Yes I have the datasheet. It says:-
GND – connect to GND on controlling board
DIR – Pulled down to GND Forward by default and Backward when 5V (logic high)
PWM – Pulse Widht Modulation input to control speed of motor (recommended freq 20Hz to
400Hz)
BRK – breaking input to halt the motor in operations when 5V (logic high)
5V – regulated 5V output from motor driver board (maximum 50mA supply)