MULTIPLE POWER SOURCE SEMICONDUCTOR INTEGRATED CIRCUIT

摘要

The suppression of wasteful power consumption by stopping a power supply to an unused functional block in a multiple power source semiconductor integrated circuit manufactured by using a process of high leakage current. A multiple power source semiconductor integrated circuit (1) is provided with first to fourth functional blocks (11 to 14) for receiving a power supply from first to fourth power supply circuits (3 to 6), respectively, and a power source control circuit (40) for controlling a power supply by the first to fourth power supply circuits (3 to 6) on the basis of control by a microcomputer that is the first functional block (11). The power source control circuit (40) stops the power supplies of the first to fourth functional blocks (11 to 14) when receiving predetermined data from the functional block (11) and restarts a power supply when receiving first and second interrupt signals (55 and 56) from outside.