Controlling method of a memory card

A method of controlling a memory system which is connectable to a host device and an external device other than the host device, the memory system including a host interface to connect to the host device, a wireless network interface to connect to the external device, a nonvolatile memory configured to store data from the host device and the external device, and a register including a plurality of pages, a first data port, and a second data port, a specific page of the register storing information indicating a number of one or more functions, the method comprising:

• controlling the nonvolatile memory to write and read data in response to a request from the host device via the host interface;
• transmitting data stored in the nonvolatile memory to the external device or receiving data from the external device, via the wireless network interface with a wireless communication;
• and
• setting, in the register, a first address region to which a first function of the wireless communication is assigned, a second address region to which a second function of the wireless communication is assigned, and a first register associated with a wireless communication specification, the first address region and the second address region being located at different pages of the register, the first data port being associated with the first function, the second data port being associated with the second function.