Patent ID: 8434689

Claim:
A semiconductor memory device configured to transmit and receive of information by wireless communication, comprising: a radio antenna for performing the wireless communication; a nonvolatile semiconductor memory element that stores information to be transmitted and received via the radio antenna; a substrate on which the nonvolatile semiconductor memory element is mounted and a wiring pattern to be connected to the nonvolatile semiconductor memory element is formed; and a switching unit that switches between a state where the wireless communication is permitted and a state where the wireless communication is rejected; a change-over switch movable to a position at which writing of information to the nonvolatile semiconductor memory element is permitted and a position at which the writing is rejected, wherein the switching unit is a control unit that, when the change-over switch is at the position at which the writing of information to the nonvolatile semiconductor memory element is permitted, switches to a state where the wireless communication is rejected, and, when the change-over switch is at the position at which the writing of information to the nonvolatile semiconductor memory element is rejected, switches to a state where the wireless communication is permitted.