Re: gEDA-user: FT232R

[Mike Hansen <mehansen10@xxxxxxxxxxx>]

   Both 245 232 seem to have the problem:

   [1]http://www.motherboardpoint.com/ft245bm-problem-missing-corrupt-dat
   a-t94973.html

   Unfortunately we did experience this problem on all of our boards.  As
   I understand it from the post even their eval boards displayed this
   problem.   And even though that post is old I can tell you that chips
   we've used in the last year had that problem.  All you need is a motor
   to turn on in the vicinity of the device and you are locked up.  We
   implemented the capacitor solution in the link above and this did
   mitigate the problem but it didn't go away entirely.   We're stuck
   redesigning the board with another mftr's chip.  We can't have it go
   for say an hour or a day and then just lock up.  And there's no way
   through software to reset the device. You have to manually remove the
   USB cable.

   FWIW.

   > Date: Wed, 8 Apr 2009 17:57:02 -0400
   > From: dj@xxxxxxxxxxx
   > To: geda-user@xxxxxxxxxxxxxx
   > Subject: Re: gEDA-user: FT232R
   >
   >
   > > The FTDI USB UARTs have noise immunity issues. They tend to lock
   up
   > > after running for an hour or so. And worst of all they only reset
   > > themselves when the USB cable has been physically removed. It's a
   > > well known problem. I would avoid this chip for new designs.
   >
   > Is this an urban legend, or do we have proof? I've never had any
   > problems with the FTDI parts, and I've run them for days on end.
   >
   > > Suggest looking at something from SiLabs.
   >
   > FTDI has better Linux support.
   >
   >
   > _______________________________________________
   > geda-user mailing list
   > geda-user@xxxxxxxxxxxxxx
   > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
     _________________________________________________________________

   Windows Live: Keep your life in sync. [2]Check it out.

References

   1. http://www.motherboardpoint.com/ft245bm-problem-missing-corrupt-data-t94973.html
   2. http://windowslive.com/explore?ocid=TXT_TAGLM_WL_allup_1a_explore_042009


_______________________________________________
geda-user mailing list
geda-user@xxxxxxxxxxxxxx
http://www.seul.org/cgi-bin/mailman/listinfo/geda-user