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Altera_Forum
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12 years ago

Can Altera FPGA support DDR2 or DDR3 interchangable memory of PC?

I want my board to support DDR2 or DDR3 PC memory through standard memory slot. The FPGA should support most kinds of memory in stock. However when I tried to config DDR2 or DDR3 memory contr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

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The different speed grades have different latencies, and should generally not be mixed. Its quite possible that the timing parameters for a 667MHz RAM can be used with the faster 800MHz part, but not the other way around. Unless of course, the actual speed of the controller is slower than the rated speed of the DDR.

If the memory is the same speed grade, then the timing parameters should be vendor independent.

Cheers,

Dave

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Can I change the timing parameters for memory controller when it is running?

or could the controller get those timing parameters from memory automatically while initializing?