A host controller interface is a register-level interface that enables a host controller for USB or IEEE 1394 hardware to communicate with a host controller driver in software. Open Host Controller Interface (OHCI) is an open standard. Computer dictionary definition for what OHCI (Open Host Controller Interface) means including related links, information, and terms. The EHCI, OHCI, and UHCI Drivers. The Open Host Controller Interface (OHCI) is an open standard that defines the interfaces between certain USB and Firewire drivers, hardware. It supports the “Open Host Controller Interface” (OHCI), which standardizes hardware register protocols used to talk to USB 1.
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