Final answer:
The question falls under Engineering, specifically concerning PWM and timer settings. To find the CnV value that achieves a 65.7% duty cycle at a PWM frequency of 5.5kHz using an 8MHz clock with specific timer settings, we must use the formula involving the desired duty cycle and the period of the PWM, which is affected by the given prescaler and frequency settings.
Step-by-step explanation:
The subject of this question is Engineering, specifically concerning Pulse Width Modulation (PWM) in the context of timers and clock frequencies. In this scenario, we're given an 8MHz timer clock, with SC (Prescale value) of 8, CnSC (which typically refers to a register or a value within a controller that sets the frequency of the PWM) at 40, and we want a PWM frequency of 5.5kHz. To determine the required CnV value that produces a duty cycle of 65.7%, we would need additional information such as the specific timer or microcontroller being used as the method of calculation can differ based on hardware. However, generally, the CnV value is calculated using the formula CnV = (DutyCycle / 100) * (Period of PWM), where Duty Cycle is expressed as a percentage and the Period of PWM is derived from the timer settings and the desired PWM frequency.