On-die termination circuit, operating method thereof, and semiconductor system
Number of patents in Portfolio can not be more than 2000
United States of America
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Apr 5, 2022
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N/A
app pub date -
Feb 26, 2021
filing date -
Feb 26, 2021
priority date (Note) -
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Abstract
An on-die termination circuit may include a resistance combination circuit, a first calibration circuit, a second calibration circuit, and a termination circuit. The resistance combination circuit may have an additional resistance value for setting a combined resistance value by combining the additional resistance value with a reference resistance value, and may be configured to set the additional resistance value based on a second calibration code. The first calibration circuit may be configured to generate a first calibration code corresponding to the reference resistance value or the combined resistance value according to a calibration sequence. The second calibration circuit may be configured to generate the second calibration code corresponding to the first calibration code. The termination circuit may be coupled to an input/output pad, and may be configured to set a termination resistance value corresponding to the first and second calibration codes.
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