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US 6,316,980 B1Granted
Calibrating data strobe signal using adjustable delays with feedback
AssigneeIntel Corporation
InventorsPete D. Vogt, John F. Zumkehr
Life of this patent
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Abstract
In one embodiment of the invention, a delay circuit generates a plurality of delay strobe signals from a plurality of data strobe signals during an operational mode and a calibration signal from a reference signal by an interval during a calibration mode. The plurality of delay strobe signals clocks a plurality of data into a plurality of registers. A calibrator adjusts the interval according to a timing relationship between the calibration signal and the reference signal.
Claims24
An apparatus comprising:
- a delay circuit to generate a plurality of delay strobe signals from a plurality of data strobe signals during an operational mode and a calibration signal from a reference signal by an interval during a calibration mode, the plurality of delay strobe signals clocking a plurality of data into a plurality of registers;
- and
- a calibrator coupled to the delay circuit to adjust the interval according to a timing relationship between the calibration signal and the reference signal.
A method comprising:
- generating a plurality of delay strobe signals from a plurality of data strobe signals during an operational mode and a calibration signal from a reference signal by an interval during a calibration mode, the plurality of delay strobe signals clocking a plurality of data into a plurality of registers;
- and
- adjusting the interval according to a timing relationship between the calibration signal and the reference signal.
A circuit comprising:
- a plurality of registers to receive a plurality of data;
- and
- a delay controller coupled to the plurality of registers, the delay controller comprising:
- a delay circuit to generate a plurality of delay strobe signals from a plurality of data strobe signals during an operational mode and a calibration signal from a reference signal by an interval during a calibration mode, the plurality of delay strobe signals clocking the plurality of data into the plurality of registers, and
- a calibrator coupled to the delay circuit to adjust the interval according to a timing relationship between the calibration signal and the reference signal.
2 more elements
Dependencies are inferred from the claim text.