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Hi,
Two controllers on the same side is real easy in Altera devices so long as either:
a) They are both operating at the same frequency, so can share the single DLL.
b) One of them is operating in PLL capture mode, so doesn't need the DLL.
Altera actually have an application note on this, its not bad, please see:
http://www.altera.com/literature/an/an392.pdf Chris
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If each bus width is larger than 64, then the 2 controllers on the same side is not much easy. Pin assignment to meet the requirement is the first one to deal with. The IP is not flexbile with 2 ddr controller. You may need to manually add the constraints in the Quartus.
And It looks like the device cannot support 2 controllers use dedicated DQS circuit. So the frequency of ddr2 core cannot higher than 166 M(or 200M?)
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