1. Both of the methods, I believe, doesn't generate noise. I'd use a timer to trigger ADC. If, in future, you want to take more/less samples, then you don't have to worry about changing PWM Frequency that may affect your application. If you've a timer that's free, please use it. 2. WDT is independent of TIMER_A1. It won't affect PWM generation even if they share same clock. 3. PWM, as you may've already known, will vary duty cycle on a pin. You can connect LED's, for example, to vary brightness. Or you can simply go to that particular ISR(Of PWM) and do any operation. Yes. It'll effect MOSFET switching(Ton and Toff) if you connect them. I highly recommend you complete this training before you move any further. I'd greatly help you understand MSP. It does have a chapter about PWM, WDT. Teja
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