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Altera_Forum
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15 years ago

Problem SDRAM....Burst Terminate!!!

Hi all, Ok, I found out that SDRAM keeps writing forever and never stop, when I call IOWR_32DIRECT(...) in SignalTap. When I look at Dev Board Cyclone II and it does show Write and Bur...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

If your system (including the CPU) is clocked at 100MHz and your SDRAM is at 133MHz are you sure you are not hindering your performance? For a 33MHz speed increase is it worth the extra 9-12 clock cycles for the clock crossing that you have inserted? So before trying to tune this memory interface I recommend asking yourself "do I really need my RAM operating this fast???"..... just a thought. The first two chapters go into more detail: http://www.altera.com/literature/hb/nios2/edh_ed5v1_03.pdf