| 摘要 |
<p>PURPOSE:To surely prevent data destruction, to improve the reliability of an IC memory card provided with a RAM and to reduce the cost of the IC memory card. CONSTITUTION:An EEPROM 15 is connected to a RAM 10 to constitute an IC memory card 1. When the access from a CPU 21 of a terminal machine 2 to the RAM 10 is terminated, data written in the RAM 10 is down loaded to the EEPROM 15 and is preserved at this time.</p> |
