PWM Comparator Register 0
| CMR | PWM Comparator Register CNR determines the PWM duty. PWM frequency = PWMxy_CLK/(prescale+1)/(clock divider)/(CNR+1); where xy, could be 01, 23, 45 or 67, depends on selected PWM channel. Duty ratio = (CMR+1)/(CNR+1). CMR >= CNR: PWM output is always high. CMR < CNR: PWM low width = (CNR-CMR) unit; PWM high width = (CMR+1) unit. CMR = 0: PWM low width = (CNR) unit; PWM high width = 1 unit (Unit = one PWM clock cycle) Note: Any write to CNR will take effect in next PWM cycle. |