Peripherals are controlled by the CPU through configuration, task, and event registers. Task registers are inputs, enabling the CPU and other peripherals to initiate a functionality. Event registers are outputs, enabling a peripheral to trigger tasks in other peripherals or the CPU by tying events to CPU interrupts.
The distributed programmable peripheral interconnect (DPPI) feature enables peripherals to connect events to tasks without CPU intervention. For more information on DPPI and the DPPI channels, see DPPI — Distributed programmable peripheral interconnect.