Patent ID: 8909971

Claim:
An electronic system for analyzing a set of periphery clock signals based on a monitor clock of the set of periphery clock signals and providing information about the set of periphery clock signals, comprising: a clock generation unit adapted to receive an external clock signal, derive the set of periphery clock signals based on the external clock signal, and select one of the periphery clock signals as the monitor clock; an internal clock generator adapted to generate an auxiliary clock signal independently of the external clock signal; an activity unit adapted to detect the presence of the monitor clock based on the auxiliary clock signal and detect the presence of the auxiliary clock signal based on the monitor clock, the activity unit includes a monitor clock missing unit clocked by the auxiliary clock signal and continuously reset by the monitor clock; and a deviation unit adapted to detect clock faults in the monitor clock based on the auxiliary clock signal in case that the auxiliary clock signal and the monitor clock are present and adapted to check the remaining clocks in the set of periphery clocks based on the monitor clock, if the monitor clock is present and no clock faults have been detected.