Forum Discussion

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

DDR/DDR2 HP compiler - multiple devices

Hi, I am trying to drive two DDR devices from one instance. I have made the settings in the wizard, so I am getting two clock pairs, 2 cke's and so on. But the ras/cas/adress signals needs to ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi,

well the HP compiler core will NOT let you split the command signals while the legacy compiler will.

You will get the WYSIWYG error. I have to figure out a way to generate an array[2] of command signals and then map them to the ALT_DDIO primitive. Or something like that.

For now it looks like i'm going with the "old way".

"That's of course supported by the controller, cause it's the same as using the chips within a module"

It is not. A module has only one set of command signals.

Regards

Geir