When applied to an IEEE 1394 (also known as FireWire i.LINK or Lynx) card, OHCI means that the card supports a standard interface to the PC and can be used by the OHCI IEEE 1394 drivers that come with all modern operating systems. Open Host Controller Interface ( OHCI) is an open standard. IEEE 1394 Open Host Controller Interface On the software side, it requires a device driver (called a Host Controller Driver, or HCD). On the expansion card or motherboard controller, this involves much custom logic, with digital logic engines in the motherboard's controller chip, plus analog circuitry managing the high-speed differential signals. The driver software is typically provided with an operating system of a personal computer, but may also be implemented by application-specific devices such as a microcontroller. ( Learn how and when to remove this template message)Ī host controller interface ( HCI) 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. Please help update this article to reflect recent events or newly available information. This article's factual accuracy may be compromised due to out-of-date information.

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