Processing method for data in a mixed-timing system, whereby a third clock signal is formed from the second data processing clock signal by application of a delay and a test signal is generated based on signal flank positions

摘要

Method for processing data from a data source (10) that operates using a first clock signal (CLK1) at a rate set by a second clock signal (CLK2) whereby: the second clock signal is delayed by a preset delay time (td1) to provide a third clock signal (CLK21) which is then used to process data; the temporal position of a given flank of the first signal is evaluated referenced to a first flank of the third clock signal; and a test signal (CS) is provided that takes a first or second value dependent on whether flanks of the first and third clock signals lie within a predefined time window. The invention also relates to a corresponding circuit arrangement for generating a test signal.