METHOD AND DEVICE FOR DETECTING THE ABSENCE OF A PERIODIC SIGNAL

摘要

A method and device may determine the absence of a periodic signal or the absence of an edge of the periodic signal. The periodic signal may be a transmitted clock signal in a forwarded clock architecture. The periodic signal may be delayed by a fixed phase difference to produce a delayed periodic signal. The phase difference between the periodic signal and the delayed periodic signal may be determined. If the determined phase difference is above or below the fixed phase difference by a predetermined amount or more the periodic signal may be missing an edge. If the absence of the periodic signal or the absence of the edge of the periodic signal is detected, an error signal may be asserted. The error signal may be an in-band reset signal.