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Altera_Forum's avatar
Altera_Forum
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21 years ago

Running SDRAM at double speed

I currently have a NIOS1 design (but I think this will apply to NIOS2 as well) running at 60MHz, with 16 MB SDRAM. The internal SOPC clock is PLL-ed to 60MHz and the E0 output (also 60 MHZ) is ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

Even in the case of a max speed of 100MHz I will still gain performance (50Mhz x2). My gut-feel tells me that the Avalon bus will only wait until a transaction is completed. If the SDRAM controller finishes quicker then the Nios CPU and other master will run faster too.

The 2nd master can be another Nios, fully transparent VGA running off main memory or any master that regularly requires memory at close to full speed.

Victor