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今天有愈来愈多的便携式消费性电子产品采用USB接口与主控端PC交换数据。若这些产品能直接相互通讯,就能增进使用者在操作上的便利性并扩增产品的功能,但USB2.0规格本身的某些限制,导致这个目标难以实现。高普及率的USB标准最近扩增“On-The-Go”(OTG)功能,让移动产品能直接进行点对点模式的数据交流。符合OTG规格的新产品能同时支持传统的主控端(PC)与装置对装置的联机模式。此外,USBOTG规范新的接线、连接头、以及连接座的规格,因此能简化实体连结并提升移动装置的功能。本文介绍USB OTG为使用者提供各项利益,也将摘述OTG Rev1.0版USB2.0追加规格的各项功能特色。
Today, more and more portable consumer electronic products use the USB interface to exchange data with the host PC. If these products can communicate directly with each other, user-friendliness and product functionality can be enhanced, but some of the limitations of the USB 2.0 specification itself make this goal difficult to achieve. The USB standard for high penetration recently expanded its “On-The-Go” (OTG) capabilities to allow mobile products to directly communicate data in peer-to-peer mode. OTG-compliant new products can support both traditional PC-to-device on-line modes. In addition, USBOTG regulates new wiring, connectors, and connector specifications, thereby simplifying physical connectivity and enhancing the capabilities of mobile devices. This article describes the USB OTG to provide users with the benefits, will also be summarized OTG Rev1.0 USB2.0 additional specifications of the various features.