Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

DDR3 instantiation, NIOS, Avalon, Qsys

Goal: try to instantiate DDR3 with the DIMM in the Stratix IV E kit (DDR3 with NIOS using Avalon-MM). Goal: try to harness already existing DDR3 Stratix IV E kit work for a new project. The ki...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Thanks for your response.

Reducing column width:

Say I instantiate UniPHY DDR3 with a DIMM (like the Micron one

that comes with Stratix IV E kit).

And it's too large of a span, for reasons you mentioned.

Can I keep everything exactly the same, with one exception: simply

change the column bits from 10 to 8?

(I did this, and all the errors listed above go away. Basically, I'm trying to

reduce the usage of that DIMM by 4: only use the bottom 1/4th of the available columns).

Is this okay, or will there be yet other issues by changing the column bits

in instantiation from 10 to 8?

Thanks,

Aaron