| 摘要 |
PURPOSE:To rapidly transfer data without degrading discharge characteristics of a bus driving circuit, by arranging a power supply wiring of exclusive use for the bus driving circuit, in a wiring region. CONSTITUTION:Data bus 16 is constituted of eight signal lines D0-D7 composed of metal, e.g. aluminum, and formed in a wiring region 30 on a chip. A power supply wiring 41 constituted of aluminum is formed in the wiring region 30, so as to be adjacent to the data bus 16, and used for a reference voltage (GND). A diffusion layer 34 is connected with one signal line constituting the data bus 16, e.g. the signal line D5, via a contact hole 38. A diffusion layer 36 is connected with the power supply wiring 41 of GND, via a contact hole 38. |
