Thanks.  Those are certainly solid suggestions.  I probably should have mentioned that I have already verified that all of the LAN9221 power planes are functioning (+3.3V, +1.8V, and the LAN9221-regulated 1.8V core voltage).  Still, thanks all the same!

Best Regards,

Dave Billin

Graduate Research Assistant --MS Computer Engineering
University of Idaho
Moscow, Idaho 83844


From: Nick Wernicke []
Sent: Monday, September 10, 2012 10:51 PM
To: General mailing list for gumstix users.
Subject: Re: [Gumstix-users] LAN9221 not recognized in TOBI-based design

This is probably not the problem, but is power connected to the LAN9221 correctly? The center pad of the LAN9221  should be solidly grounded, bypass caps located very near the power input pins, etc? Sometimes the weirdest problems can be power related.