A3982
DMOS Stepper Motor Driver with Translator
t
t
B
A
STEP
t
t
D
C
MS1,
RESET, or DIR
Time Duration
Symbol
Typ.
1
Unit
μs
STEP minimum, HIGH pulse width
STEP minimum, LOW pulse width
Setup time, input change to STEP
Hold time, input change to STEP
tA
tB
tC
tD
1
μs
200
200
ns
ns
Figure 1. Logic Interface Timing Diagram
Table 1. Stepping Resolution Truth Table
MS1
L
Step Resolution
Full Step
Half Step
Excitation Mode
2 Phase
H
1-2 Phase
Allegro MicroSystems, Inc.
5
115 Northeast Cutoff, Box 15036
26184.28B
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com