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Altera_Forum
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10 years ago

Nios II DDR SDRAM read latency

Hi, I’m trying to optimize RAM access from Nios II. when reading 10’000 successive words from ram using iord in a for-loop, it takes 25 clock cycles per read (without loop overhead). To...
Altera_Forum's avatar
Altera_Forum
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10 years ago

Hi Simon,

I would suggest using memcpy instead of IORD. You could read data in blocks reducing considerably the latency involved. I understand that you are using single words but it would be more efficient to load a block of data from DDR, store it in an array and use each word from this block.

Best regards,

Thiago