Memory card for data transfer system, data storage device, system host, and memory card identification method

A data storage device that is connected to a system host by a cable that communicates a first data signal for high-speed data communication and a second data signal for standard data communication with a lower communication speed than a communication speed of the high-speed data communication, the data storage device comprising:

• an adapter that includes an interface converter having a first adapter interface unit that communicates the first data signal of the system host to a memory card and a second adapter interface unit that communicates the second data signal of the system host to the memory card;
• and
• the memory card that communicates the first data signal and the second data signal of the adapter and includes a memory unit and an additional information registration unit,
• wherein the first adapter interface unit supports a plurality of types of communication protocols and performs communication using one communication protocol selected from the plurality of types of communication protocols,
• the one communication protocol controls an external device using an interface of a physical signal common to a local bus of the system host,
• the second adapter interface unit specifies a type of the one communication protocol in the first adapter interface unit immediately after connection to make the first adapter interface unit communicable with the one communication protocol, and
• after making the first adapter interface unit communicable, performs communication using a communication protocol different from the one communication protocol in the first adapter interface unit,
• the memory unit includes
• a first identifier storage unit that stores an identifier of the memory unit,
• a flash memory that stores user data, and
• a memory controller that controls the first identifier storage unit and the flash memory via a first memory interface unit,
• the additional information registration unit includes
• a second identifier storage unit that stores an identifier same as the identifier of the memory unit, and
• an additional information notification unit that stores additional information and notifies the system host of the identifier in the second identifier storage unit and the additional information via a second memory interface unit, and
• when the memory card is connected to the system host, in the system host, the memory unit and the additional information registration unit are associated with each other by the identifier stored in the first identifier storage unit and the identifier stored in the second identifier storage unit.

A system host comprising:

• a first interface that is connected to a first interface unit of a memory card;
• a second interface that is connected to a second interface unit of the memory card;
• and
• an identifier association unit,
• wherein the first interface is an interface for a physical signal common to a local bus, and acquires an identifier and reads and writes user data via the first interface unit of the memory card,
• the second interface controls the memory card using an interface that is different from the interface for a physical signal common to the local bus, and acquires, via the second interface unit of the memory card, an identifier same as the identifier acquired via the first interface unit of the memory card, and
• the identifier association unit associates the first interface unit of the memory card with the second interface unit of the memory card when the memory card is connected to the system host.

A system host comprising:

• a first interface that is connected to a first interface unit of a memory card via a first interface unit of an adapter;
• a second interface that is connected to a second interface unit of the memory card via a second interface unit of the adapter;
• and
• an identifier association unit,
• wherein the first interface is an interface for a physical signal common to a local bus, and acquires an identifier and reads and writes user data via the first interface unit of the memory card,
• the second interface controls the memory card using an interface that is different from the interface for a physical signal common to the local bus, and acquires, via the second interface unit of the memory card, an identifier same as the identifier acquired via the first interface unit of the memory card, and
• the identifier association unit associates the first interface unit of the memory card with the second interface unit of the memory card when the memory card is connected to the system host.

A memory card identification method comprising:

• storing an identifier of a memory unit in the memory unit of a memory card;
• storing an identifier of an additional information registration unit in the additional information registration unit of a memory card;
• reading and acquiring the identifier of the memory unit;
• reading and acquiring the identifier of the additional information registration unit;
• and
• comparing the identifier of the memory unit acquired with the identifier of the additional information registration unit acquired, and determining whether the memory unit and the additional information registration unit are in a same memory card.