I own a SAM E54 Xplained Pro and a custom board.
The custom board is battery-powered and is designed to repeat normal operation and sleep.
In order to reduce the current consumption during sleep,
I want to switch the CPU clock between 120MHz for normal operation and 30MHz for sleep, but I cannot change the clock.
Please give me advice.
For clock switching, refer to this procedure (SAM D5x / E5x Family Data Sheet DS60001507G-page 705).