APPARATUSES AND METHODS FOR IMPEDANCE CONTROL (ZQ) CALIBRATION

APPARATUSES AND METHODS FOR IMPEDANCE CONTROL (ZQ) CALIBRATION

An apparatus and method for ZQ calibration, including determining a strong driver circuit and a weak driver circuit, which are related to an input/output (I/O) circuit connected to a signal pin, at power-up of the I/O circuit; providing a ZQ calibration code related to a sweep code to one from among...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: PARK, Jungjune, YOON, Chiweon, KANG, Kyoungtae, JEONG, Byunghoon, SHIN, Dongho, LEE, Junha
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
INFORMATION STORAGE
PHYSICS
STATIC STORES
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Beschreibung
Zusammenfassung:An apparatus and method for ZQ calibration, including determining a strong driver circuit and a weak driver circuit, which are related to an input/output (I/O) circuit connected to a signal pin, at power-up of the I/O circuit; providing a ZQ calibration code related to a sweep code to one from among the strong driver circuit and the weak driver circuit according to ZQ calibration conditions; and providing a ZQ calibration code related to a fixed code to an unselected circuit, thereby adjusting a termination resistance of the signal pin.