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一、概述本刊1979年第11期中已刊载过带M6800微处理器系统的A/D转换技术,叙述了两种常用的A/D转换器的工作原理,采用微处理器控制的方案比较及A/D转换器的框图以及它们的程序流和图。本文进一步叙述采用M6800微处理器系统的这两种A/D转换器的软件编制。在编制汇编程序时除必须熟悉M6800的结构、工作机理和指令系统外,对外围接口PIA以及A/D转换器的转换原理、硬件结构都必须深入了解,才能正确地画出程序流程,灵活
I. Overview In this issue, we published the A / D conversion technology with the M6800 microprocessor system in the 11th issue of 1979 and described the working principle of two commonly used A / D converters. Compared with the microprocessor-controlled solutions and A / D converter block diagram and their program flow and map. This article further describes the software development of these two A / D converters using the M6800 microprocessor system. In the compilation of assembly procedures in addition must be familiar with the M6800’s structure, working mechanism and instruction system, the conversion of peripheral interfaces PIA and A / D converter, the hardware structure must be in-depth understanding of the program flow can be drawn correctly, flexible