1

2

3

4

5

6

7

8

0101

1001

0001

1000

1010

0010

0110

0100

HOME

1

2

3

4

5

6

7

8

1000

0010

0100

0001

STEP

1

3

5

7

1

3

5

7

1

3

5

7

A

B

C

D

INH1

INH2

0

0

1

2

3

4

5

6

7

8

1010

0110

1001

0101

HOME

FIGURE 4A. HALF-STEP MODE

FIGURE 4B. NORMAL DRIVE MODE (TWO-PHASE-ON)

FIGURE 4C. WAVE DRIVE MODE (ONE-PHASE-ON)

STEP

1

2

3

4

5

6

7

8

1

2

3

4

5

A

B

C

D

INH1

INH2

STEP

2

4

6

8

2

4

6

8

2

4

6

8

A

B

C

D

INH1

INH2

FIGURE 4. MOTOR DRIVING SEQUENCES

The

LS8397 generates phase sequences for half-step mode, normal drive mode and wave drive mode. Advancing occurs on the positive

edge of the STEP input signal. HOME is defined as PHA, PHB, PHC, PHD being 0101, respectively. The State Diagrams showing the

phase output polarities for all states are shown above for clockwise rotation. For counter clockwise rotation, the sequences are reversed.

RESET restores the phases to 0101 and State 1.

8397-111308-5