A Unipolar Stepper Motor Drive Using The Z8 Encore! ® Mcu

Stepper motors that feature unipolar drives are widely used in applications that require high torque loads and fast position attainment. The unipolar operation provides stable Motor Control using a rel- atively simple firmware, as compared to bipolar drives. This Application Note discusses the use of a typi- cal 8-wire or 6-wire stepper motor, in the unipolar mode of operation, with a Z8 Encore! ® microcon- troller. Also discussed are the practical aspects of the full- step and half-step methods of driving a stepper motor, as well as a complete hardware and soft- ware implementation using the Z8 Encore! ® MCU. A simple schematic using readily-available compo- nents, along with the full source code in C, is used to implement a stepper driver. This basic hardware and software combination CAN be incorporated into larger control circuits with suitable modifications. Z8 Encore!® Flash MCU Overview Zilog’s Z8 Encore! ® products are based on the new eZ8 CPU and introduce Flash memory to Zilog’s extensive line of 8-bit Microcontrollers Flash memory in-circuit programming capability allows for faster development time and program changes in the field. The high-performance register-to-reg- ister based architecture of the eZ8 core maintains backward compatibility with Zilog’s popular Z8 MCU.
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Schematic for A Unipolar Stepper Motor Drive Using the Z8 Encore! MCU
Schematic for A Unipolar Stepper Motor Drive Using the Z8 Encore!

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