Patent ID: 8756027

Claim:
A method comprising: selecting, from a plurality of delay registers corresponding to a plurality of respective delay time values, a selected delay time value, the plurality of respective delay time values previously used to correct a previous clock skew for sampling a previous signal received on a data input line; sampling, using a normal data sampler, a first value from a portion of a signal received on the data input line; sampling, using an eye monitor data sampler, a second value from the portion of the signal, the sampling of the second value based on a modified phase offset used to correct a clock skew, the modified phase offset corresponding to the selected delay time value; comparing the first value and the second value to determine if the first value and the second value match; responsive to determining that the first value and the second value match, storing an indication of the delay register from which the selected delay time value was selected, the indication identifying that the selected delay time value is to be used in setting a phase offset effective to correct the clock skew for sampling the signal.