Some embodiments include apparatus and methods using clock generation circuitry to generate a first clock signal and a second clock signal based on an input clock signal, the first and second clock signals having different phases, sampler circuitry to sample an input signal based on timing of the first and second clock signals and provide data information and error information associated with sampling of the input signal, a clock and data recovery unit to generate first control information based on the data information and the error information, and a phase error detection unit to generate second control information based on the data information and the error information, the clock generation circuitry to control timing of the input clock signal based on the first control information and to control timing of the first and second clock signals based on the second control information.