Hello @PSing.8 and welcome to ST Community
Please precise some details in your question so we can help you!
Start with what's your application? which product? environment ?..
In general, the idle state of a PWM signal refers to the state of the signal when no power is being delivered to the load.
The high side means the state when the pulse is on or active
the low side is the state when the pulse is off or inactive.
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