SKT672-040-E Datasheet, PDF (11/19 Pages) ON Semiconductor – Stepping Motor Driver

Output Pin Functions
Pin No.
19
20, 21
Symbol
MOI
MO1, MO2
STK672-040-E
Function
Phase excitation origin monitor
Phase excitation state monitor
Pin circuit type
Standard CMOS structure
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 3.75μs (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
1
2
3
Setting
M3 = 0
M3 = 1
M4 = 1
M5 = 1
M4 = 0
M5 = 0
M4 = 1
M5 = 0
M4 = 1
M5 = 1
Units
Number of steps
14
15
15
13
1/16
2W1-2
20
25
23
19
1/8
2/16
31
34
33
28
3/16
2W1-2
40
44
42
39
2/8
4/16
48
51
49
45
5/16
2W1-2
55
62
57
54
3/8
6/16
Current
65
69
65
62
7/16
division
4W1-2
%
ratio
2W1-2
71
77
71
69
4/8
8/16
77
82
77
74
9/16
2W1-2
83
88
85
82
5/8
10/16
88
92
89
85
11/16
2W1-2
92
95
95
92
6/8
12/16
97
98
98
94
13/16
2W1-2
100
100
100
100
7/8
14/16
[Load conditions]
VCC1 = 24V, VCC2 = 5V, R/L = 3.5/3.8mH
No. 5227-11/19