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I think it's the way you locate the DDR2 controller on-chip and that is often used to meet some critical path requirements. Keep it as the default.
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May I have your email?
Thank you!
In my project, I set "memory data width" to 64,and let all others the same
as the "standard" project,and assign my pins following the original ddr2
core location
But I get this error information when I run "Hello world!"
Verifying 10010000 ( 0%)
Verify failed between address 0x10010000 and 0x1001001F
Leaving target processor paused
Thank you