# HFINTOSC

The High-Frequency Internal Oscillator (HFINTOSC) is a precision digitally-controlled internal clock source that produces a stable clock up to 64 MHz. The HFINTOSC can be enabled through one of the following methods:

• Programming the RSTOSC<2:0> bits in Configuration Word 1 to ‘110’ (FOSC = 1 MHz) or ‘000’ (FOSC = 64 MHz) to set the oscillator upon device Power-up or Reset.
• Write to the NOSC<2:0> bits during run-time.

The HFINTOSC frequency can be selected by setting the HFFRQ<3:0> bits.

The NDIV<3:0> bits allow for division of the HFINTOSC output from a range between 1:1 and 1:512.