What is UHCI (Universal Host Controller Interface)?(What is, Concept and Definition)

Abbreviation for Universal Host Controller Interface , UHCI was developed by Intel.It is a USB 1.0 and 1.1 host controller consisting of two parts, HCD (Host Controller Driver) and HC (Host Controller).HCD software is responsible for scheduling USB traffic by publishing and maintaining transactions in system memory.HCD is part of the system software and is provided by the operating system provider.