DRV8834 Datasheet, PDF (19/30 Pages) Texas Instruments – DUAL BRIDGE STEPPER OR DC MOTOR DRIVER

DRV8834
www.ti.com
SLVSB19A – FEBRUARY 2012 – REVISED MARCH 2012
Indexer Mode Driving a Stepper Motor
In indexer mode, only a rising edge on the STEP pin is needed to move the motor to the next step. The DIR pin
sets which direction the motor rotates, by reversing the step sequence. The internal indexer can operate in full-
step, half-step, and smaller microsteps up to 1/32-step, depending on the state of the M0 and M1 pins. The M0
and M1 pins can also be connected directly to ground or to VINT to program the step modes, if desired. If the
sleep function is not needed, nSLEEP can be connected to VM with an approximate 47-kΩ resistor. Step
sequences for full and half step are shown below.
1 Step
STEP
DIR
A Current
B Current
Figure 8. Indexer Mode Driving a Stepper Motor
1 Step
STEP
DIR
A Current
B Current
Figure 9. Full Step Sequence
(2-Phase)
Figure 10. Half Step Sequence
(1-2 Phase)
Copyright © 2012, Texas Instruments Incorporated
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