1. A nonvolatile memory device having a write mode of operation, comprising: a write/read controller configured to selectively control write/read control signals enabled in the write mode; a nonvolatile resistive memory device coupled to receive write/read control signals from the write/read controller; and a logic switch having two or more switching states configured to select among the switching states depending on a logic value stored in the nonvolatile resistive memory device when the write/read control signals are disabled.