摘要
本文介绍串口扩展器系统设计和应用,采用ATMEL89C2051单片机作MCU,选用双四通道多路转换器4052。软件设计分为:初始化、串行中断服务程序、串行口选择三个模块。串口扩展器采用侦听终端发出的信息,可连接不同的波特率设备。它小巧灵拢、结构简单、程序短、速度快,成本低,在银行中得到广泛应用。
The paper aims to introduce the design and application of serial extended unit system, its CPU made by ATMEL89C2051 SCM. Software designed divide into three model： initialize, serial interruption service programming, serial port selected .Serial extended unit detective data of terminal sent out ,connect to various devices of baud rate. Due to its small size, simple structure, compact program, fast speed and low coat, it has been widely applied in banks.
出处
《微计算机信息》
北大核心
2006年第03Z期13-15,共3页
Control & Automation
