DDR2 Controller Config "local_size"

Hello all, thank you for responding to my post. I am using the StratixII GX and not using the SOPC builder. Yes, you are correct the board is from PLDA and I must say the code and documentation they provide is above average and I am pleased. Also, they did not provide a Reference Design with the DDR2 included and they tested the DDR2 up to 200Mhz.

I think it would be best to run using 4-lanes which gives a PCIe core clock of 125Mhz. I noticed that when I run the MegaCore Toolbench wizard for the DDR2 controller and then set the clock to 250Mhz I must then modify some parameters to meet timing constraints. But if the clock is 125Mhz then it says I meet all my timing contraints.

I've attached a schematic of the connection to the DDR2 memories. They have 2 banks, with each bank having 2-memory chips. Each bank is 32-bits. Could I use one DDR2 Controller to interface with the full 64-bits? I want to do 64-bit writes and reads. Currently I am not using the HP DDR Controller.

Thanks for taking the time to read my message,

joe