| 摘要 |
PROBLEM TO BE SOLVED: To load a plurality of option devices on a portable terminal. SOLUTION: The option device loading/unloading device 10 has a general slot 12 for loading a general option device. The device 10 further has a special terminal group 20 provided separately from a general terminal group 14 of the general slot 12, a detector circuit S2 which detects a special option device using the special terminal group 20 being loaded in such a case, and a switch circuit 30 which selects a signal group to be supplied to the device loaded in the general slot 12 out of a plurality of signal groups. Here, the specifications of the general slot 12 are disclosed and the specifications of the special terminal group 20 is not disclosed. When the detector circuit S2 detects the special option device being loaded, the switch circuit 30 selects the signal group for the special option device. |
