| 摘要 |
PURPOSE:To reduce the designing manhours of wirings by using a means which selects an unconnected connection terminal of a package substrate out of those connection terminals of said package substrate based on the value closest to a coordinate value in the array direction of the connection terminals of the package substrate for the connection terminal of a circuit part. CONSTITUTION:A parts pin b5 having the maximum Y axis coordinate value is first extracted and a package substrate terminal a8 having the same Y axis coordinate value as the pin b5 is selected. If the terminal having the same coordinate value of the pin b5 is not detected, a package substrate terminal having the coordinate value closest to the Y axis coordinate value of the extracted pin b5 is selected. Then a package substrate terminal having the minimum Manhattan distance from the pin b5 is allocated to the relevant parts pin within a range including upper and lower (p) pieces of terminals centering on the selected package substrate terminal (p equal to 1 in this example). The wiring between those allocated package substrate terminal and parts pin is set so that it does not cross another completed wiring.
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