USB Device

Universal Serial Bus (USB) devices are peripherals attached to a USB Host. Using the USB protocol, devices provide the functionality to the end-user. Typical devices include products such as keyboards, mice, medical devices, and thumb drives.

Devices are implemented by adding both software and hardware to a peripheral's design.

Device Hardware

  • Contains the circuitry to serialize and deserialize all communications with the host.
  • Notifies the host of its presence and speed requirements.
  • Generates Cyclic Redundancy Check (CRC) when needed.
  • Supplies the memory (or registers) for the endpoints.

Device Software

  • Responds to all host communication requests.
  • During enumeration, informs the host regarding communication requirements of the device.
  • Provides communication Application Programming Interfaces (APIs) for the device's application programmers.

 Learn More

  Return to Top

© 2024 Microchip Technology, Inc.
Notice: ARM and Cortex are the registered trademarks of ARM Limited in the EU and other countries.
Information contained on this site regarding device applications and the like is provided only for your convenience and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE. Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.