USB Internals

A Description of the Universal Serial Bus System Architecture

Universal Serial Bus (USB) technology is now very widely used as the most popular connectivity interface standard, due to both its flexibility and simplicity for the end user. Connecting USB peripherals to a computer has become significantly easier since USB was introduced. We no longer need to know what type of cable or port a particular device requires. At the other hand, however, the development of USB devices and software is difficult due to USB protocol complexity. The intent of this article series called "USB Internals" is to provide enough of the basics to get you started and help you become more familiar with USB internal structure, USB hardware and software.

• Brief USB Overview and History

• USB System Architecture Components

- HID Class support added.
- Syncing Capture List with Device Tree.
[...]

- Hub Class support added.
- New Data Analysis Panel added.
- New Request Details column added.
[...]

The USB Properties panel has been completely re-designed and now the USB device descriptors are presented in much greater details. [...]