摘要
单片机接口技术发展的一个趋势是:由并行外围总线接口向串行外围总线接口转变。USART全称是通用同步异步收发器,它是一种单片机外设模块,该资源常用于CPU与较远距离的设备进行通讯。USART接口可以用作同步传送或异步传送,是工业通信中的一种标准接口,而且USART串行接口外围扩展技术具有方便灵活、电路系统简单、占用I/O口资源少等特点。文章所实现的USART多处理机通信,通过地址和数据两种命令格式进行交互,此通信系统可以用作设备控制总线,方便灵活地控制外围设备。
The SCM interface technology development is a trend： the parallel external bus interface to change serial peripheral interface bus.The full name is universal synchronous USART asynchronous receiver/transmitter,it is a single-chip peripheral module that is commonly used in the CPU and longer distances to communicate with the device.USART interface can be used as a synchronized transmission or asynchronous transfer is industrial communication standard interface,and USART serial interface perimeter extended technology with convenient,flexible,circuit system is simple,takes up less i/o resources.This article is the implemented USART multiprocessor communication,by address and data two command format to interact,this communication system can be used as a device control bus,facilitate flexible control of peripheral devices.
出处
《电脑与信息技术》
2010年第6期49-51,共3页
Computer and Information Technology
