| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an IC card in which a responding state can be displayed outside in a data communication to be operated in response to data received from the outside. SOLUTION: A data protecting memory 3 is provided for a data holding memory 2. An abnormality judging circuit 1 judges the processing state of the data of the data holing memory 1. When the abnormality judging circuit 1 judges that data received from the outside are normally written in the data holding memory 2, a responding state display 7 receives the instruction of a main control circuit 11, and operates normal communication end display. On the other hand, when it is judged that the writing state of the data is abnormal, and the data of the data holding memory 2 can be restored by the data of the data protecting memory 3, the responding state display 7 operates data restoration display. When the data restoration can not be operated, the responding state display 7 operates communication abnormality display.</p> |
