Intel Press - USB Design By Example: Additional Chapter 3 Information

Getting to Know You: Enumeration

USB Specification

Enumeration examples

I captured the enumeration of several devices using a CATC* Chief*

First download the free CATC trace viewer

Then download five example CATC traces


	HID (I used a mouse)

	HID, but looking at the upstream hub connection

	Hub, so that you can see that it enumerates just like any other device

	Audio device (I used Yamaha* speakers, these also have a HID interface)

	Mass Storage device (I used a ZIP* drive)