Disclosed is a nonvolatile memory, which includes a plurality of input/output pads connectable to a plurality of data lines, an enable input pad, an enable output pad, and a chip address initialization circuit. The chip address initialization circuit receives a current chip address through the plurality of input/output pads, stores the current chip address in response to a current enable signal received through the enable input pad, outputs a next enable signal through the enable output pad, and outputs a next chip address through the plurality of input/output pads.