15.4.4.3.1 Clock Divider
A common clock divider circuit is available for use by all PWM Generators and allows a PWM Generator to be operated at a low frequency. Four different divider ratios may be selected using the DIVSEL[1:0] control bits (PCLKCON[5:4]). The clock divider circuit remains in a Low-Power state if none of the PWM Generators have requested it.