Patent ID: 8055844

Claim:
A memory card, comprising: a host connector; a memory controller connected to the host connector and enabled or disabled in response to a capacity expansion signal; a non-volatile memory connected to the memory controller; a memory connector configured to connect to the memory controller and the non-volatile memory; and a capacity expansion switch configured to generate the capacity expansion signal, wherein the capacity expansion switch is configured to control the capacity expansion signal to be in at least two states, the non-volatile memory includes an internal Identification (ID) register having an initial value, and the value of the ID register is changed according to the state of the capacity expansion signal, the non-volatile memory maintains the initial value of the ID register in response to one of the at least two states of the capacity expansion signal, and changes the value of the ID register in response to the other of the at least two states of the capacity expansion signal, and the host connector is configured to transfer a host interface signal, the memory connector is configured to transfer a memory interface signal, and the host and memory interface signals include ID information that is compared with the value of the ID register.