IC CARD

摘要

An IC card with which the next data communication can be processed normally even when the current data communication is abnormal. On an IC card (100), the data in the writing area of newly received data DA to be held are saved to a memory (3) for protecting data before the data DA are stored in a memory (2) for holding data when an abnormality discriminating circuit (1) discriminates that the preceding data receiving state is normal. When the circuit (1) discriminates that the preceding data receiving state is abnormal, the data in the memory (2) are restored by using the saved data in the memory (3) before the access to the memory (2) is started.