| 摘要 |
A portable data storage card is provided for storing and carrying digital data to be accessed or modified at fixed locations. The pocket-sized card has a durable sealed case, devoid of electrical connectors. Data is stored in an internal Electrically Erasable PROM, which includes memory control circuitry. The card is inserted into a reader/programmer at a fixed location and receives power from an inductive source in the reader/programmer by means of an internal coil. Data transfer between the card and the external reader/programmer unit is effected by infrared optoelectronic devices, through the case of the card, which is transmissive to infrared light. The reader/programmer controls a user's access to the data stored on the card, requiring a user to supply a secure identification code to access the stored data. The case is opaque to visible light in order to hide the components from view.
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