AT5550

2-Channel Motor Driver for DSC

7F, NO.9, Park Avenue II, Science-Based Industrial Park, Hsinchu 300, Taiwan, R.O.C.

Tel: 886-3-563-0878

Fax: 886-3-563-0879

WWW:

http://www.aimtron.com.tw

8/7/2006

REV:1.2

Email:

service@aimtron.com.tw

5

Input-output logic table

Input

Output

IN1A

IN1B

IN2A

IN2B

OUT1A

OUT1B

OUT2A

OUT2B

Mode

L

L

L

L

Z

Z

Z

Z

Standby

H

L

H

L

L

H

L

H

H

L

H

L

L

H

L

H

H

H

H

H

Keep the previous output state

Input

Output

IN1A

IN1B

IN2A

IN2B

OUT1A

OUT1B

OUT2A

OUT2B

Mode

L

L

L

L

Z

Z

Z

Z

Standby

H

L

L

L

H

L

Z

Z

H

L

H

L

H

L

H

L

L

L

H

L

Z

Z

H

L

L

H

H

L

L

H

H

L

L

H

L

L

L

H

Z

Z

L

H

L

H

L

H

L

H

L

L

L

H

Z

Z

L

H

H

L

L

H

H

L

L

H

1,2 phase

excitation

H

H

H

H

Keep the previous output state