On-die termination circuit and the driving method thereof
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An on-die termination circuit and a driving method thereof are provided to offer a termination resistance with high resolution while reducing the load in the aspect of area. A control unit(800) generates a plurality of control signals in response to a driving signal. A termination resistance supply unit(500,700) includes a first resistor part for supplying a first code resistor corresponding to a coarse-code signal of plural bits and a second resistor part for supplying a second code resistor corresponding to a fine-code signal of plural bits, and supplies termination resistance by connecting the first resistor part and the second resistor part serially. A code signal generation unit controls the fine-code signal and the coarse-code signal in order for the termination resistance to have a level corresponding to input resistance in response to the plurality of control signals.