Input/output circuit, operation method thereof and data processing system including the same

An operation method of an input/output circuit, comprising the steps of:

• precharging a first setup node and a second setup node, to which differential input data is loaded, based on the differential input data during a precharging operation;
• loading the differential input data to the first and second setup nodes during a loading operation;
• and
• comparing and amplifying the data of the first and second setup nodes and outputting the amplified data during an output operation.

A data processing system comprising:

• a host device configured to provide differential input data and data frequency information;
• and
• a data processing device configured to input and output the differential input data based on a data strobe clock with a duty rate that corresponds to the data frequency information,
• wherein the data processing device comprises:
• a clock generation circuit configured to adjust the duty rate of the data strobe clock and generate a final data strobe clock based on the data frequency information;
• and
• an input/output circuit comprising an input circuit configured to load the differential input data to setup nodes based on the final data strobe clock, an amplifier circuit configured to amplify the data that is loaded to the setup nodes and configured to output the amplified data, and a precharging circuit configured to precharge the setup nodes based on the final data strobe clock and the differential input data.

The data processing system according to claim 14, wherein the setup nodes comprise a first setup node and a second setup node, and

• wherein the input circuit loads a primary input data that is included in the differential input data to the first setup node, and loads a secondary input data that is included in the differential input data to the second setup node. 16, The data processing system according to claim 15, wherein the precharging circuit comprises:
• a first precharging circuit configured to precharge the first setup node based on the final data strobe clock and the primary input data;
• and
• a second precharging circuit configured to precharge the second setup node based on the final data strobe clock and the secondary input data.

The data processing system according to claim 14, further comprising an output circuit configured to receive an output signal of the amplifier circuit and generate a final output signal. 19, The data processing system according to claim 18, wherein the differential input data comprise a primary input data and a secondary input data, and the amplifier circuit outputs a primary output signal that corresponds to the primary input data and a secondary output signal that corresponds to the secondary input data,

• wherein the output circuit comprises:
• a first output circuit configured to generate a final secondary output signal that corresponds to the secondary output signal;
• and
• a second output circuit configured to generate a final primary output signal that corresponds to the primary output signal.