A4979 데이터 시트보기 (PDF) - Allegro MicroSystems

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A4979

Microstepping Programmable Stepper Motor Driver With Stall Detect and Short Circuit Protection

Allegro MicroSystems 

A4979

Microstepping Programmable Stepper Motor Driver

With Stall Detect and Short Circuit Protection

STEP

No rise when

D15=1 and D14=0

L

M

STRn

C

SCK

J

A

B

K

D

E

SDI

X

F

SDO Z

D15

D15'

X

I

D14

D14'

X

D0

X

G

D0'

Z

H

Figure 1. Serial Interface Timing Diagram

Key

Characteristic

A Clock High Time

B Clock Low Time

C Strobe Lead Time

D Strobe Lag Time

E Strobe High Time

F Data Out Enable Time

G Data Out Disable Time

Key

Characteristic

H Data Out Valid Time from Clock Falling

I Data Out Hold Time from Clock Falling

J Data In Set-Up Time to Clock Rising

K Data In Hold Time From Clock Rising

L STEP Rising to STRn Rising Setup Time

M STEP Rising from STRn Rising Hold Time

X “Don’t care”

Z High-impedance (tristate)

tSTPH

tSTPL

STEP

DIR, MS0, MS1

tSU

tH

RESETn

tEN

ENABLE*

* ENABLE(Pin) OR RUN[EN] bit

Figure 2. Control Input Interface Timing Diagram

Allegro MicroSystems, LLC

8

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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