Datasheet
2017 Microchip Technology Inc. DS60001516A-page 273
SAM9G20
25.8.2 Clock Switching Waveforms
Figure 25-3: Switch Master Clock from Slow Clock to PLL Clock
Figure 25-4: Switch Master Clock from Main Clock to Slow Clock
Slow Clock
LOCK
MCKRDY
Master Clock
Write PMC_MCKR
PLL Clock
Slow Clock
Main Clock
MCKRDY
Master Clock
Write PMC_MCKR