| 摘要 |
PROBLEM TO BE SOLVED: To restrain generation of malfuction and trouble of an electronic apparatus, and improve reliability and safety, by connecting a breaking circuit with each auxiliary apparatus, detecting a supply current to each auxiliary apparatus, with each current detection circuit, and controlling each of the breaking circuits, with a controller, on the basis of the respective detected results. SOLUTION: The respective breaking circuits 15, 16 are connected with the respective current detection circuits 13, 14 and the respective output terminals of an I/O resistor 17, and connected with the respective function extension option machines 19, 20, via the respective connectors 21, 22. The respective circuit breaking circuits 15, 16 are opened and closed by a signal from the I/O resistor 17, and the power supply from a power source circuit 12 to each of the function option machines 19, 20 is interrupted or continued. By a controller 18 constituted of a CPU of a computer, the switching control of each of the breaking circuits 15, 16 is performed for each function extension option. Thereby it can be set that power is predominantly supplied to, e.g, an external storage device which is necessary for starting an electronic apparatus, even if circuit change is generated in other auxiliary apparatus. |
