26.5.1 Initialization
To operate the PIT, follow these steps:
- Configure the RTC clock CLK_RTC as described in section 26.4.1.1 Configure the Clock CLK_RTC.
- Enable the interrupt by writing a ‘1’ to the Periodic Interrupt (PI) bit in the PIT Interrupt Control (RTC.PITINTCTRL) register.
- Select the period for the interrupt and enable the PIT by writing the desired value to the PERIOD bit field and a ‘1’ to the PIT Enable bit (PITEN) in the PIT Control A register (RTC.PITCTRLA).