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Altera_Forum
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21 years ago

DMA SPEED PROBLEM!

I have system with 3 SDRAM controllers 1'st is x16 SDRAM for storing code and data (MAIN_SDRAM) 2,3 is x8 for video memory (V1_SDARM,V2_SDRAM) All SDRAMs...
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Altera_Forum
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21 years ago

Hello Anidea,

Thanks for your reply.

I am using the SRAM device that is part of the Cyclone Nios dev kit. I underdstand what you are saying but the speed of the bursts is off by a factor of 10 to 20!

Actually, I talked to some Altera guys today and they made have shed a little light. It looks like for Qaurtus 4.2 and Nios 1.1 system, that the slaves have to "advertise " that they are capable of bursting. If the system does not pick this up, I am guessing from the component ptf , then I think it will go into a single cycle mode, which would explain my SDRAM numbers.

Comments anyone?

Thanks