| 摘要 |
<p>PURPOSE:To provide a transmission control system in which the switching of a protocol can be attained regardless of the difference of a transmitting condition used for each protocol when the plural protocols are supported by an IC card. CONSTITUTION:A card reader/writer is connected through a transmission line to the IC card, the IC card is activated according to a signal from the card reader/writer, and the transfer of data is mutually operated. The IC card is equipped with a means which outputs prescribed initial response data after activation, means which controls at least two protocols, means which stores protocol decision information for deciding which protocol is used, means which operates when the IC card is activated, and updates the protocol deciding information at the time of outputting the initial response data, and means which restores the protocol decision information in response to the transfer of the data.</p> |
