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Altera_Forum
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16 years ago

Max Speed for altshift_taps in a M9k

I'm trying to run an altshift_taps module at 400 MHz, but Quartus is telling me that it is restricted to 375MHz. My setup for the altshift_taps module is : M9K, 3 taps, tap distance 4, width 12 and ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

looks like there are a couple of modes where even the SIII -2 M9K runs at 375MHz if the read-during-write option is set to "Old Data". i'm not sure that altshift_taps should be using that mode, or how to tell that is it from a mapper or fitter report.