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ULPI

ULPI allows chip and system designers to connect a Hi-Speed USB transceiver to USB core logic embedded in application-specific integrated circuits (ASICs) and systems-on-chip (SoCs). The ULPI specification covers USB host, device, and On-The-Go implementations.

OHCI, UHCI and EHCI

OHCI, UHCI and EHCI are USB Spec compatible and provide an interface to different hardware host controller implementations. Multiple implementations of hardware host controllers allow for evolution and creativity within the USB Spec. Details of these specs are available through these links. (Links will open up a new window).