Are there any notes to observe when switching to the main clock from the on-chip oscillator clock?
Switch to the main clock from the on-chip oscillator clock under the following conditions:
- The main clock is oscillating stably.
- The CM06 bit is "1" (divide-by-8 mode).
In addition, the CM15 bit must be set to "1" (oscillation drive capability = High) until the main clock oscillates stably.