Datasheet

1300 Henley Court

Pullman, WA 99163

509.334.6306

www.digilentinc.com

PmodSTEP™ Reference Manual

Revised March 30, 2015

This manual applies to the PmodSTEP rev. A

DOC#: 502-276

Other product and company names mentioned may be trademarks of their respective owners.

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Overview

The Digilent PmodSTEP can drive either a 4-pin or 6-pin stepper motor.

1 Functional Description

The PmodSTEP utilizes ST's four channel driver, a L293DD, to drive stepper motors at higher currents than a system

board can typically provide from their logic outputs. External test point headers and LEDs are provided for easy

testing and observation of the propagation of signals.

2 Interfacing with the Pmod

The PmodSTEP communicates with the host board via the GPIO protocol.

This Pmod offers headers for both 4-pin and 6-pin stepper motors. Stepper motors work by alternately energizing

the coils to different polarities inducing the stepper motor to rotate.

4-pin stepper motors only work in the bipolar configuration, requiring that the two inputs on each electromagnetic

coil are brought to the correct logic level voltages to induce current flow in the correct direction. The 6-pin stepper

motor header on this Pmod can be oriented for either bipolar or unipolar configuration. The two extra pins on this

The PmodSTEP.

 Utilizes a ST L293DD channel driver

 Capable of running both a 4 and 6 pin

stepper motor simultaneously

 Multiple LEDs to indicate signal propagation

Features include:

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300 Henley Court Pullman, WA 99163 509.334.6306 www.digilentinc.com PmodSTEP™ Reference Manual Revised March 30, 2015 This manual applies to the PmodSTEP rev. A Overview The Digilent PmodSTEP can drive either a 4-pin or 6-pin stepper motor. Features include:    Utilizes a ST L293DD channel driver Capable of running both a 4 and 6 pin stepper motor simultaneously Multiple LEDs to indicate signal propagation The PmodSTEP.
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PmodSTEP™ Reference Manual header provide two positive power pins as a source of current for when an input on one end of a coil is driven to a logic low voltage level.