USB 设备类型 device class 代码完整版

USB Class Codes

December 7, 2011

USB defines class code information that is used to identify a device’s

functionality and to nominally load a device driver based on that

functionality.The information is contained in three bytes with the names Base

Class,SubClass, and Protocol.(Note that ‘Base Class’ is used in this

description to identify the first byte of the Class Code triple.That terminology

is not used in the USB Specification).There are two places on a device where

(either Device or Interface Descriptors or both).



Base

Class

Descriptor

Usage

Description

00h Device Use class information in the Interface Descriptors

01h Interface Audio  

02h Both Communications and CDC Control

03h Interface HID (Human Interface Device)

05h Interface Physical

06h Interface Image

0Eh Interface Video

0Fh Interface Personal Healthcare

10h Interface Audio/Video Devices