12.3.4.1.1 Internal High-Frequency Oscillator (OSCHF)

The OSCHF supports output frequencies of 1, 2, 3, and 4 MHz and multiples of four, up to 24 MHz, which can be used as the main clock or peripheral clock. The OSCHF also supports a separate fixed 4 MHz output to the Phase-Locked Loop (PLL48M).