USB Function IP Core

The Universal Serial Bus (USB) has evolved to the standard interconnect
between computers and peripherals. Everything from a mouse to a camera can be
connected via USB. With the new USB 2.0 specification, data rates of over 480
Mb/s are possible.
The Universal Serial Bus is a point to point interface. Multiple peripherals are
attached through a HUB to the host.
This core provides a function (peripheral device) interface. It can be used to
interface almost any peripheral to a computer via USB. This core fully complies to
the USB 2.0 specification and can operate at USB Full and High Speed rates (12
and 480 Mb/s).
Note:
This specification assumes that the core will most likely be used in a high
speed environment and includes references to special high speed extensions.
However, when operation in full speed mode only, some of those
high speed extensions will not be used and the core will properly behave as
a full speed function only.