Interface circuit has calibration circuit, sampling signal, data signal delay circuit, and minimum delay time that is in calibration circuit, which is displaced between data signal and sampling signal

摘要

The interface circuit (10) has a calibration circuit for automatic detecting of a valid data window of a data signal and adjusting of an optimal delay of a sampling signal. A data signal delay circuit for delaying the data signal at a delay time, which fulfill a certain equation. The minimum delay time is in the calibration circuit, which is displaced between the data signal and the sampling signal and is the setup-time of the data signal.