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something goes wrong when using the full data width for the DDR2
mhd.mayya@gmail.com --- Quote End ---
Do you raise your ddr2 sdram's memory by change "memory data bus width" or change the "chip select"?
I found that when I set "memory data bus width" to 32,and let "chip select" to be 1, I can use 128M of the ddr2 sdram.But when I set "chip select" to be 2 or change "memory data bus width" to 64,they both don't work well.
I found another phenomenon, quartus9 will assign "dq,dqs,dm" automatically,and you must use these automatically assigned pins,otherwise you will get a "DDIO" error when compile these project.
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