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ehci (4)
  • >> ehci (4) ( FreeBSD man: Специальные файлы /dev/* )
  • ehci (7) ( Solaris man: Макропакеты и соглашения )

    • BSD mandoc
     

    NAME

    

ehci

 - USB Enhanced Host Controller driver

 

    SYNOPSIS

    device ehci  

    DESCRIPTION

    The driver provides support for the USB Enhanced Host Controller Interface, which is used by USB 2.0 controllers.

    EHCI controllers are peculiar in that they can only handle the USB 2.0 protocol. This means that they normally have one or more companion controllers (i.e., ohci(4) or uhci(4)) handling USB 1.x devices. Consequently each USB connector is electrically connected to two USB controllers. The handling of this is totally automatic, but can be noticed since USB 1.x and USB 2.0 devices plugged in to the same connector appear to connect to different USB busses.  

    SEE ALSO

    ohci(4), uhci(4), usb(4)  

    HISTORY

    The device driver first appeared in Fx 5.1 .  

    BUGS

    The driver is not finished and is quite buggy.

    There is currently no support for isochronous transfers.

     

    Index

    NAME
    SYNOPSIS
    DESCRIPTION
    SEE ALSO
    HISTORY
    BUGS

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