µPD16808

3

FUNCTION TABLE

• With 1- to 2-phase excitation selected (SEL = High)

Excitation Direction

——

LLLL

S

S

LLL

H

S

R

L

H

L

S

F

——

L

L

H

H

S

S

H

L

L

R

S

<3>

L

H

L

H

R

R

<2>

L

H

H

L

R

F

L

HHHR

S

H

LLL

F

S

<4>

H

L

L

H

F

R

<1>

HL

HL

F

F

L

H

H

F

S

——

H

H

L

L

S

S

H

L

H

S

R

HHH

L

S

F

——

HHHH

S

S

• With 2-phase excitation selected (SEL = Low)

Excitation Direction

<1>

H

H

×

HF

F

<2>

L

H

×

HR

F

<3>

L

L

×

HRR

<4>

H

L

×

HF

R

–

×××

L

Stop

F: Forward

R: Reverse

S: Stop

×: Don’t care

For the excitation waveform timing chart, refer to APPLICATION CIRCUIT EXAMPLE.

<4>

<1>

<2>

<3>

FORWARD

OFF

ON

ON

OFF

AB

REVERSE

OFF

ON

ON

OFF

AB

STOP

OFF

OFF

OFF

OFF

AB