Forum Discussion

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

DDR2 DQSn Pin Question

Hi, All I am using Cyclone III and DDR2 as memory, I found there is no DQSn Pin in CycloneIII device. So how to connect DQSn pin in DDR2 memory device. Connect to Vtt=0.9V or GND, or somewhere...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Unless you make a psudo-diff pin set by taknig the signal and it's inversion - placing them next to each other and adding proper termination on the board. THen it will be a mtter of the speed you are looking to obtain - best to do some PCB simulation with something like HyperLinx to make sure it all works.

Regards,

Avatar