MEMORY DEVICE, METHOD OF CALIBRATING SIGNAL LEVEL THEREOF, AND MEMORY SYSTEM HAVING THE SAME

MEMORY DEVICE, METHOD OF CALIBRATING SIGNAL LEVEL THEREOF, AND MEMORY SYSTEM HAVING THE SAME

A method of calibrating a signal level of a memory device includes performing pull-up code and pull-down code calibrations, using a ZQ calibration for non-return-to-zero (NRZ) signaling, performing a most significant bit (MSB) code calibration, using an MSB additional driver for pulse amplitude modu...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: Park, Jaewoo, Um, Youngdo, Choi, Youngdon, Choi, Junghwan, Son, Younghoon
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
INFORMATION STORAGE
PHYSICS
STATIC STORES
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:A method of calibrating a signal level of a memory device includes performing pull-up code and pull-down code calibrations, using a ZQ calibration for non-return-to-zero (NRZ) signaling, performing a most significant bit (MSB) code calibration, using an MSB additional driver for pulse amplitude modulation level-4 (PAM4) signaling, and performing a least significant bit (LSB) code calibration using an LSB additional driver for the PAM4 signaling.