| abstract |
The present invention prevents a power supply from sneaking around between semiconductor circuits at the time of turning on and off the power supply to the entire system and at the time of transition between energy saving states, thereby preventing shortening of the life of the semiconductor constituting the circuit. . A switch for turning on / off a power supply of a CPU and a memory for mechanical control including fixing of an engine, and a switch for turning on / off a power supply of an ASIC for transferring an image of the engine. 9007), a switch 3 (9007) for turning on / off the power of a pull-up resistor of the PCI-BUS 6017 for connecting the ASIC 3 (9002) and the ASIC 1 (9015) of the controller, and the controller ASIC 1 (9015) are omitted in the figure. However, the switch 1 (9016) for turning on / off the power of the CPU and the memory management ASIC is controlled in a predetermined order when the power is turned on and off, and when the energy saving state transitions. [Selection diagram] FIG. |