The MC33192 Stepper Motor Controller is intended to control loads in harsh automotive environments using a serial communication bus. The MIBus can provide satisfactory real time control of up to eight stepper motors. MIBus technology offers a noise immune system solution for difficult control applications involving relay drivers, motor controllers, etc. The MC33192 stepper motor controller provides four phase signals to drive two phase motors in either half or full step modes. When used with an appropriate Motorola HCMOS microprocessor it provides an economical solution for applications requiring a minimum amount of wiring and optimized system versatility.