Memory card authentication system, capacity switching-type memory card host device, capacity switching-type memory card, storage capacity setting method, and storage capacity setting program

A method for setting a storage capacity in a host device exchanging information with a memory card, the method, comprising:

• initializing the memory card;
• obtaining information on an internal register of the memory card;
• judging whether the memory card can use a plurality of capacity expressions while switching between the capacity expressions;
• authenticating a capacity expression of the internal register of the memory card when the memory card is incapable of using the plurality of capacity expressions by switching between the capacity expressions;
• and
• using a capacity expressed by the internal register.

A method for setting a storage capacity in a host device exchanging information with a memory card, the method, comprising:

• initializing the memory card;
• obtaining information on an internal register of the memory card;
• judging whether the memory card can use a plurality of capacity expressions while switching between the capacity expressions;
• authenticating a capacity expression of a large-capacity expression register of the memory card when the memory card can use the plurality of capacity expressions by switching between the capacity expressions;
• and
• using a capacity expressed by the large-capacity expression register.

A storage capacity setting computer program product to be executed by a host device, the host device exchanging information with a memory card in a memory card authentication system, the computer program product, comprising:

• instructions for the host device to initialize the memory card;
• instructions for the host device to obtain information on an internal register of the memory card;
• instructions for the host device to judge whether the memory card can use a plurality of capacity expressions while switching between the capacity expressions;
• instructions for the host device to authenticate a capacity expression of the internal register of the memory card when the memory card is incapable of using the plurality of capacity expressions by switching between the capacity expressions;
• and
• instructions for the host device to use a capacity expressed by the internal register.

A storage capacity setting computer program product to be executed by a host device, the host device exchanging information with a memory card in a memory card authentication system, the computer program product, comprising procedures for:

• instructions for the host device to initialize the memory card;
• instructions for the host device to obtain information on an internal register of the memory card;
• instructions for the host device to judge whether the memory card can use a plurality of capacity expressions while switching between the capacity expressions;
• instructions for the host device to authenticate a capacity expression of a large-capacity expression register of the memory card when the memory card can use the plurality of capacity expressions by switching between the capacity expressions;
• and
• instructions for the host device to use a capacity expressed by the large-capacity expression register.