| 摘要 |
PURPOSE:To measure the data holding current of any card by connecting a switch to be turned on at the time of disconnecting a battery holder between an electrode part connected to the anode of a battery and an unused connector terminal. CONSTITUTION:The mechanical switch 8 to be opened/closed in accordance with the existence of the battery or the battery holder is connected between the anode electrode of the battery 3 and the unused connector terminal. Namely the connector terminal 7 is an unused terminal whose use is inhibited, a power supply control circuit 2 switches a system power supply or the battery and the switch 8 is connected between the anode electrode of the battery 3 and the unused connector terminal 7 whose use inhibited and opens/closes its electric contact in accordance with the existence of the battery 4 or the battery holder. Thereby a terminal to be regarded as an unconnected and unused terminal when a user uses a card can be used as one of test terminals at the time of shipping the card. |
