STK672-060-E

No.7441-11/19

Output Pin Functions

Pin No.

Symbol

Function

Pin circuit type

19

MOI

Phase excitation origin monitor

Standard CMOS structure

20, 21

MO1, MO2

Phase excitation state monitor

Standard CMOS structure

Output Signal Functions and Timing

• A, A, B, and B (Motor phase excitation outputs)

1) Function:

- In the 4 phase and 2 phase excitation modes, a 3.75

μs (typical) interval is set up between the A and A and B and

B output signal transition times.

• MO1, MO2, and MOI (Phase excitation state monitors)

1) Pin circuit type: Standard CMOS structure

1) Function:

- Output of the current phase excitation output state.

Phase coordinate

Phase A

Phase B

Phase A

Phase B

MO1

1

0

0

1

MO2

0

1

0

1

MOI outputs a 0 when each phase is at the origin, and outputs a 1 otherwise.

• Current division ratios set by M3, M4, and M5 ········· Values provided for reference purposes.

Mode

Circular

M4 = 1

M4 = 0

M4 = 1

M4 = 1

Setting

M3 = 0

M3 = 1

M5 = 1

M5 = 0

M5 = 0

M5 = 1

Units

Number of steps

15

16

16

15

1/16

2W1-2

21

25

24

20

1/8

2/16

31

34

33

28

3/16

2W1-2

40

44

41

38

2/8

4/16

47

50

49

44

5/16

2W1-2

55

59

56

53

3/8

6/16

63

67

63

60

7/16

2W1-2

71

75

70

67

4/8

8/16

76

81

76

73

9/16

2W1-2

83

87

84

81

5/8

10/16

87

92

88

84

11/16

2W1-2

92

95

95

91

6/8

12/16

96

98

98

93

13/16

Current

division

ratio

4W1-2

2W1-2

100

100

100

100

%

7/8

14/16

[Load conditions]

VCC1 = 24V, VCC2 = 5V, R/L = 3.5/3.8mH

2

1

3