The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 23, 2024
Filed:
Jul. 22, 2022
Changxin Memory Technologies, Inc., Hefei, CN;
CHANGXIN MEMORY TECHNOLOGIES, INC., Hefei, CN;
Abstract
A calibration control circuit includes an off-chip calibration circuit, an on-chip calibration circuit and a mode switching circuit. The off-chip calibration circuit is configured to receive and store a first calibration code sent by a user. The on-chip calibration circuit is configured to receive an enable signal and perform a ZQ self-calibration process on the memory to obtain a second calibration code adapted to a current environmental parameter when the enable signal is in an active state. The mode switching circuit is configured to receive a calibration mode signal, the first calibration code and the second calibration code, and determine the first calibration code as a ZQ calibration code when the calibration mode signal indicates an off-chip calibration mode, or, determine the second calibration code as the ZQ calibration code when the calibration mode signal indicates an on-chip calibration mode.