Patent ID: 11960739
Assignee: APPLE INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method comprising:
performing, using a calibration circuit, a plurality of horizontal calibrations at different reference voltage values to determine a calibrated reference voltage, wherein the reference voltage values are used to distinguish between logic values read from a memory by a memory controller, and wherein ones of the plurality of horizontal calibrations comprise determining a range of delay values applied to a data strobe signal at which valid data is read from the memory;
determining, using the calibration circuit, scores corresponding to ones of the plurality of horizontal calibrations, wherein a score for a particular one of the plurality of horizontal calibrations is based on a corresponding range of delay values and a reference voltage margin; and
selecting, using the calibration circuit, the calibrated reference voltage based on the scores corresponding to ones of the plurality of horizontal calibrations.