33.3 Pulse Frequency Mode

In Pulse Frequency (PF) mode, the output becomes active on the rising clock edge immediately following the overflow event and goes inactive 1 to 128 clock periods later, determined by the PWS bits. This provides a pulsed output at the FOVERFLOW frequency. For more information, refer to the figure above.
Important: When the selected pulse width is greater than the accumulator overflow time frame, then the NCO output does not toggle.

The level of the Active and Inactive states is determined by the POL bit.

PF mode is selected by setting the PFM bit.