QuadRAM Shield for Arduino Mega/Mega2560
" with its 400Kbit/sec max serial transfer speed.why? If anything go with something that has SPI interface for 4 Mbit/sec serial transfer speed.
Hmm, yes, the quadram needs 5v to work, so maybe not a good option. Underpowering it won't damage anything, it just won't work.However, 3.3V versions of the chip are also availablehttp://www.mouser.com/ProductDetail/Alliance-Memory/AS7C34096A-12TIN/?qs=sGAEpiMZZMt9mBA6nIyysDfDw0vDQxSwaJg9Cfc3Tkc%3dso the Rugged Circuits folks could change the address latch to a 3.3V part and have a Due compatible board.Whether the part fits neatly into the Due address space is different matter. If the sketch is directly controlling the memory addressing as I outlined above, I don't think it matters.
but then you'll cripple performance with"I will try using a dedicated audio codec using the I2S interface." with its 400Kbit/sec max serial transfer speed.why?