EHCI compliance testing program Adopters can demonstrate compliance of their product s with the specification through the EHCI compliance testing program provided by Intel. This specification is intended for hardware component designers, system builders, and device driver software developers. By using this site, you agree to the Terms of Use and Privacy Policy. All current development should be targeting this revision of the specification. The Wikibook Serial Programming: Research Intel Labs focuses on research and technologies that enrich our lives.

Uploader: Kagacage
Date Added: 16 April 2018
File Size: 39.28 Mb
Operating Systems: Windows NT/2000/XP/2003/2003/7/8/10 MacOS 10/X
Downloads: 28284
Price: Free* [*Free Regsitration Required]

Device Sleep Tech Proposal, Rev.

Typically only a small number of USB devices are attached to a system at one time, and on the average a USB device supports endpoints, of which only a subset of the endpoints are active at the same time.

This article includes a list of referencesbut its sources remain unclear because it has insufficient inline citations. Research Intel Labs focuses on research and technologies that enrich our lives.

Host controller interface (USB, Firewire) – Wikipedia

That is, at any point in time a large number of endpoints may be ready to move data, however only a subset are actively moving data. Enhanced Comlliant Controller Interface Spec.

USB Technical Manual has a page on the topic of: April Learn how and when ehcu remove this template message. In other projects Wikimedia Commons.


Legacy USB host-controller interfaces define a relatively simple hardware data-pump; where critical state related to overall bus-management bandwidth allocation, address assignment, etc. Allows host enci hardware to safely prefetch information from the asynchronous and periodic schedules beyond what was defined in previous EHCI implementations to improve system memory access behavior Enhanced Host Controller Interface specification for Universal Serial Bus addendum, version 1.

Describes the internal cable interface for USB 3. Since then, mobile platforms have become the platform ehvi choice, and their batteries have made power consumption a key consideration.

Enhanced Host Controller Interface Specification

Originally a PC providing high-speed ports had two controllers, one handling low- and full-speed devices and the second handling high-speed devices. The ckmpliant revision of the specification is Revision 1. Retrieved from ” https: By using this site, you agree to the Terms of Use and Privacy Policy.

Contact us Refer any questions about the specification or licensing program to EHCI Support by clicking on compliznt of the following links: Safari Chrome IE Firefox.

Extensible Host Controller Interface

Since each USB device is allowed to define up to 31 endpoints, an xHCI that supported devices would have to support 7, separate total endpoints. The reader is expected to be familiar with the current USB specification revisions.

There are many ways to define queue state, however if one were to assume 32 bytes of register space for each queue, then almost a KB of register space would be required to support 7, queues. Enhanced Host Controller Interface for If a computer provides non-x86 USB 1. Peripheral and IP vendors will be able to develop their designs, insulated from the high-speed and analog circuitry issues associated with the USB 2. This page was last edited on 17 Januaryat Please help improve it or discuss these issues on the talk page.


The specification includes a description of the hardware and software interface between system software and the host controller hardware.

USB EHCI Compliance Test Program

From Wikipedia, the free encyclopedia. Describes the implications and discusses specific solutions for OS Also USB endpoint activity tends to be bursty. The driver software is typically provided with an operating system of coompliant personal computerbut may also be implemented by application-specific devices such as a microcontroller.

On-the-go supplement to the USB 2. Standards Intel standards and global initiatives enable technological innovations to The specification is intended for hardware ehc designers, system builders, and device driver software developers.