Patent ID: 6981189

Claim:
An interface circuit comprising: a data input/output terminal that includes a first terminal for inputting/outputting a first signal component of a differential signal, and a second terminal for inputting/outputting a second signal component of the differential signal, the second signal component having a phase reverse to that of the first signal component of the differential signal; a data driver for outputting data through said data input/output terminal; a data receiver for fetching data through said data input/output terminal; a detection circuit for detecting a stoppage of data transmitting/receiving by detecting predetermined states of potentials respectively at the first and second terminals; a correction circuit for outputting a control signal when a detection result of said detection circuit shows the stoppage of data transmitting/receiving; and a terminator connected to the data input/output terminal and receiving the control signal from the correction circuit, the terminator having a resistance value that is corrected in response to the control signal.