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Altera_Forum
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13 years ago

General questions about memories, configuration and FPGA systems.

Hi, I have done some research on the forum about the topic, but i have still some questions and want to verify and sum up everything. In my questions about system configuration i will refer to ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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Thanks Socrates,

Is there anything that i must watch for when choosing DRAMs?

For example i have seen that DDR Controllers have a specific memory parts to choose - i was trying to find one on Digikey - even if they are on the list, the stack is 0.

Can i buy any memory, and then in DDR Controller choose one memory and adjust timings for the one that i bought?

best,

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Depends on FPGA. SDRAM is the easiest: You can route it to any pins You want, the controller core is really small. DDR and DDR2 is harder, because there are only dedicated pins for DQ/DQS pins and controller cores are damn huge. DDR3 is not supported by Cyclone III.