| 摘要 |
<p>There is provided a command input type IC card including a plurality of memory semiconductor elements capable of electrically writing and batch-erasing, and an address decoder for decoding a card enable signal on the basis of an address signal so as to selectively output a chip enable signal to one of the memory semiconductor elements. The operating modes of each element are determined on the basis of a command input from the outside. The IC card also includes a command detector and a latch circuit, both of which inhibit the address decoder from a decoding operation when the command input from the outside is a predetermined command. The card enable signal is thereby supplied as the chip enable signal to all the memory semiconductor elements. <IMAGE></p> |
