diff options
| author | Martin Pieuchot <mpi@cvs.openbsd.org> | 2014-03-10 12:19:38 +0000 |
|---|---|---|
| committer | Martin Pieuchot <mpi@cvs.openbsd.org> | 2014-03-10 12:19:38 +0000 |
| commit | 60dbcdeefe563b8ecef3452556ae0e52b8ef0fc0 (patch) | |
| tree | 42f3ef081250e2bccd2480b00c86448c90a84125 /share | |
| parent | 2172c3273d6b8bbbf65b13e381a1877ec76279bb (diff) | |
Mention rate-matching hub since newer EHCI controllers come without
companion controller.
Diffstat (limited to 'share')
| -rw-r--r-- | share/man/man4/ehci.4 | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/share/man/man4/ehci.4 b/share/man/man4/ehci.4 index 735823a71d1..6be8b21f0c8 100644 --- a/share/man/man4/ehci.4 +++ b/share/man/man4/ehci.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: ehci.4,v 1.11 2008/06/26 05:42:06 ray Exp $ +.\" $OpenBSD: ehci.4,v 1.12 2014/03/10 12:19:37 mpi Exp $ .\" .\" Copyright (c) 2001 The NetBSD Foundation, Inc. .\" All rights reserved. @@ -27,7 +27,7 @@ .\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE .\" POSSIBILITY OF SUCH DAMAGE. .\" -.Dd $Mdocdate: June 26 2008 $ +.Dd $Mdocdate: March 10 2014 $ .Dt EHCI 4 .Os .Sh NAME @@ -52,9 +52,10 @@ This means that they normally have one or more companion controllers .Xr ohci 4 or .Xr uhci 4 ) -handling USB 1.x devices. -Consequently each USB connector is electrically -connected to two USB controllers. +or an internal rate-matching hub to handle USB 1.x devices. +.Pp +If at least one companion controller is present, 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 buses. |