Hello.
I have used AM3505 with DDR2. DDR2 works fine on higher temperature but it fails at <5C. Both AM3505 and DDR2 chips are industrial grade parts (should support up to -40C). I have verified timing and layout - not found anything wrong. Does anyone have faced same issue? Please refer below schematic. I can share layout if required.
(Please visit the site to view this file)
Regards,
Bipin