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Altera_Forum
Honored Contributor
17 years agoMinimum Pulse Width (dcfifo)
Hi, I got many minimum pulse width timing violations (as the attached screenshot) related to the dcfifos in the design and don't know how to fix them. Could anyone point me to the right directi...
Altera_Forum
Honored Contributor
17 years ago --- Quote Start --- Among other things: You need to check that your clk speed is not too high for fifos, that fifo reset is synchronised to faster clk. It is all speculative. This error is very rare. You need to post as much info as possible. --- Quote End --- The wrclk is 320MHz and the rdclk is 32MHz. I am using Cyclone III. The reset is synchronized to the wrclk. Is it 320MHz too high for dcfifo in Cyclone III? How could I find out the maximum frequency dcfifo supports? Thanks, Hua