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Altera_Forum
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14 years ago

DCFIFO megafunction simulation problem

Hi, I'm attempting to use a DCFIFO megafuction in my design, but, at least during functional simulation (ModelSim-Altera), the last word in the FIFO isn't being read. The rdempty signal asserts...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

first of all, why are your clocks not clocks (50-50 mark space ratio?)

secondly - why is the data changing at a much faster rate than the write clock?

thirdly - in the first picture I cannot see any of the input data.

in the second I cannot see any of the rd data in the write data stream.

So I dont think you're using the DCFIFO correctly.