【正文】 ........................... 5 RAM存儲(chǔ)器的選用 ........................................................................................................ 5 傳感器的選取 ...................................................................................................................... 6 ................................................................................................................ 6 ................................................................................................................ 6 A\D轉(zhuǎn)化器 .......................................................................................................................... 7 I/O擴(kuò)展芯片的選取 ............................................................................................................ 7 第三章 硬件部分 ............................................................................................................................. 8 8051單片機(jī) ......................................................................................................................... 8 單片機(jī)的發(fā)展及應(yīng)用 ............................................................................................... 8 8051芯片 .................................................................................................................. 9 中央處理器 ..............................................................................................................11 數(shù)據(jù)存儲(chǔ)器 (RAM) .....................................................................................................11 程序存儲(chǔ)器 (ROM) .................................................................................................... 12 定時(shí) /計(jì)數(shù)器 ........................................................................................................... 12 并行輸入輸出 (I/O)口 ............................................................................................. 13 全雙工串行口 ........................................................................................................ 13 中斷系統(tǒng) ............................................................................................................. 13 時(shí)鐘電路 ............................................................................................................... 14 復(fù)位電路 ............................................................................................................... 15 AT89C51單片機(jī) ................................................................................................................. 16 主要特性 ............................................................................................................... 17 管腳說明 ............................................................................................................... 17 振蕩器特性 ........................................................................................................... 18 芯片擦除 ............................................................................................................... 18 風(fēng)向傳感器 ...................................................................................................................... 19 ................................................................................................ 19 ................................................................................................... 19 ................................................................................................................. 20 AD590簡(jiǎn)介 .............................................................................................................. 20 AD590的應(yīng)用電路 ................................................................................................... 21 溫度測(cè)量電路 .......................................................................................................... 22 8155介紹 ........................................................................................................................ 23 8051 外擴(kuò) RAM ................................................................................................................... 26 8255芯片的介紹 ................................................................................................... 26 8051單片機(jī)與 8255的接口 .................................................................................... 31 模數(shù)轉(zhuǎn)換 器 AD0809 .......................................................................................................... 32 蘭州工業(yè)高等專科學(xué)校畢業(yè)論文 3 AD0809簡(jiǎn)介 ............................................................................................................ 32 ADC0809與單片機(jī)的連接 ....................................................................................... 34 HM1500濕度傳感器 ............................................................................................................ 34 HM1500濕度傳感器的工作原理 ................................................................................ 35 HM1500濕度傳感器應(yīng)用 ........................................................................................... 35 風(fēng)速傳感器 ...................................................................................................................... 36 風(fēng)速傳感器 (WAA15)的原理 ................................................................................... 36 ................................................................................................... 36 單片機(jī)的復(fù)位電路 ........................................................................................................... 37 X25165與 8051的連接 ........................................................................................... 37 X25165的工作 ....................................................................................................... 38 ........................................................................................