Difference between UC3A series 32bit chips and SAM4 micros

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Ermm... I just read the SAM4 series ARM micros on the atmel site...looks like good stuff coming up! running at 120MHZ and lot more powerful features!

My question is how is ARM different to UC3A chips? Should I start studying the SAM4 for the future projects instead of UC3A sereis chips? I have been writing codes so far on UC3A chips. But I am tempted by the frequency of operations and the extra RAM! :D

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The compute-power/clock for M3 is better than UC3.
The compute-power/watt for UC3L is better than most M3.
Not many M3 to compete against UC3C for 5 volt I/O.
The newer UC3C, UC3D, and UC3L models may indicate Atmel's goals in the competition with ARM Cortex.
The new UC3 audio-specific versions (UC3A3 AU model being one; more in UC3A, UC3B, UC3C) may show that Atmel wants to concentrate on an integrated audio capability for those UC3.
ARM Cortex-M is already in the GCC FSF trunk whereas the UC3 is not there (yet?).
Whether to switch would depend on the device's environment; if some industrial or low power then UC3 else likely Cortex-M.
For audio devices, may want to compare Atmel's UC3 AU-specific codecs versus same codec function on a Cortex-M.

"Dare to be naïve." - Buckminster Fuller

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I appreciated your summary, but I'm confused about this:

gchapman wrote:
...if some industrial...then UC3 else likely Cortex-M..

What makes UC3 more "industrial-friendly" than CM3/4?

BTW, isn't SAM4 Cortex M4?

Last Edited: Thu. Dec 22, 2011 - 11:10 PM
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The larger the power or I/O voltage is the greater the noise tolerance;
UC3C, and a few Cortex-M3, have a 5 volt I/O capability.
Though these still have a 1.8 volt core IIRC.
SAM4 is a Cortex-M4.
UC3 will hopefully survive on some margin given the giant that Cortex-M is and the expected growth in the embedded market.
It may be a recommendation that getting UC3 into the GCC trunk may aid its survival.

"Dare to be naïve." - Buckminster Fuller

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Specific SAM are replacing the functionality in some UC3; competitors' arm appear to cover the remainder of UC3.

https://www.avrfreaks.net/forum/uc3-legacy#comment-2640691

 

The most recent UC3 EOL event was March'17.

https://www.microchip.com/mymicrochip/Reports.aspx?type=cpn&filter=UC3

 

"Dare to be naïve." - Buckminster Fuller