RE: [usb] Clarification on USB

[Ravi Kumar <ravikumar_vlsi@yahoo.co.in>]

Thanks marc for ur reply



 --- Marc Reinig <mreinig@pacbell.net> 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@opencores.org
> [mailto:owner-usb@opencores.org]On Behalf
> > Of Ravi Kumar
> > Sent: Tuesday, March 04, 2003 10:41 PM
> > To: usb@opencores.org
> > 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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