微机主从通讯系统多232口连接电路设计  

The design of multi-232 ports interface applying for micro-controller's master-slave system

作　　者：官晟[1] 张杰[1] 丁永耀[1] 

机构地区：[1]山东青岛国家海洋局第一海洋研究所

出　　处：《微计算机信息》2005年第4期200-201,共2页Control & Automation

摘　　要：EIARS-232标准接口是微机及其外设最常见的串行通讯接口。由于其采用反向传送方法,当多台232接口设备共用总线时,总线将被限位在-5V～-15V,信息无法传送。利用232接口芯片设计了一种适用于微机主从通讯系统的多232口连接电路,解决了232接口共用总线问题。EIA RS-232 is the most common standard of serial communication. When the instruments with RS-232 serial ports are used in a single bus master-slave system,the bus will be set because the signal is transmitted contrarily by 232 port. A multi-232 ports interface used in master-slave system is designed. The interface is helpful to get over the difficulty.

关 键 词：主从系统 232口 MAX232 

分 类 号：TN702[电子电信—电路与系统]