To restrain a data volume from increasing, and to easily verify a crosstalk.
This system is provided with a specification valve setting means for setting an amplitude and a period as specification values for selecting a critical network of a functional block circuit, a circuit simulation means for executing circuit simulation for the functional block circuit, a simulated result storage means for holding a simulated result, a critical network selecting means for finding the amplitude and the period based on a change of a potential of each node in the simulated result to be compared with the set specification value, and for selecting the critical network from a node of the functional block circuit, a wiring capacity calculating means for selecting wiring of the critical network from the wiring on a mask pattern, referring to a cross-reference of the mask pattern and a circuit data, to calculate wiring capacities of the wiring of the critical network and other wiring, and a wiring capacity attaching means for attaching the wiring capacity to the functional block circuit.
Tomoyasu Sakaguchi
Hiroki Naito