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Altera_Forum's avatar
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

sean, I don't think you will be able to get your system to meet timing with those clock rates. I think you will need to shoot for 100Mhz max on the sdram controller clocks. I tried looking at your pictures that you originally posted of your system, but they were too small to view. If you archive your project I will look at it when I have some free time. But I can tell you that unless you have a speed grade 6 chip, you aren't going to get the sdram controller to meet timing at 133Mhz. The chip is not capable of running that logic at that speed.