Forum Discussion

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

Need some help to use altdq and altdqs megafunction.

Hi, I am working on memory controller. In that data received from memory is edge aligned with clock. I want to give phase shift of incoming clock to 90 degree so that I can receive data cent...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Thanks for replying in such short time.

I forgot to tell you that I am designing nand flash controller and not DDR controller. I instantiated altdq and altdqs megafunction in my design. I did not get any phase shift in my incoming clock. I think altdqs megafunction is little bit confusing. In that one NOTE is there USE INPUT DELAY FROM DUAL Purpose Clock Pin assignment in the Assignment Editor to set DQS clock delay.

I assigned different value for dqs pin but I did not get any phase shift.

So please help me if you have any idea regarding this issue.

Regards,

Krupesh