Patent ID: 7159075
Filing Date: 2007-01-02
Classification: G06F

Abstract:
1. A system for authenticating a memory card, the system, comprising: a capacity switching-type memory card host device including a capacity switch notification module which notifies a memory card targeted for exchanging information that the capacity switching-type memory card host device handles a capacity switching-type memory card, and a capacity switch authentication module which refers to a state of a large-capacity expression register use flag of the targeted memory card and authenticates whether the targeted memory card is the capacity switching-type memory card; a capacity switching-type memory card including a capacity switching-type controller which flags the large-capacity expression register use flag on receipt of notification of being the capacity switching-type memory card host device, the large-capacity expression register use flag indicating use of a large-capacity expression register which retains information with a capacity exceeding a capacity which can be expressed by an internal register; and a bus which transmits and receives data between the capacity switching-type memory card host device and the capacity switching-type memory card.