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随着大规模集成电路技术的发展,可以将CPU、RAM、ROM,定时器/计数器,以及输入/输出(I/O)接口电路等计算机的主要部件,集成在一块集成电路芯片上。这样所组成的芯片级的微型计算机直译为单片微型计算机(Single chipmicrocomputer)或单片微机,在我国,我们习惯称其为单片机。单片机虽然只是一个芯片,但从组成和功能上看,它已具有了微机系统的含义。由于单片机从功能和形态来说都是作为控制领域应用的要求而诞生的,并且发展到新一代80C51、M68HCO5、M68HC11系列单片机时,在其中着力扩展了各种控制功能。如模数转换(A/D)、脉宽调制(PWM)、计数器捕获/比较逻辑(PCA)、高速 I/O 口、WDT 等,已突破了微型计算机(Microcomputer)的传统内容。所
With the development of large scale integrated circuit technology, main components of a computer such as a CPU, a RAM, a ROM, a timer / counter, and an input / output interface circuit can be integrated on an integrated circuit chip. This composed of chip-level micro-computer literally translated into single-chip microcomputer (Single chipmicrocomputer) or single-chip microcomputer, in our country, we used to call it a microcontroller. Although only a single chip microcontroller, but from the composition and function point of view, it has the meaning of a microcomputer system. Because the one-chip computer is born from the function and form as the application requirement of the control field, and developed a new generation of 80C51, M68HCO5, M68HC11 series one-chip computers, among them strive to expand various control functions. Microcomputer has traversed the traditional content of A / D, PWM, Counter Capture / Compare Logic (PCA), high-speed I / O ports and WDT. The