Xilinx 8.2i manual Halting Trace, Minimum Period Statistics

Models: 8.2i

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Chapter 12: TRACE

R

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Total

5.224ns (1.835ns logic,

3.389ns route)

 

 

(35.1% logic, 64.9% route)

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Minimum Period Statistics

The Timing takes into account paths that are in a FROM:TO constraints but the minimum period value does not account for the extra time allowed by multi-cycle constraints.

An example of how the Minimum Period Statistics are calculated. This number is calculated assuming all paths are single cycle.

Example:

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Design statistics:

Minimum period: 30.008ns (Maximum frequency: 33.324MHz)

Maximum combinational path delay: 42.187ns

Maximum path delay from/to any node: 31.026ns

Minimum input arrival time before clock: 12.680ns

Maximum output required time before clock: 43.970ns

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Halting TRACE

To halt TRACE, enter Ctrl+C (on a workstation) or Ctrl-BREAK (on a PC). On a workstation, make sure that when you enter Ctrl+C, the active window is the window from which you invoked TRACE. The program prompts you to confirm the interrupt. Some files may be left when TRACE is halted (for example, a TRACE report file or a physical constraints file), but these files may be discarded because they represent an incomplete operation.

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Xilinx 8.2i manual Halting Trace, Minimum Period Statistics