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METHOD FOR OPERATING A DATA INTERFACE CIRCUIT WHERE A CALIBRATION CONTROLLER CONTROLS BOTH A MISSION PATH AND A REFERENCE PATH
METHOD FOR OPERATING A DATA INTERFACE CIRCUIT WHERE A CALIBRATION CONTROLLER CONTROLS BOTH A MISSION PATH AND A REFERENCE PATH
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机译:在校准路径既控制任务路径又参考路径的情况下操作数据接口电路的方法
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摘要
Circuits and methods for implementing a continuously adaptive timing calibration training function in an integrated circuit interface are disclosed. A mission data path is established where a data bit is sampled by a strobe. A similar reference data path is established for calibration purposes only. At an initialization time both paths are calibrated and a delta value between them is established. During operation of the mission path, the calibration path continuously performs calibration operations to determine if its optimal delay has changed by more than a threshold value. If so, the new delay setting for the reference path is used to change the delay setting for the mission path after adjustment by the delta value. Circuits and methods are also disclosed for performing multiple parallel calibrations for the reference path to speed up the training process.
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