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RE: ETRAX 100LX MCM 4+16
there are no known issues with the transceiver on the 2+8.
I talk about the 4+16 only.
Ethernet problems we have investigated here have been caused
by sub-optimal routing on the PCB and not by the component
> -----Original Message-----
> From: email@example.com
> [mailto:firstname.lastname@example.org] On Behalf Of Nagy Zsolt
> Sent: den 16 juni 2004 09:37
> To: dev-etrax
> Subject: Re: ETRAX 100LX MCM 4+16
> You write that "the current revision has a minior issue with the
> What do you mean by current revision? The latest MCM 2+8 or
> the new MCM
> Why do you change the transceiver in 4+16? Are there any known issues
> for the transciever in 2+8?
> The errata for MCM 2+8 tells nothing about the transceiver.
> I reported an Ethernet problem on this list in msg04426.html.
> Can it be
> the same issue?
> Is it true, that the problem can vanish on 10 Mbit?
> Fredrik Norrman wrote:
> >Hello all,
> >the new MCM with more flash and RAM has been released.
> >A few of the changes:
> >o 4MB Flash
> >o 16MB SDRAM
> >o A new transceiver
> >o The reset bug (see the errata) has been fixed
> >* It should be noted that the current revision has a minor issue
> >with the transceiver that causes it to drop packets when used
> >with very long cables. It is only measureable over a few million
> >packets with cables above ~80m in length though.
> >We are working with the supplier to fix this in new revisions.
> >The 4+16 MCM is orderable in volume today.
> >Technical design datasheet will be published in a few days. It should
> >be noted to those who have preliminary versions of the datasheet that
> >the next publish will include info to make it possible to work with
> >a future revision 2 of the chip. More details will come.
> >Furthermore, about pricing:
> >The 4+16 will cost the same as the current 2+8 with the same price
> >Best regards
> >Fredrik Norrman