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Altera_Forum
Honored Contributor
17 years agoDDR2 SDRAM: local_init_done not going high
I have built a DDR2 SDRAM v7.2 controlller, v7.2, using the Megawizard and a native interface. I have reviewed my schematic and pinout and it looks to be correct. The local_init_done is not going h...
Altera_Forum
Honored Contributor
17 years agoFor an SODIMM with 64 bits, ie. non-ecc, use x8/x9. If you right click on the picture of your part in pin planner, it will show a context menu. Click 'show DQ/DQS pins -> x8/x9'. The banks will appear to be color coded.
Each bank will have 8 DQ pins, 1 DM pin, and 1 DQS pin. If you are using differential DQS, then the bank will also have a DQS# pin. The DQS must go on the S pin and the DM and DQs all go on Q pins. For more info, look at Altera AN 408.