This Stepper motor driver can operate in five different modes: We will go into details of the pin description of the A4988 motor driver in the next section. The controlling scheme of the A4988 motor controller for stepper motor is quite simple as compared to the L298N motor driver as it utilizes only two pins for controlling the stepper motor, one pin control the steps of the Stepper Motor and the other pin control the direction of the Stepper Motor. The A4988 motor controller is the micro-stepping driver for controlling the Bipolar Stepper motor.