[DeTomaso] PWM Power Supplies

[Ken Green]

Guys,
 
    Just in case someone is familiar with these, I have MSD PWM power suppy.  I'd like to use it to control an electric water pump, maybe fuel pump, water/alcohol pump.  The MSD Tech guy said the control signal interface is:
 
"a positive square wave, 20 degree duration at battery voltage amplitude"
 
Is this a basic type of signal that I can get a processor to generate for general use?
 
Ken