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本文介绍一种用于AppleⅡ微机的A/D转换接口电路及其在数据采集中的应用,并介绍用机器语言程序实现快速高分辨率绘图的方法.A/D转换接口电路,如图1所示.A/D转换器采用ADC0808,它有八个模拟输入通道IN0～IN7,由地址线A、B、C译码确定选中某一个通道.ALE为地址锁存控制端,START为起动信号,输出端有三态缓冲器,由输出允许端OE控制,因此,它与微机的接口很简单.除了ADC0808以外,
This article introduces a kind of A / D conversion interface circuit used in Apple Ⅱ computer and its application in data acquisition, and introduces the method of fast high-resolution drawing with machine language program.A / D conversion interface circuit, A / D converter using ADC0808, which has eight analog input channels IN0 ~ IN7, determined by the address lines A, B, C decode select a channel .ALE is the address latch control side, START is the start signal, The output has a tristate buffer that is controlled by the OE of the output enable, so the interface to the microcomputer is simple. Except for the ADC0808,