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LEGAL DISCLAIMER
THESE SPECIFICATIONS ARE PROVIDED “AS IS” AND WITHOUT ANY WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED. WITHOUT LIMITATION, THERE IS NO WARRANTY OF NON-INFRINGEMENT, NO WARRANTY OF MERCHANTABILITY, AND NO WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. ALL WARRANTIES ARE EXPRESSLY DISCLAIMED. USER ASSUMES THE FULL RISK OF USING THESE SPECIFICATIONS. IN NO EVENT SHALL USB-IF OR THE USB 3.0 PROMOTERS BE LIABLE FOR ANY ACTUAL, DIRECT, INDIRECT, PUNITIVE, OR CONSEQUENTIAL DAMAGES ARISING FROM SUCH USE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
Title Category Type Technology Date
USB Audio v4.0_0.zip1.95 MBUSB Audio Devices Release 4.0 and Adopters Agreement
  • USB Device Class Definition for Audio Devices Release 4.0 and ECNs through October 31, 2025
  • USB Audio v4.0 Adopters Agreement
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Specification Device Class Specification
CDC1.2_WMC1.1_012011_0.zip3.82 MBClass definitions for Communication Devices 1.2
  • CDC Subclass for Asynchronous Transfer Mode Devices
  • CDC Subclass for Communications Devices
  • CDC Subclass for Ethernet Control Model Devices
  • CDC Subclass for ISDN Devices
  • CDC Subclass for PSTN Devices
  • CDC Subclass for Wireless Mobile Communication Devices 1.1
  • WMC110-Errata1.pdf and CDC v1.2 WMC v1.1 Errata 1
  • USB Class Definitions for Communications Devices
    Revision 1.2 with Errata and ECN through April 3, 2025
  • Adopters Agreement
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Specification Device Class Specification
Audio2_with_Errata_and_ECN_through_Apr_2_2025.pdf1.79 MBUSB Device Class Definition for Audio Devices Release 2.0 with Errata and ECN through April 2, 2025 Specification Device Class Specification
USB MIDI v2_0.pdf1.52 MBUSB Class Definition for MIDI Devices v2.0 Specification Device Class Specification
hid1_11.pdf1007.31 KBDevice Class Definition for HID 1.11 Specification Device Class Specification
pid1_01.pdf660.71 KBDevice Class Definition for PID 1.0 Device Class Specification
AV_BDP_v1.0.pdf0 bytesUSB Device Class Definition for Audio/Video Devices Basic Device Profile (BDP)
  • USB Device Class Definition for Audio/Video Devices
  • Basic Device Profile (BDP)
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Specification Device Class Specification
ContentSecurity_v2.0.pdf0 bytesDevice Class Definition for Content Security Devices 2.0
  • Device Class Definition for Content Security Devices 2.0
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Specification Device Class Specification
USB_AV_Specification_Rev_1.0.zip0 bytesAudio/Video Device Class v1.0 Spec and Adopters Agreement
  • USB Device Class Definition for Audio/Video Devices
  • AVFormat 1 - Video over Bulk
  • USB Device Class Definition for Audio/Video Devices
  • AVFormat 2 - Isochronous Audio
  • USB Device Class Definition for Audio/Video Devices
  • AVFormat 3 - Uncompressed Full Frame Isochronous Video
  • USB Device Class Definition for Audio/Video Devices
  • AV Device Class Overview & AV Function Definition
  • Video & USB Timings
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Specification Device Class Specification
usbprint11a021811.pdf0 bytesPrinter Device Class Document 1.1
  • USB Device Class Definition for Printing Devices
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Specification Device Class Specification