just to clarify, you need more than 2MB of RAM? If so, I'm afraid I don't know of any MCU with that much memory.
You might have to look at some microprocessors that expose the address and data bus to allow scalability with external memory. Possibly something from our Sitara line. http://www.ti.com/processors/sitara-arm/overview.html
I'll move this thread over there.
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In reply to JD Crutchfield:
From the processor catalog I can recommend the Sitara AM335x device: www.ti.com/.../overview.html
In reply to Biser Gatchev-XID:
thankyou sir for the suggestion. I have already taken AM3352 series with operating frequency from 300 to 1Ghz.But the problem I am facing now is that the power consumption is too high.
I may have to drop this option only because of this reason.
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