What are multi-cycle paths, Computer Engineering

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What are multi-cycle paths?

Multi-cycle paths are paths among registers which take more than one clock cycle to turn out to be stable.

618_Multi-cycle paths.png

For illustration analyzing the design demonstration in figure below demonstrates that the output SIN/COS needs 4 clock-cycles after the input ANGLE is latched into. This implies that the combinatorial block (the Unrolled Cordic) can start to 4 clock periods (25MHz) to propagate its consequence Place and Route tools are able of fixing multi-cycle paths problem.


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