12.4.1 Initialization

Before enabling peripherals within the system, the system clock frequency must be configured by performing the following steps:
  1. Write the value of the desired frequency to the Frequency Select bit field in the OSCHF Control register (OSCHF.FRQSEL).
  2. Wait for the OSCHF is Ready bit (OSCHFRDY) in the Interrupt Flag Status and Clear register (INTFLAG) to be set, then clear the bit.