External Ram Interfacing

[sherif123]

I need to interface the FPGA(Spartan 3e) with an external RAM because the internal block ram is small. I found some on CYPRESS but they are about 4M X 32b.
I need to have for ex 64Mbyte memory and to interface with Spartan 3e. I don't care a lot about the speed of the clock. The system will not run on a clock more than 100 MHz. I also need the data bus of this external memory to be 32 bits.
What type of memories I should look at?
What companies do sell these memories?
How much does this technique cost?
Thanks

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I also need to ask about how easy it is to write a memory controller for this external memory or does it come with its memory controller??

 

[TrickyDicky]

SD ram would probably be easiest. They also have memory controllers made by many people. Xilinx probably provides a memory controller core with a full subscription licence.