Thanks, I was talking to the Atmel Tech On Tour folks today and the part I&#x27;m really interested in of late is the R21 which has both radio parts and the M0+ in a tiny package.<p>It has up to 32K of RAM and 256K of flash [2], the larger Cortex chips have the big RAM numbers as you note.<p>[1] <a href="http:&#x2F;&#x2F;design.avnet.com&#x2F;axiom&#x2F;atmel-sam-r21-atmel-cortex-m0-embedded-flash-mcus&#x2F;" rel="nofollow">http:&#x2F;&#x2F;design.avnet.com&#x2F;axiom&#x2F;atmel-sam-r21-atmel-cortex-m0-...</a><p>[2] <a href="http:&#x2F;&#x2F;www.atmel.com&#x2F;Images&#x2F;Atmel-42223-SAM-R21_Datasheet.pdf" rel="nofollow">http:&#x2F;&#x2F;www.atmel.com&#x2F;Images&#x2F;Atmel-42223-SAM-R21_Datasheet.pd...</a>