Re: RF/LF
Boaz,
The reason is EMI control.
Best Regards,
Rich
--
Boaz Shahar wrote:
>
> Pat,
> If the PHY-XGXS discovers LF fault on the Tx XAUI path and generate
> continuous POS, why cant the PCS just transfer it as is? In the worst case,
> the other side XAUI will transmit continuous POS (P+/P-) and even if
> SYNC/DESKEW is lost in the other side, its still interpreted as LF there.
> Boaz
> > -----Original Message-----
> > From: THALER,PAT (A-Roseville,ex1) [mailto:pat_thaler@agilent.com]
> > Sent: Monday, January 29, 2001 9:04 PM
> > To: Boaz Shahar; THALER,PAT (A-Roseville,ex1); Tim Warland; 802.3ae
> > Subject: RE: RF/LF
> >
> >
> > Boaz,
> >
> > That applies when there is no XAUI and it also applies when
> > the Phy XGXS
> > attached to the PCS is generating LF. The XGXS/10GBASE-X
> > receiver now sends
> > continuous LF to the XGMII interface when it detects a loss
> > of alignment.
> >
> > Pat
> >
> >
> > > -----Original Message-----
> > > From: THALER,PAT (A-Roseville,ex1) [mailto:pat_thaler@agilent.com]
> > > Sent: Wednesday, January 24, 2001 11:19 PM
> > > To: Tim Warland; 802.3ae
> > > Subject: RE: RF/LF
> > >
> > >
> > >
> > > For the change to the receive state machine, see comment 1159
> > > which removes
> > > the detection of |P| (which in d2.1 will be |Q|) which is the
> > > behavior Boaz
> > > mentions. The decision to send constant ordered sets on the
> > XGMII when
> > > detecting a local fault was made. Comment 267 was part of
> > > that, but the full
> > > resolution isn't in that comment's response. Also see comment
> > > 592 and 588.
> > > These resolutions also impact clause 49 because it will now
> > > need to be able
> > > to drop pulse ordered sets,
> >
> > You probably mean when there is no XAUI, right?
> >
> > Boaz
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