This bit field configures the fractional adjustment of the on time or off time, according to the Dither Selection (DITHERSEL) bit field in the Dither Control (TCDn.DITCTRL) register. The DITHER value is added to a 4-bit accumulator at the end of each TCD cycle. When the accumulator overflows, the frequency adjustment will occur.

The DITHER bit field is double-buffered, so the new value is copied when an update condition occurs.