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Altera_Forum's avatar
Altera_Forum
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21 years ago

DDR vs. SDR RAM...

Anyone know if DDR Ram will fare better with the NiosII data master than SDRAM? After Dirk figured out it takes a whopping 12 clocks @50MHz (~240ns) per SDRAM read when not using the dma, we re...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

You're never going to overcome 12 clocks with MHz. You'd need close to 500-1200 MHz to get the performance you should be getting at 100MHz. That's not going to happen.

The only thing we can do right now is use memory that has fixed timing like SRAM or onchip SRAM.

My question was whether DDR is any better/closer in this respect than SDR.

Ken