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Application Report
SLVA416–September 2010
High Resolution Microstepping Driver
With the DRV88xx Series
.....................................................................................................................................................
ABSTRACT
This document is provided as a supplement to the DRV8812/13 and DRV8828/29 datasheets. It details
the hardware implementation of the DRV8812/13/28/29 and an MSP430F1612 microcontroller in a
combination that allows the dual DC motor driver to drive a bipolar stepper motor in microstepping
configuration with increased degrees of microstepping.
Contents
1 The Full Step ................................................................................................................ 3
2 The Micro Step .............................................................................................................. 3
1 Microstepping Indexer ...................................................................................................... 5
2 Microcontroller Side Control Signals ..................................................................................... 7
3 Microstepping Engine Algorithm .......................................................................................... 7
List of Figures
1 Full Step...................................................................................................................... 3
2 Micro Step.................................................................................................................... 4
3 Embedded Waveform Into Winding Current............................................................................. 4
4 Application Block Diagram................................................................................................. 5
5 Microstepping Indexer...................................................................................................... 6
6 Microstepping Engine Algorithm .......................................................................................... 7
7 Squared Sine Wave With 256 Degrees of Microstepping ............................................................. 8
8 Trapezoid Waveshape With 256 Degrees of Microstepping .......................................................... 8
9 Triangular Waveshape With 4 Degrees of Microstepping............................................................. 9
10 Top Layer................................................................................................................... 14
11 Bottom Layer............................................................................................................... 15
List of Tables
1 Microstepping Operation................................................................................................... 6
1
SLVA416–September 2010 High Resolution Microstepping Driver With the DRV88xx Series
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