| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To increase a return speed in a low power consumption mode in which prior information is retained upon power shutdown, and to achieve it by reducing overhead on a circuit area therefor. <P>SOLUTION: A power line for data retention upon power shutdown is formed with wiring finer than a usual main power line. Preferably, power lines for a data retention circuit are considered as signal lines and wired in automatic placing and mounting. For this purpose, terminals for the power line for the data retention circuit are previously designed by providing the terminals therefor for the cell in the same manner as in normal signal lines, thereby: eliminating an additional layout for power lines; achieving decrease in the area; and allowing the designing by an existing arranging and wiring tool. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
