【正文】 ...................................................................................1 AT89S52 的主要性能 ..........................................................................................................1 AT89S52 的功能特性描述 ..................................................................................................1 的管腳排列 ...........................................................................................................2第 2 章 GSM 模塊 ..................................................................................3 HRH GSM MODEM 介紹 .................................................................................................3 GSM Modem 的主要功能 ....................................................................................3 GSM Modem 的硬件接口 .................................................................................................3 HRH GSM Modem 的軟件協(xié)議 .......................................................................................3 設置短信中心號 ..........................................................................................................3第 3 章 鍵 盤 顯 示 .................................................................................6 HD7279 鍵盤顯示芯片 ........................................................................................................6 HD7279 的典型應用電路： ................................................................................................7第 4 章 鐵電存儲器 ...................................................................................8 鐵電存儲器的特點 ..............................................................................................................8 二線制協(xié)議 ..........................................................................................................................8第 5 章 實時時鐘 .....................................................................................10 DS12887 功能與特點介紹 .................................................................................................10 時間、日歷和定鬧單元 .....................................................................................................10大慶石油學院應用技術學院畢業(yè)論文III DS12887 引腳定義 ..........................................................................................................11第六章 后備電源 .....................................................................................12 滯回比較器： .....................................................................................................................12 滯回比較器工作原理： .....................................................................................................12第 7 章 遙 控 器 .....................................................................................14 發(fā)射、接收電路無解碼電路圖 .........................................................................................14第 8 章 傳 感 器 ..................................................................................14第八章 傳感器 ........................................................................................15 紅外傳感器 ........................................................................................................................15 煙霧傳感器 ........................................................................................................................15 氣體泄漏傳感器 .................................................................................................................15第 9 章 家庭防盜報警系統(tǒng)的軟件設計 ..................................................16 主程序流程圖 .....................................................................................................................16 外部中斷 0 中斷服務子程序流程圖 ................................................................................17第十章 程序 .........................................................................................18 .......................................................................................................................18. HD7279 鍵盤顯示子程序 ...............................................................................................21. FM24C16 讀寫子程序 ........................................