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Altera_Forum
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17 years ago

DDR2 Controller

I am trying use the DDR2 ALTMEMPHY with about 20 DDR2 chips. The local FAE says that it is only possible to use 8 chips as that is all the GUI will allow you to select. Is there a way to use a larger...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

For the Micron memory I am using it is 125Mhz. Note it will work slower but the DLL does not lock.

Be forewarned though, I have been fighting to get the memory working for 4 weeks now. If you can not design the board to use Altera's DDR2 controller then you might as well give up. At 125Mhz it is almost impossible to meet timing on 8 grade speed part.

Of course I am biased and I doubt I will ever use a Altera part again. The Altera local FAE will not return my phone calls or emails for help. Thus the support from Altera has been really poor.

Trampas