Unix/Linux Go Back    


NetBSD 6.1.5 - man page for ehci (netbsd section 4)

Linux & Unix Commands - Search Man Pages
Man Page or Keyword Search:   man
Select Man Page Set:       apropos Keyword Search (sections above)


EHCI(4) 			   BSD Kernel Interfaces Manual 			  EHCI(4)

NAME
     ehci -- USB Enhanced Host Controller driver

SYNOPSIS
     ehci* at cardbus? function ?
     ehci* at pci? dev ? function ?
     usb*  at ehci?

DESCRIPTION
     The ehci 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)) han-
     dling 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
     cardbus(4), ohci(4), pci(4), uhci(4), usb(4)

HISTORY
     The ehci driver appeared in NetBSD 1.6.

BUGS
     The support for hubs that are connected with high speed upstream and low or full speed down-
     stream (i.e., for transaction translators) is limited.

BSD					   Aug 10, 2008 				      BSD
Unix & Linux Commands & Man Pages : ©2000 - 2018 Unix and Linux Forums


All times are GMT -4. The time now is 02:37 AM.