MEMORY SYSTEM

PROBLEM TO BE SOLVED: To provide a memory system capable of controlling various radio communication function.SOLUTION: A control unit 13 controls a nonvolatile semiconductor memory device 18. A memory 15 is a working area connected to the control unit. A radio communication function unit 19a has a radio communication function. An extension register 31 is provided in the memory 15. The control unit processes a first command to read the extension register and a second command to write the extension register. The extension register records information specifying the type of the radio communication function on a specific page and address information indicating a region on the extension register to which the radio communication function is assigned. The extension register to which the radio communication function is assigned records information on the radio communication function.