| 摘要 |
PURPOSE:To prevent the disconnection and the like of power source wirings of the titled device of master slice system due to migration by a method wherein the wiring width of the power source circuit in an LSI is enabled to vary by approximate proportion to a value of consumed power. CONSTITUTION:In the case of using the IC of master slice system at high speeds (high machine cycles), the line width of the power source wiring 4 is increased, and reversely decreased in the case of use at low speeds (low machine cycles). This manner can prevent the disconnection and the like of the power source wirings due to migration during operation at a high speed, and enlarge the wiring region of signal lines during operation at a low speed; therefore, the quantity of effective wirings increases, and the number of processes for wiring can be reduced. |
