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Message
From: Ravi Kumar <ravikumar_vlsi@y...>
Date: Thu, 6 Mar 2003 08:36:03 +0000 (GMT)
Subject: RE: [usb] Clarification on USB
Thanks marc for ur reply
--- Marc Reinig <mreinig@p...> wrote: > The
contention is avoided by only have devices that
> work plugged in to the
> USB. Certainly a device that does not adhere to the
> turn around time spec
> is not a working device.
>
> The contention is controlled by the host shutting
> off the port that the
> device is connected to and not talking to the device
> any more, if this
> occurs more than a few times.
>
> Marc Reinig
> System Solutions
>
>
> > -----Original Message-----
> > From: owner-usb@o...
> [mailto:owner-usb@o...]On Behalf
> > Of Ravi Kumar
> > Sent: Tuesday, March 04, 2003 10:41 PM
> > To: usb@o...
> > Subject: [usb] Clarification on USB
> >
> >
> > Hi Folks
> >
> > I have a Query on Usb.
> > suppose host puts IN token and send it to device
> .
> > 2.Device takes more than the Bus turn around Time
> ( or
> > more than the bit times required to respond )
> > 3.Host wil assume itz the Bus time out and
> intimate to
> > software.
> > 4.Assuming this the host wil retry to the same
> Device
> > .
> > 5.By that time whn Device responds for the
> previous IN
> > token it wil lead to Contention
> >
> >
> >
> > How the above said Contention is avoided or
> > controlled.
>
>
>
>
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