| 摘要 |
PURPOSE:To reduce the battery consumption in a non-use state and a non- normal state by holding an electronic circuit in a low current consumption state until an information communication is started after the title accessory apparatus has been installed in an apparatus body. CONSTITUTION:Even if an accessory apparatus is installed in an apparatus body and detected 6, and also, a power source 3 is turned on, unless information communications DCLK, DOL, DLC are started normally to the apparatus body, an electronic circuit 11 in the accessory apparatus is held in a low current consumption state by a low current consumption state holding means 10. In such a way, in case an installation state of the accessory apparatus and the apparatus body is not normal, or a fault, a crosstalk state or a contact failure is generated in an information communication system of the accessory apparatus and the apparatus body, only a low current being below an operation level flows to the electronic circuit 11 and a useless battery consumption can be prevented. |
