Stop EHCI HC in OHCI handover

4.1/5 - (13 votes)
4.1/5 - (13 votes)

Stop EHCI HC in OHCI handover

Option name:

Stop EHCI HC in OHCI handover

Possible values of an option:

[Enabled], [Disabled]

The option description:

Inclusion of the given option orders to stop interface ECHI of controller USB 2.0 at connection низкоскоростной the USB-periphery using interface OHCI. It is necessary, if the operating system does not support ECHI. In modern versions Windows (Windows XP and Windows Vista) needs in application of this mechanism are not present (establish for an option value [Disabled]), and here at use Windows of 2000 and earlier versions of an operating system for maintenance of stable work the value choice [Enabled] can be demanded. In practice it, by the way, will lead to that at connection of any низкоскоростного the device supporting only specification USB 1.1, all connected USB-periphery will start to exchange the data on the speeds which are not exceeding restrictions USB 1.1 (to 12 Mbit/c). So to include this option "for the future", probably, nevertheless it is not necessary.

Interfaces OHCI (Open Host Controller Interface) and EHCI (Enhanced Host Controller Interface) describe, as a matter of fact, hardware realisation of controller USB. To the specification 1.1 USB-controllers there corresponds interface OHCI, controllers of the specification 2.0 are under construction on the basis of EHCI.

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