DRV8871-Q1: How to PWM the driver?

Part Number:DRV8871-Q1

Hi,

I failed to understand where exactly I do activate the PWM

If for example, I need to 75% PWM the motor CW direction how should the IN1 and IN2 driven and to what pin of the driver the PWM wave from the MCU should be connected?

and the same question for 75% PWM but CCW rotation direction.

M.Hooper