摘要
本文详尽地介绍了在PIC单片机上外接一片内置电平转换器的全功能异步串行收发芯片MAX3 110 ,直接扩展出一个标准RS2 3 2串行通信接口的具体方法。该方法以较简单的硬件连接实现异步数据传输、电平转换 ,其软件编程只需考虑PIC与MAX3 110之间的同步数据通信。扩展的RS2 3 2串口 ,提升了系统的应用性能。另外 。
In many application systems, two and even more RS232 users are needed to communicate with different instruments, so other serial ports must be expanded on the base of PIC MCU, which already has one. This article presents a new and practical solution of expanding a serial port for PIC MCU by connecting an UART with ±15kV ESD-protected RS-232 transceivers-MAX3110, which can highly enhance the communication performance and system applicability. Principles, technical details and the specific procedures of PIC interruption protect are also discussed in this paper.
出处
《自动化技术与应用》
2004年第11期55-58,共4页
Techniques of Automation and Applications
