一、应用微处理器所面临的主要课题在出现微处理器以前,要针对某一特定应用,设计一个计算机系统,都必须从数字逻辑设计着手。可供选择的主要器件是逻辑门、译码器、计数器、移位寄存器、触发器、寄存器等中、少规模集成电路。研制一个存储器,甚至要从磁芯的测试挑选做起。但现在要设计一个微计算机系统,可供选择的器件已经不仅是一些逻编功能部件,而主要是完整的CPU(即微处理器)、存储器、外围接口等大规模集成电路的系统功能部件。于是、设计一个微处理器系统所面临的基本课题,可以归结为以下两方面:1、接口设计。这里所说的“接口”设计,主要不是指已成为微处理器系统标准组成部分的外围接 First, the main problems faced by the application of microprocessors Before the emergence of microprocessors, to design a computer system for a particular application, we must start from the digital logic design. The main devices to choose from are logic gates, decoders, counters, shift registers, flip-flops, registers, etc., and small scale integrated circuits. Develop a memory, even from the core test selection to start. But now we have to design a micro-computer system. The available devices are not only some logic functions, but mainly the system functions of a large-scale integrated circuit such as a complete CPU (ie, microprocessor), memory, and peripheral interfaces. Thus, the design of a microprocessor system faced by the basic issues can be attributed to the following two aspects: 1, interface design. The “interface” design described here does not primarily refer to the peripheral interface that has become a standard part of the microprocessor system