16.7 Clocks after Reset
On any Reset the synchronous clocks start to their initial state:
- OSC16M is enabled and configured to run at 4MHz
- Generic Generator 0 uses OSC16M as source and generates GCLK_MAIN
- CPU and BUS clocks are undivided
On a Power-on Reset, the 32KHz clock sources are reset and the GCLK module starts to its initial state:
- All Generic Clock
Generators are disabled except
- Generator 0 is using OSC16M at 4MHz as source and generates GCLK_MAIN
- All Peripheral Channels in GCLK are disabled
On a User Reset the GCLK module starts to its initial state, except for:
- Generic Clocks that are write-locked, i.e., the according WRTLOCK is set to 1 prior to Reset
References: