基于单稳态触发器的半双工通信接口设计  

Design of Half-Duplex Communication Interface Based on Mono-Stable Trigger

作　　者：王莉莉[1] 郑丰隆[1] 刘健钊[1] 孟凡猛[1] 陈鹏[1] 

机构地区：[1]山东科技大学信息与电气工程学院,山东青岛266590

出　　处：《煤矿机电》2013年第1期34-36,40,共4页Colliery Mechanical & Electrical Technology

摘　　要：RS-232/RS-485转换器依托RS-232电平与TTL电平间转换,TTL电平与RS-485电平间转换。采用单稳态触发器实现对数据收发状态以及通信时间的控制,可以支持多种传输速率下的通信。实际应用表明,该转换器电路工作稳定,传输数据可靠准确。The RS-232/RS-485 interface converter transforms between RS-232 electrical level and TFL logic level, also converts between TTFL logic level and RS-485 electrical level. The mono-stable trigger is adopted to control the time of data sending or receive and the communication time. This new design can support variety communication under multi-baud rate. The practical application indicates that this interface converter circuit operates stable, and the data transmission is accurate and reliable.

关 键 词：串行通信 RS-232总线 RS-485总线 单稳态触发器 

分 类 号：TP335[自动化与计算机技术—计算机系统结构]