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Altera_Forum's avatar
Altera_Forum
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19 years ago

Access to external RAM

I have a system that appears to work at a system clock of 70 MHz but fails to work at 85 MHz. @85MHz, when we run the firmware it behaves in a very strange manner. Often it will get to a specific poi...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

tried already with inserting a waitstate?

Has the outputs to the RAM registers? Otherwise the tco will eat some of the timing budget for the RAM. (also the setup time (input registers??).

Of course this will make the interface slower.