8.1.1.2 Clocks

All clocks are controlled by the PMC, which is a part of the system controller.

AES, TDES, SHA and TRNG are located on APB Client (APS) matrix, clocked by MCK6. CPKCC and OTPC are located on APB0 on CPU System and Security (CSS) matrix, clocked by MCK0. ICM and TZAESB are located on AHB System (HSS) matrix, clocked by MCK5.

Note: The MCK0 frequency is directly related to the CPU clock, so any change on the CPU clock impacts MCK0.

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