Freescale Semiconductor TWR-MCF52259-Ethenet - Manual (Page 106)

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The General USB Process
Host
What device class are you?
Do you supply the power or do I?
How many and of what type of
endpoints do you need?
Here is your unique address.
What transfer mode do you want?
//------------------------------------------------------------
// Sample Standard Device Descriptor Type
// Definition Fields
//------------------------------------------------------------
Length (18)
Descriptor Type (DEVICE, CONFIGURATION,
INTERFACE, ENDPOINT, HID)
USB Spec Release Number (0200h)
Device class (hub type…Human Interface defined in
other descriptor, CDC described here)
Device Sub-class (00h)
Device protocol (00h)
Maximum Packet size (64 bytes – max for the
endpoint)
Vendor ID (ID assigned by USB IF)
Product ID (ID assigned by product manufacturer)
Device release number (revision code of device)
Manufacturer (ABC Corp)
Product (string identifier)
Serial Number (1234)
Number of configurations (1 or more configurations
can follow)
The Enumeration Process:
What happens when a device is connected?