文件名称:ADC
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采用Intel8255端口数据线与上图除IN0~IN7之外的引线连接。
程序步骤：
(1)根据模拟信号输入连线方式(跳线JP10与电位器１相连，若JP10上跳线摘掉，可将电位器２作模拟信号输入)，选择模拟通路，即选定addC,addB,accA组成三位二进制数据；
(2)同时使START和ALE有效，使ADC0809选择相应模拟信号并转换；
(3)等待EOC出现高电平；
(4)使OE为高电平，即允许从ADC0809读出数据
-Intel8255 port using data cable with the exception of the map outside the IN0 ~ IN7 pin connection. Procedural steps: (1) According to the analog signal input connection means (JP10 jumper connected with the potentiometer 1, if the jumper JP10 removed can be Potentiometers for analog signal input 2), select the analog channel, namely, the election set addC, addB, accA composed of three binary data (2) At the same time so that START and ALE effective, so select the appropriate ADC0809 analog signal and conversion (3) wait for EOC appears high (4) to enable the OE for the high electrical ping, which allows读出数据from ADC0809
程序步骤：
(1)根据模拟信号输入连线方式(跳线JP10与电位器１相连，若JP10上跳线摘掉，可将电位器２作模拟信号输入)，选择模拟通路，即选定addC,addB,accA组成三位二进制数据；
(2)同时使START和ALE有效，使ADC0809选择相应模拟信号并转换；
(3)等待EOC出现高电平；
(4)使OE为高电平，即允许从ADC0809读出数据
-Intel8255 port using data cable with the exception of the map outside the IN0 ~ IN7 pin connection. Procedural steps: (1) According to the analog signal input connection means (JP10 jumper connected with the potentiometer 1, if the jumper JP10 removed can be Potentiometers for analog signal input 2), select the analog channel, namely, the election set addC, addB, accA composed of three binary data (2) At the same time so that START and ALE effective, so select the appropriate ADC0809 analog signal and conversion (3) wait for EOC appears high (4) to enable the OE for the high electrical ping, which allows读出数据from ADC0809
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ADC.txt