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USB Device

Last modified by Microchip on 2023/11/10 11:19

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, and
Supplies the memory (or registers) for the endpoints.

Device Software

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

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