| 摘要 |
PURPOSE:To provide the inexpensive information card used again while rejecting illegal use. CONSTITUTION:A flush memory 100 stores call units or the like in a prepaid card (information card) to rewrite the data. The rewrite of data is limited in one direction from '1' to '0' by a delete control logic 210 and rewrite is initialized from '0' to '1' for a predetermined number of times. The initializing available number of times is stored in a fuse memory 200 or the like. Data in the memory 200 are updated in the case of initializing to limit the initializing for the predetermined number of times or over. |
