| 摘要 |
<p>A method and system capable of gaining access (data transfer) to portable type media whose number is larger than the number of ports on a processing unit side. Thus, in this invention, by using a demultiplexer (340), to one or more portable type medium ports (310A, 310B) provided in a processing unit (300) there are connected a plurality of portable type media (330) whose number is larger than the number of the ports. The demultiplexer (340) selectively switches the ports (310A, 310B) and, of the plurality of portable type media (330), the media to be accessed by the processing unit (300) for establishing the connections therebetween. This invention is applicable to data transfer between a plurality of portable type media such as IC cards capable of storing digital money and a processing unit having an ability to gain access to these portable type media. <IMAGE></p> |
