The Enhanced Host Controller Interface (EHCI) specification describes the register-level interface for a Host Controller for the Universal Serial Bus (USB) Revision 2.0. The specification includes a descr iption of the hardware/software interface be
The Open Host Controller Interface (OpenHCI) Specification for the Universal Serial Bus is a register-level descr iption of a Host Controller for the Universal Serial Bus (USB) which in turn is described by the Universal Serial Bus Specification, so