摘要
介绍了以二片89C2051单片机为核心构成半双工RS-485通讯中继器的原理和方法,并给出具体电路。该中继器具有软硬件设计简单、可靠性高和成本低廉的特点。
In the essay, the design of RS-485 repeater in Half-Duplex communication is introduced. It is composed of two micro-controllers 89C2051 mainly and has the characters of high reliability and simplici ty. Its schematic drawing is given.
出处
《微计算机信息》
1999年第4期28-28,30,共2页
Control & Automation