More powerful microcontroller

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i looking powerful microcontroller has plenty of flash , ram data processing, yet compact in size (size of tqfp-32/48) , compatible arduino firmware.

i have came across atsamd21g18, don't think powerful enough.

are there microcontrollers more powerful , compatible arduino firmware?

thanks lot!  :)

the arduino 0 uses micro if i'm not mistaken. can find schematic on product page.


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