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A4988 Datasheet(PDF) 6 Page - Allegro MicroSystems |
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A4988 Datasheet(HTML) 6 Page - Allegro MicroSystems |
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6 / 19 page  DMOS Microstepping Driver with Translator and Overcurrent Protection A4988 6 Allegro MicroSystems, Inc. 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com 4988-DS Figure 1. Logic Interface Timing Diagram STEP t A t D t C MS1, MS2, MS3, RESET, or DIR t B Table 1. Microstepping Resolution Truth Table Time Duration Symbol Typ. Unit STEP minimum, HIGH pulse width tA 1 μs STEP minimum, LOW pulse width tB 1 μs Setup time, input change to STEP tC 200 ns Hold time, input change to STEP tD 200 ns MS1 MS2 MS3 Microstep Resolution Excitation Mode L L L Full Step 2 Phase H L L Half Step 1-2 Phase L H L Quarter Step W1-2 Phase H H L Eighth Step 2W1-2 Phase H H H Sixteenth Step 4W1-2 Phase |
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