Patent ID: 7114117

Claim:
A memory card having a plurality of non-volatile memories and a memory controller for controlling operation of said plurality of non-volatile memories, wherein said memory controller performs an access control of said plurality of non-volatile memories in response to an external access instruction, and an alternation control for substituting a storage area of an access error-related non-volatile memory with another storage area; each of said plurality of non-volatile memories includes a plurality of sectors, a first sector of which stores management information used for performing said alternation control thereon, said alternation control being performed individually for each of said plurality of non-volatile memories; and said memory controller causes said plurality of non-volatile memories to operate for parallel access in said access control, and issues addresses, of which a first address is for a first non-volatile memory and a second address is for a second non-volatile memory, wherein said memory controller controls issuing said addresses, such that said first address and said second address indicate same location sectors, when both of said sector of said first non-volatile memory indicated by said first address and said sector of said second non-volatile memory indicated by said second address are valid, and wherein said memory controller controls issuing said addresses, such that said first address and said second address indicate different location sectors, when said sector of said first non-volatile memory indicated by said first address is valid and a sector of said second non-volatile memory on same location of said sector of said first non-volatile memory indicated by said first address is invalid.