| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device that properly controls the timing of switch-on in a configuration in which a plurality of power supply switches provided with respect to one circuit block are sequentially turned on. SOLUTION: The semiconductor device includes an internal circuit, a plurality of power supply switches respectively provided in a plurality of parallel paths for supplying a current to the internal circuit and controlled into a conductive state or a non-conductive state, a command part for giving an instruction for cutting off power supply to the internal circuit or an instruction for supplying power supply to the internal circuit, a variation detection part for detecting whether or not a current supplied to the internal circuit via the power supply switches is in a steady state so as to output the detection result, and a logic circuit for controlling the timing to make the plurality of power switches conductive according to the detection result when a current supply amount to the internal circuit is increased by sequentially making the plurality of power supply switches conductive in response to the power supply instruction of the command part. COPYRIGHT: (C)2011,JPO&INPIT |
