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Altera_Forum
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14 years ago

Which one is the right design??(very simple design)

please i need yours help. in the following design the result was calculated by the signal (x) and connected to the output port (output), i got the following result: lut =17 worst-case tsu ...
Altera_Forum's avatar
Altera_Forum
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14 years ago

In the first one you are using intermediate signal x then registering the output from x.

In the second one you register output directly thus eliminating 8 registers between x and output.

Both are correct functionally but I don't quite get your timing report. The second one should be enough unless - in a large project you get timing violations and may opt for extra registers.