近五年来,定指令式微机已相当普遍,并增加了许多新应用。用MOS技术制造的这类微机只用一单片组件就能完成所有数据处理及控制逻辑。有些产品连程序存贮器,数据有贮器和输入/输出通道都装进同一片组件,构成单片微机。由于可编程序逻辑组件价格低、体积小,它已取代组合逻辑构造定指令式微 Nearly five years, the command-command microcomputer has been quite common, and added many new applications. Such a microcomputer made with MOS technology can accomplish all data processing and control logic with a single chip component. Some products, such as program memory, data memory, and input / output channels, are loaded into the same chip assembly to form a single chip microcomputer. Due to its low cost and small size, PLD has replaced the combinational logic structure to make instructional micro