| 主权项 |
1. A crystal-less clock data recovery circuit module, comprising:
a clock data recovery circuit, configured to output a data recovery stream and a data recovery clock; a frequency comparison circuit, coupled to the clock data recovery circuit, wherein the frequency comparison circuit is configured to compare a frequency difference between the data recovery clock and a clock signal to adjust a frequency of the clock signal based on a comparison result; and a signal detection circuit, coupled to the frequency comparison circuit and configured to receive and detect a first signal, wherein the signal detection circuit determines whether to enable the frequency comparison circuit according to a detection result, wherein the clock data recovery circuit comprises: a frequency generation circuit, coupled to the frequency comparison circuit and configured to generate the clock signal and output a control signal according to the comparison result; and a clock generation circuit, coupled to the frequency generation circuit and configured to generate the data recovery clock with reference to the clock signal, wherein the frequency generation circuit comprises: a reference clock generation circuit, configured to generate and output a reference clock; and a phase-locked loop circuit, coupled to the frequency comparison circuit, wherein the phase-locked loop circuit is controlled by the control signal and configured to generate the clock signal according to the control signal and the reference clock. |
