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:
Dec. 22, 2020
Filed:
Jun. 19, 2018
Apple Inc., Cupertino, CA (US);
Rakesh L. Notani, Santa Clara, CA (US);
Lakshmi Narasimha Murthy Nukala, Pleasanton, CA (US);
Kai Lun Hsiung, Fremont, CA (US);
Sukalpa Biswas, Fremont, CA (US);
Yanzhe Liu, Sunnyvale, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
A method and apparatus for optimizing calibrations of a memory subsystem is disclosed. A memory controller of a memory subsystem includes a memory interface suitable for coupling to a DRAM having a plurality of banks. The memory controller includes a state machine the state machine may initiate calibration of circuitry within the memory controller. Responsive to initiating the calibration, the state machine also causes a refresh command to be transmitted to the DRAM. The calibration is then performed concurrent with the refresh of the DRAM. Subsequent to transmitting the refresh command, the state machine causes the memory interface to be placed into a low power state.