A3979 datasheet(7/15 Pages) ALLEGRO

Part #	A3979

Description	Microstepping DMOS Driver with Translator

PDF	15 Pages

Scroll/Zoom	100%

Manufacturer	ALLEGRO [Allegro MicroSystems]

Direct Link	http://www.allegromicro.com

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7 / 15 page

DMOS Microstepping Driver with Translator

A3979

Allegro MicroSystems, Inc.

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-5000

www.allegromicro.com

Figure 1. Logic Interface Timing Diagram

Table 1. Microstep Resolution Truth Table

MS1

MS2

Microstep Resolution

Excitation Mode

Full Step

2 Phase

Half Step

1-2 Phase

Quarter Step

W1-2 Phase

Sixteenth Step

4W1-2 Phase

Timing Requirements

(TA = +25

°C, VDD = 5 V, Logic Levels are VDD and Ground)

50%

STEP

MS1/MS2/

DIR/RESET

Dwg. WP-042

SLEEP

A. Minimum Command Active Time

Before Step Pulse (Data Set-Up Time) ..... 200 ns

B. Minimum Command Active Time

After Step Pulse (Data Hold Time) ............ 200 ns

C. Minimum STEP Pulse Width ...................... 1.0

μs

D. Minimum STEP Low Time ......................... 1.0

μs

E. Maximum Wake-Up Time ......................... 1.0 ms

A3979 Datasheet(PDF) 7 Page - Allegro MicroSystems