Advanced Micro Devices Inc (AMD)

[muzohub]

afaik, I don't believe that you can make on die memory controller changes with metal layer changes only.

depends on what the change is. if it involves a completely new io family (ie sstl2 to rdram) then it is not possible but if it is logic, it is most likely and even if it is similar io with say different bias voltage differences or current drive strengths, it depends on how much you've anticipated. if you have a dll with programmable tap select, programmable bias generators and lots of spares, a lot of things are possible but you have to plan ahead a little.