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Altera_Forum
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11 years ago

cyclone ii and ddr sdram interfacing

hi, i am using cyclone ii ep2c50 484 pin package, i am interfacing ddr sdram to fpga. here for data fpga has dedicated pins but for address and controls it doesn't have any dedicated pins. can...
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Altera_Forum
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11 years ago

I strongly recommend you look through the following document: external memory interface handbook volume 5 - section i. altmemphy design tutorials (http://www.altera.co.uk/literature/hb/external-memory/emi_tut_ddr.pdf).

This discusses in great depth connecting DDR memory to FPGAs.

Yes, there are dedicated pins for the data. Pin selection for the control bus (address, cs, wr etc.) is a little more flexible.

I recommend you put a design together and let the tools give you a pinout. You can either use this as is or make changes, each time confirming, with Quartus, that the pin changes you're making can be supported.

Regards,

Alex