No way! You mean the PWM signals from our robot controllers cant work directly with the LMD18201 chip? The spec sheet on page 6 right under the Logic Truth Table states the types of PWM signals. I am thinking that our robot controller is the Simple, locked anti-Phase PWM type. As apposed to the Sign/magnitude PWM type.
it says that I can attache the PWM pin to logic High, and put in my PWM signal into the Direction pin. this way I only need a single PWM signal to indicate direction and magnitude.