23.3.1.1 Configure the clock CLK_RTC
To configure CLK_RTC, follow these steps:
- Configure the desired oscillator to operate as required, in the Clock Controller peripheral (CLKCTRL).
- Write the Clock Select bits (CLKSEL) in the Clock Selection register (RTC.CLKSEL) accordingly.
The CLK_RTC clock configuration is used by both RTC and PIT functionality.