Memory device and operation method thereof
AssigneeSamsung Electronics Co., Ltd.
InventorsHye Jung Kwon, Seungjun Bae, Yongjae Lee, Young-Sik Kim, Young-Ju Kim, Suyeon Doo, Yoon-Joo Eom
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Abstract
A memory device includes memory cell array including a plurality of memory cells that store data, a first transmitter that transmits the data to an external device through a first data line, and a ZQ controller that performs a ZQ calibration operation to generate a first ZQ code for impedance matching of the first data line. The first transmitter encodes the first ZQ code and the first data based on a first clock and drives the first data line based on the encoded result based on a second clock.
Claims20
A memory device comprising:
- a memory cell array including a plurality of memory cells configured to store a first data;
- a first transmitter configured to transmit the first data to an external device through a first data line;
- and
- a ZQ controller configured to perform a ZQ calibration operation to generate a first ZQ code,
- wherein the first transmitter is configured to:
- encode the first ZQ code and the first data based on a first clock;
- and
- drive the first data line based on the encoded result based on a second clock.
An operation method of a memory device, the method comprising:
- encoding data and a ZQ code based on a first clock to generate pull-up data and pull-down data;
- serializing the pull-up data and the pull-down data based on a second clock;
- and
- driving a first data line based on the serialized pull-up data and the serialized pull-down data.
A memory device comprising:
- a memory cell array including a plurality of memory cells configured to store data;
- a data line driver configured to provide the stored data to an external device through a plurality of data lines;
- and
- a ZQ controller configured to generate a ZQ code associated with each of the plurality of data lines,
- wherein the data line driver is configured to:
- encode the ZQ code and the data based on a first clock to generate pull-up data and pull-down data, with respect to each of the plurality of data lines;
- serialize the pull-up data and the pull-down data based on a second clock;
- and
- respectively drive the plurality of data lines based on the serialized pull-up data and the serialized pull-down data.
Dependencies are inferred from the claim text.