I tried a few times to buy Luminary Micro's ARM (28 pin dip) to play around,
but wasn't bothered enough. There were some nice designs in Circuit Cellar
constest a few years ago.

Googled and found this
http://www.luminarymicro.com/about_luminary/microchip_lawsuit_faq.html
"On April 10, 2006, Microchip (MCHP) filed a lawsuit against Luminary Micro
(6) claiming that Luminary Micro's 28-pin StellarisR series of ARMR
CortexT-M3 32-bit microcontrollers infringe three of Microchip's patents."

The lawsuit is about : 'Microcontroller having an n-bit data bus width with
less than n I/O pins' etc and therefore only against the 28pin range. 

Interesting page. Lawyers. Yuk!

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