Computer hardware standards USB. Because the card has a standard OHCI interface, the OS does not need to know in advance exactly who makes the card or how it works; it can safely assume that the card understands the set of well-defined commands that are defined in the standard protocol. It has many fewer intellectual property restrictions than UHCI. EHCI was designed [ by whom? 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. Intel hosted EHCI conformance-testing and this helped to prevent the incursion of proprietary features.

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This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations. Learn how and when to remove these template messages. On the expansion card or motherboard controller, this involves much custom logic, with digital logic engines in the motherboard’s controller chip, plus analog s3c410 managing the high-speed differential signals.

If a computer provides non-x86 USB 1. By using this site, you agree to the Terms of Use and Privacy Policy. Please update this article to reflect recent events or newly available information.

Extensible Host Controller Interface. It requires a license from Intel. It has many fewer intellectual property restrictions than UHCI. Retrieved April 13, The driver software is typically provided with an operating system of a personal computerbut may also be implemented by application-specific devices such as a microcontroller. Intel hosted EHCI conformance-testing and this helped to prevent the incursion of proprietary features.

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Extensible Host Controller Interface xHCI is the newest host controller standard that improves speed, power efficiency and virtualization over its predecessors.

CONFIG_USB_XHCI_HCD: xHCI HCD (USB 3.0) support

The OHCI driver provided low- and full-speed functions for USB ports of a PCI expansion card with any other chipset vendor’s integrated USB host controllers or discrete controller chipsets attached to the computer’s expansion bus, if present.

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Compared with UHCI, it moves more intelligence into the controller, and thus is accordingly much more efficient; this was part of the motivation for defining it.

This page was last edited on 17 Januaryat Because the card has a standard OHCI interface, the OS does not need to know in advance exactly who makes the card or how it works; it can safely assume that the card understands the set of well-defined commands that are defined in the standard protocol.

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This article’s factual accuracy may be compromised due to out-of-date information. Please help improve it or discuss these issues on the talk page.

Computer hardware standards USB. April Learn how and when to remove this template message.

linux/linux/drivers/usb/host/ Source Tree – Woboq Code Browser

EHCI was designed [ by whom? This article has multiple issues.

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Originally a PC providing high-speed ports had two controllers, one handling low- and full-speed devices and the second handling high-speed devices.