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Re: A Question regarding "signal_detect" in Clause 48 (D2.0)




Boaz, James,

Signal detect in Clause 48 (PCS/PMA) is "attached" to signal detect in
Clause 54 (PMD). Since there are four receive circuits in the PMD, there
are also four signal detect signals at the PMD at some point (i.e. one
SD for each color). Clause 48 supports four signal detect inputs, one
for each lane.

When generated by a PMD, signal detect is fully specified in Clause 54. 

When generated at a XAUI receiver, signal detect is unspecified.

Happy Holidays,
Rich

--

James Colin wrote:
> 
> Hi,
> >From the text, it looks like signal detect is a signal
> from the PMD to the PCS/PMA.
> 
> This means that the XAUI has additional signals now
> (One SD for each color?)
> 
> James
> --- Boaz Shahar <boazs@xxxxxxxxxxxx> wrote:
> >
> > Rich,
> > The "signal_detect" indication (Clause 48 p. 265)
> > from the PMD is used for
> > lane signal validation. Is there a specific
> > definition describing the way
> > this signal is generated or its implementation
> > dependent? The draft requires
> > it to be a signal which is generated by the PMD, or
> > it may be generated
> > within the PMA/PCS internally?
> > Thx.,
> > Boaz
> 
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