| 摘要 |
An IC card which can normally perform the next data communication processing if there is an abnormality in data communication is provided. When abnormality determination circuit 1 determines that the previous data reception state is normal, before newly received data to be held DA is stored in a data holding memory 2, IC card 100 saves data in a region to write data DA into a data protection memory 3. Meanwhile if abnormality determination circuit 1 determines that the previous data reception state is abnormal, data in data holding memory 2 is recovered using data which has been saved in data protection memory 3 before accessing to data holding memory 2 is started.
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