Clock monitor and system on chip including the same

摘要

A system on chip includes a plurality of function blocks configured to perform predetermined functions, respectively, a clock control unit configured to generate a plurality of operating clock signals that are provided to the plurality of function blocks, respectively, a clock monitor configured to monitor frequencies of the operating clock signals to generate an interrupt signal, and a processor configured to control the frequencies of the operating clock signals based on the interrupt signal. The clock monitor includes a selector configured to select one of the operating clock signals to provide a selected clock signal, a frequency detector configured to detect a frequency of the selected clock signal to provide a detection frequency, and an interrupt generator configured to generate the interrupt signal based on the detection frequency, where the interrupt signal indicates a frequency abnormality of the operating clock signal corresponding to the selected clock signal.

主权项

1. A clock monitor comprising:
a selector configured to select one of a plurality of operating clock signals to provide a selected clock signal, the plurality of operating clock signals being provided to a plurality of function blocks, respectively; a frequency detector configured to detect a frequency of the selected clock signal to provide a detection frequency; and an interrupt generator configured to generate an interrupt signal based on the detection frequency, the interrupt signal indicating a frequency abnormality of the operating clock signal corresponding to the selected clock signal.