| 摘要 |
A semiconductor integrated circuit device which includes a termination circuit for terminating a bus line. An impedance control circuit controls impedance of the termination circuit in accordance with impedance of an external reference resistor, so as to have the same or substantially the same impedance as that of the external reference resistor. A detection circuit detects whether the external reference resistor is electrically connected to the semiconductor integrated circuit, and disables the impedance control circuit based on a detection result.
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