C8051F850-C-GM Datasheet, PDF (173/328 Pages) Silicon Laboratories – Low-Cost 8-bit MCU Family with up to 8 kB of Flash

disable the comparison, and prevent the match edge from occuring. Note that although the PCA0CPn
compare register determines the duty cycle, it is not always appropriate for firmware to update this register
directly. See the sections on 8 to 11-bit and 16-bit PWM mode for additional details on adjusting duty cycle
in the various modes.
Duty Cycle
=
(_---2---^N_{-----–----P----C---A-----0---C----P---n----})
2^N
Equation 20.2. N-bit Edge-Aligned PWM Duty Cycle With CEXnPOL = 0 (N = PWM resolution)
Duty Cycle = ^{P----C----A----0---C----P----n-}
2^N
Equation 20.3. N-bit Edge-Aligned PWM Duty Cycle With CEXnPOL = 0 (N = PWM resolution)
Rev. 1.0
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