| 摘要 |
<p>PURPOSE:To change a backup battery in a state that an external power source unit is connected to a power source terminal by connecting a prescribed external power source unit so as to be attachable and detachable, and providing the power source terminal for receiving electric power which is supplied. CONSTITUTION:This side from a dotted line l is a part invaginated to an elec tronic apparatus, and a connector 1a (first connecting means) to be connected to the electronic apparatus body is provided. This connector 1a is, for instance, a pin connection shape, and provided with a power source pin VCCP for receiv ing a power source supply from the electronic apparatus body, an external power source pin EXVP for supplying external electric power supplied from a power source terminal 3 (second connecting means) to the electronic appatatus body, and pins for an address signal, a data signal and a control signal for executing read and write to a RAM being a holding means contained in an IC card 1, etc. In such a way, a change of a backup battery can be executed in a state that the external power source unit is connected to the power source terminal 3.</p> |
