How to wire an LMD18200 and an arduino?
Most basic way would be to use only DIR, PWM and Break.

Use Break as enable (put high at begining of the program, put low when you want to start rotation).

Use Dir to change rotation of the motor (usually high is CV, low is CCV, but you need to check the datasheet)

And hook up PWM to PWM pin on arduino. This will control the speed.