Abstract: A method of manufacturing a system LSI is disclosed, in which the running cost such the power consumption is not increased even in the case where the hardware, and software are reused for reducing the manufacturing cost. The method for manufacturing a system LSI, having at least a processor and a memory in a single chip, comprises the steps of preparing a system LSI in the stage where a preset common process has been complete, determining the working area for activating an application program mounted on the system LSI based on the datapath width of the processor and the word length and the number of words of the memory used for activating the application program, and completing the manufacture of the system LSI in such a manner that no power is supplied to the area other than the working area. In this way, the hardware and software are reused without increasing the power consumption or other running costs.

Abstract: The present invention has as an object thereof to provide a logical operational circuit which is capable of realizing, with present semiconductor manufacturing technology, logical functions, the realization of which has been extremely difficult heretofore as a result of constraints in the voltage levels which are to be discriminated on the floating gate of the neuMOS.