无ROM单片四位机-COP402

• 作 者: 毕玉国
• 出 处: 集成电路应用
• 发表日期: 1986年01期
• 关键词: 指令代码 指令功能 EPROM COP402 二进制码 修改功能 寻址 应机 有效位 系列产品

一、概述目前市场上已有COP 402单片四位机出售,国内少数工厂也正在组织生产。COP 402单片四位机是美国国家半导体公司生产的COP四位机的系列产品。一般的单片四位机常集成ROM、RAM于单片之内,无ROM单片四位机则不含ROM、ROM由用户自己选择,一般使用EPROM,COP402即属于这一类型。单片四位机中的ROM主要存放工作程序,因此又常称之谓程序存贮器。ROM、RAM合于单片之内的四应机,其工

I. Overview The current market has been COP 402 monolithic four-bit machine for sale, a small number of domestic factories are also organizing the production. The COP 402 monolithic four-bit microcomputer is a family of COP four-digit machines manufactured by National Semiconductor. Usually single-chip four-bit machine often integrated ROM, RAM in a single chip, ROM-free single-chip four-bit ROM is not ROM, ROM by the user’s own choice, the general use of EPROM, COP402 that belongs to this type. Single-chip four-bit machine in the main store ROM working procedures, it is also often referred to as program memory. ROM, RAM together within the single-chip four machines, their work