A Transfer Descriptor (TD) is a system memory data structure that is used by the Host Controller to define a buffer of data that will be moved to or from an endpoint. TDs come in ...
笔记 An item is piece of information about the device. All items have a one-byte prefix that contains the item tag , item type , and item size . 一个“项”是描述设备的一段信息。所有项都有一个字节的前缀,其中包...
描述 格式 注释 描述 A Collection item identifies a relationship between two or more data (Input, Output, or Feature.) For example, a mouse could be described as a collection of two t...