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Altera_Forum's avatar
Altera_Forum
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16 years ago

Custom component writing to SD-RAM

Hi fellows, i have created a system in which nios II processor is running at 100 MHZ and ddr sdram is running at 150 mhz so , i also added a clock crossing bridge, after this i created a ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

Perhaps one of the master examples on the altera website (http://www.altera.com/support/examples/nios2/exm-avalon-mm.html) would be useful?

One thing to keep in mind is that you really shouldn't be too worried specifically about how to write to SDRAM but instead how to write to an Avalon slave. Writing to any slave, including SDRAM, is the same.

Another thing to watch out for is that SDRAM is an example of a high latency slave, particularly for reads. Because of this, if you need to achieve high bandwidth/efficiency to the slave, you will need to use pipelining or burst transfers.