Provided are a circuit and a method for transforming a data inputoutput format of a semiconductor memory device which is capable of generating various types of data patterns when the number of memory cells connected to one column selection line is greater than the number of data input pins. 05 \u03bcm and an equivalent-circle diameter of 0. A detector is provided for detecting a proximity of the device to the wheel hub, and a transmitter is provided for sending an alarm signal in the event that the detector detects that the device is no longer in proximity to the wheel hub.