STK672-612B-E Datasheet, PDF (6/26 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 2-phase Stepping Motor Driver

Input Pin Functions
Pin Name
CLOCK
MODE1
Pin No.
12
10
STK672-612B-E
Function
Reference clock for motor phase current switching
Excitation mode selection
MODE2
17
CWB
13
Motor direction switching
RESETB
ENABLE
14
System reset
Initial state of A and BB phase excitation in the timing
charts is set by switching from low to high.
15
The A, AB, B, and BB outputs are turned off, and after
operation is restored by returning the ENABLE pin to the
high level, operation continues with the same excitation
timing as before the low-level input.
Input Conditions When Operating
Operates on the rising edge of the signal (MODE2=H)
Low: 2-phase excitation
High: 1-2 phase excitation
High: Rising edge
Low: Rising and falling edge
Low: CW (forward)
High: CCW (reverse)
A reset is applied by a low level
The A, AB, B, and BB outputs are turned off by a low-
level input.
Output Pin Functions
Pin Name
Pin No.
Function
FAULT1
FAULT2
16
Monitor pin used when opened motor pin, over-current
detection, or overheat detection function is activated.
8
The result of activation of protection circuit detection is
output.
VrefOP
7
Monitor pin of reference voltage used when opened motor
pin detection.
Note: See the timing chart for the concrete details on circuit operation.
Input Conditions When Operating
Low level is output when detected.
3 levels output voltage
Normal DC voltage output (typ98mV)
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