| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a highly convenient IC card capable of acquiring an accurate electric power source residual amount of an internal electric power source, and capable of preventing trouble from being generated; and a program for the IC card. <P>SOLUTION: This IC card 10 is provided with a battery 33 and a switch circuit 34, and operated by electric power supplied from the battery 33 when the switch circuit 34 is switched to be turned on. The IC card 10 is characterize by further being provided with a microcomputer 40 for display for detecting a voltage level of the battery 33, when the switch circuit 34 is switched to be turned on, and a nonvolatile memory 50 for storing the detected voltage level, when the detected voltage level is lower than a voltage level detected. <P>COPYRIGHT: (C)2007,JPO&INPIT |
