68.6.7.5 Changing the Comparison Value and the Comparison Configuration
It is possible to change the comparison values and the comparison configurations while the channel 0 is enabled (see PWM Comparison Units).
To prevent unexpected comparison match, the user must use the PWM Comparison x Value Update Register (PWM_CMPVUPDx) and the PWM Comparison x Mode Update Register (PWM_CMPMUPDx) to change, respectively, the comparison values and the comparison configurations while the channel 0 is still enabled. These registers hold the new values until the end of the comparison update period (when CUPRCNT is equal to CUPR in PWM Comparison x Mode Register (PWM_CMPMx) and the end of the current PWM period, then update the values for the next period.
CAUTION: The write of the register PWM_CMPVUPDx must be followed by a write of the
register PWM_CMPMUPDx.
Note: If the update registers PWM_CMPVUPDx and PWM_CMPMUPDx are written several times between
two updates, only the last written value are taken into account.
