LB8649FN

No.7893-4/9

Truth Table

1. Stepping motor constant voltage control for AF

Input

Output

IN1

IN2

IN3

IN4

INHD

OUT1

OUT2

OUT3

OUT4

Vref

Mode

L

L

L

L

L

-

-

-

-

-

Stand-by

H

L

L

L

H

L

-

-

H

L

H

L

H

L

H

L

L

L

H

L

-

-

H

L

L

H

H

L

L

H

H

L

L

H

L

L

L

H

-

-

L

H

L

H

L

H

L

H

L

L

L

H

-

-

L

H

H

L

L

H

H

L

L

H

1-2 phase excitation

H

H

*

*

-

-

*

*

H

H

L

-

-

1.0V

Output OFF

L

1.0V

*

*

*

*

H

0.67V

• ( - ) is output OFF.

• When setting output to “H”, the output voltage is 5.1 times the VC1.

2. Stepping motor constant voltage control for ZOOM or DC motor drive

Input

Output

IN5

IN6

IN7

IN8

INHD

OUT5

OUT6

OUT7

OUT8

Vref

Mode

L

L

L

L

L

-

-

-

-

-

Stand-by

H

L

L

L

H

L

-

-

H

L

H

L

H

L

H

L

L

L

H

L

-

-

H

L

L

H

H

L

L

H

H

L

L

H

L

L

L

H

-

-

L

H

L

H

L

H

L

H

L

L

L

H

-

-

L

H

H

L

L

H

H

L

L

H

1-2 phase excitation

H

H

*

*

H

H

*

*

H

H

L

H

H

1.0V

Brake

L

1.0V

*

*

*

*

H

0.67V

• ( - ) is output OFF, and ( * ) is “Don’t care”.

• When setting output to “H”, the output voltage is 5.1 times the VC2.