| 摘要 |
<p>PURPOSE:To exactly perform a processing without generating a crosstalk of data by constituting the above system sot that only a portable storage medium conforming to a main device executes the processing, based on quality deciding data transmitted from the main device. CONSTITUTION:To a portable storage medium 2 positioned within a communication range of a main device 1, quality deciding data is transmitted from the main device 1, and the portable storage medium 2 decides its own quality, based on the quality deciding data transmitted from the main device 1, and when the result of decision is normal, the processing related to processing data transmitted from the main device 1 is executed. In such a way, when plural portable storage mediums 2 exist simultaneously within a communication range of the main device 1, the processing operation is executed only to a correct portable storage medium 2 with respect to its main device, and it does not occur that a crosstalk is generated in the main device 1.</p> |
