Clock data recovery circuit, timing controller including the same, and method of driving the timing controller

Abstract

Provided is a clock data recovery circuit including a phase-frequency detector configured to detect a frequency and phase of a reference clock signal and control a frequency and phase of an internal clock signal based on the detected frequency, a frequency detector configured to detect a frequency of a data signal and, based on the detected frequency of the data signal, adjust the frequency of the internal clock signal; and a phase detector configured to detect a phase of the data signal based on the detected frequency of the data signal and adjust the phase of the internal clock signal. Accordingly, a timing controller that includes the clock data recovery circuit is capable of establishing data communication at high speeds when the system is powered on/off to reduce power consumption. Also, the timing controller does not need to include an additional external clock generation device, and is capable of achieving frequency synchronization using a non-precision clock signal generated in the timing controller.