20.6.5.1.1 Enabling

The DFLL48M is enabled as follows:

  1. Disable the On Demand mode (DFLLCTRL.ONDEMAND = 0).
  2. Configure the DFLLCTRL register except DFLLCTRL.ENABLE (DFLLCTRL.ENABLE = 0).
  3. Wait for STATUS.DFLLRDY to ensure the DFLLCTRL register synchronization is complete.
  4. Enable the DFLL48M (DFLLCTRL.ENABLE = 1).
  5. Wait for STATUS.DFLLRDY to ensure the DFLLCTRL register synchronization is complete.
  6. Enable the On Demand mode if required (DFLLCTRL.ONDEMAND = 1).
  7. Wait for STATUS.DFLLRDY to ensure the DFLLCTRL register synchronization is complete.