摘要
由于被广泛接受,事实上USB已成为外设与PC机及膝上型电脑连接的公认标准。随着便携式设备的日益普及,他们在没有PC机时,彼此之间也能直接通信的需求就随之产生了。OTG解决了这个问题。USB OTG是USB2 .0规范的补充协议,USB OTG的核心特征是一个USB设备在和其他USB设备连接时既可作为主机,也可作为外设。他使USB设备可以在没有PC机的参与下实现彼此间的数据传输。他的提出解决了USB设备之间点到点的通信。本文讨论OTG的主要特性,包括连接器、电缆、双角色设备、主机协商协议HNP、事务请求协议SRP等。
Due to its widespread acceptance, USB has become the facto industry standard for connecting peripherals to PC′s and laptops. As the portable devices increase in popularity, there is a growing need for them to communicate directly with each other when a PC is not available. The OnThe Go Supplement meets this need. USB OnTheGo (OTG)is a supplement to the USB 2.0 specification. The USB OTG core features a USB device that can serve as either a master or a slave when connected to another USB device. The standard supports peripheraltoperipheral connectivity without the need for a host PC. It allows USB device to have peer topeer capability. The article discusses significant features of OTG supplement,including connectors,cable,dualrole device,HNP,SRP,and so on.
出处
《现代电子技术》
2005年第10期29-31,共3页
Modern Electronics Technique
