ATmega328PB

11.1.1 CPU Clock – clk_CPU

The CPU clock is routed to parts of the system concerned with operation of the AVR core. Examples of such modules are the general purpose register file, the Status register, and the data memory holding the stack pointer. Halting the CPU clock inhibits the core from performing general operations and calculations.

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ATmega328PB

11.1.1 CPU Clock – clkCPU

11.1.1 CPU Clock – clk_CPU