Information processing system including semiconductor device having self-refresh mode
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United States of America Patent
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Feb 14, 2017
Grant Date -
Nov 20, 2014
app pub date -
Aug 4, 2014
filing date -
Jul 28, 2011
priority date (Note) -
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Abstract
A method for controlling termination impedance of a data terminal in a dynamic random access memory device includes receiving a mode register set command to set an operation mode to a first mode, setting the operation mode in a mode register to the first mode, receiving a self-refresh entry command, entering self-refresh mode, activating a first input buffer connected to a termination impedance control terminal, and receiving an impedance control signal at the first buffer, wherein the termination impedance of the data terminal is set to a first impedance value if the termination impedance control signal has a first level and the termination impedance of the data terminal is set to a second impedance value if the termination impedance control signal has a second level.
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