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Altera_Forum's avatar
Altera_Forum
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16 years ago

ddr2 sdram

Hello, I'am new to SOPC build,and sorry for my poor english. I have bought a dsp development kits from alter,and there is an ddr2 sdram on this development board. this is the development kits I...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

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these parameters refer to timing parameters for the DDR2 you actually have in your kit. so you have to read the corresponding data sheet of the DDR2 and fill in the blanks!

I recommend to take the "standard" design as a starting point.

--- Quote End ---

Thank you for your reply.

I find that the "standard" project is built in Quartus5,but I am using Quartus9.

I build a simplest project, it only contain Nios II CPU + jtag uart + ddr2 sdram, and fill the dd2 sdram's parameters as the "standard" dose.

But I get this error message when I compile my project:

Following DDIO Output nodes could not be placed by the Fitter

Now I don't know how to deal with this error

adream307@gmail.com