High precision, multiple output modes: IIC, PWM, voltage, etc.
VCC: 3.3V;GND: power ground;
Out: PWM/analog voltage output;
DIR: Direction of rotation (Ground Clockwise value increases; Connect to VCC Clockwise value decreases);
SCL: IIC communication clock line;SDA: IIC communication data line;
GPO: Mode Select (internal pullup, ground programming mode B)