SPRUIV7B May 2022 – September 2023 AM620-Q1 , AM623 , AM625 , AM625-Q1 , AM625SIP
The Dual Clock Comparator (DCC) is used to determine the accuracy of a clock signal during the time execution of an application. Specifically, the DCC is designed to detect drifts from the expected clock frequency. The desired accuracy can be programed based on calculation for each application. The DCC measures the frequency of a selectable clock source using another input clock as a reference. Internal 12.5 MHz RC oscillator clock is used to validate HFOSC0_CLKOUT. Then HFOSC0_CLKOUT (most accurate clock) is used to validate/track all other clocks in the device. An additional use of this module is to measure the frequency of a selectable clock source, using an external input clock source of known frequency (MCU_EXT_REFCLK0, EXT_REFCLK1 pins). There is one instance of DCC module in MCU domain and seven instances of DCC modules in Main domain to monitor critical clocks. Refer to DCC chapter for details.