Interfacing SDRAM with the EP2C35

Karthik,

I think you only need the reserved DQ lines for your RAM interface if you are using DDR or faster RAM, not a single data rate SDRAM. I'm using a single 16M x 16 Micron SDRAM (133MHz) wih an EP3C25 and wired up the signals to simply board layout, rather than stick with the reserved DQ pins on the device.

I'm running the SDRAM controller included with the NIOS II in SOPC builder, and it works fine.

I do think if you are using DDR, DDR2 or faster memory you will need to pay special attention to the layout, pin assignments, and so on.

Hope that helps.

Jim

<div class='quotetop'>QUOTE (karthiknsanji @ Apr 6 2007, 01:10 AM) <{post_snapback}> (index.php?act=findpost&pid=22863)</div>

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Hello Everyone.

I found out that its possible to interface an SDRAM with the EP2C35 from the cyclone II handbook. Can anyone tell me how exactly i could do it? My design needs an SDRAM with a 32 bit data bus. I found only 16 dq lines in the cyclone II reference manual.

So will it be worthwhile trying to go for an SDRAM or would i be better off trying to make use of a 16 bit ddr ram to achieve the same?????

Thanks a lot

Karthik[/b]

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