM386 audio amplifier to realize. System modules including main program module, speech signal acquisition module, the keyboard scan module, speech signal storage module design, the design of the program flow and write program code. System realizes the speech data recorded, play, pause, looping, aired, choose a long, choosing the next paragraph and use digital tube and led to display relevant operating functions such as design has certain, the application valueKeyword: Microcontroller　 Ｒecording 　 Ｐl(wèi)ayback 　 Digital voice recorder 目　錄第 1 章　緒　 論 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????1　 課題研究的目的和意義 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????1　 國內外研究現(xiàn)狀 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????1　 論文研究內容 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????2第 2 章　 錄音筆設計方案與論證 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????3　 錄音筆設計方案的提出 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????3　 錄音筆設計方案分析論證 ????????????????????????????????????????????????????????????????????????????????????????????????????????????3　 錄音筆設計方案的確定 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????4第 3 章　 硬件設計 ?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????6　 主控制模塊 ????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????6　 STC89C52 單片機總控制電路 ??????????????????????????????????????????????????????????????????????????????????????????????6　 STC89C52 引腳 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????9　 ISP 技術（在線可編程） ????????????????????????????????????????????????????????????????????????????????????????????????????11　 語音模塊 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????12　 語音芯片 ISD4004 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????12　 語音芯片 ISD4004 引腳功能描述 ??????????????????????????????????????????????????????????????????????????????????????13　 按鍵控制電路 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????14　 顯示電路 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????15　 音頻放大電路 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????16第 4 章　 軟件設計 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????18　 軟件設計流程圖 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????18　 各個子程序的設計 ??????????????????????????????????????????????????????????????????????????????????????????????????????????????????????18　 錄音子模塊 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????18　 放音子模塊 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????19　 鍵盤掃描模塊 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????20第５章　 結論與展望 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????22參考文獻 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????23致　 謝 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????24附　 錄 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????25附錄Ａ　 外文資料原文 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????25附錄 B　 系統(tǒng)電路原理圖 ???????????????????????????????????????????????????????????????????????????????????????????????????????????????????34附錄Ｃ　 程序清單 ????????????????????????????????????????????????????????????????????????????????????????