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,并给出了具体电路。该中继器具有软硬件的设计简单、可靠性高和成本低廉的特点。
The design of RS-485 repeater in half-duplex communication is introduced. It consists of two 89C205ls. The schematic diagram is given. This repeater has the features of high reliability ,simple configuration and cheap cost.
出处
《电气自动化》
北大核心
1999年第6期45-46,共2页
Electrical Automation
