MSE570 data sheet
Page 2 of 5
Issue 002
Motor
Pins 4 a & c, 6 a & c
Motor phase A should be connected between 4 a & c
and 6 a & c.
Pins 8 a & c, 10 a & c
Motor phase B should be connected between 8 a & c
and 10 a & c.
Phase A’
Phase A
Phase B’
Phase B
4 lead motor
max drive current = motor phase current rating
Phase A’
Phase A
Phase B’
Phase B
6 lead motor - both coils
max drive current = motor phase current rating /
√2
Phase A’
Phase A
Phase B’
Phase B
6 lead motor - one coil
max drive current = motor phase current rating
Phase A’
Phase A
Phase B’
Phase B
8 lead motor - coils in parallel
max drive current = motor phase current rating x
√2
Phase A’
Phase A
Phase B’
Phase B
8 lead motor - coils in series.
max drive current = motor phase current rating /
√2
To reverse sense or direction swap the connections to
one phase. E.g. swap phase B with phase B’.
Control inputs
Pin 14 a
Direction control input. Pulling this input low will reverse
the direction of rotation of the motor
Pin 14 c
Step pulse input. The motor will increment one step on a
high to low transition on this input. The pulse should be
low for 10
µS minimum. Maximum frequency 20KHz.
Pin 16 a
Full/half step control input. If this input is high (or
unconnected), full step drive will be generated giving
200 steps per revolution of a hybrid stepper motor. If it is
pulled low, then half step drive will be generated giving
400 steps per revolution. This input would not normally
be changed during use as the unit may enter a wave
drive mode (full step with only one phase on).
The use of half step reduces problems with resonance.
Pin 16 c
Reset input. Pulling this input low will set the internal
logic to give the home phase output and therefore the
home output will be on. This may also be used to reset
an error condition such as overload or overtemperature.
Pin 18 a
Output disable input. Pulling this input low will disable
the motor output current. There will then be no motor
torque and it may be rotated by hand.
These control inputs are CMOS schmitt trigger inputs
operating at +12V with 10K
Ω pull-up resistors and diode
isolation. The control options are as follows:
0V common
Input
CMOS output operating at +12V
0V common
Input
Open collector TTL output (e.g. 7406, 7407)
0V common
Input
Opto isolator
0V common
Input
Switch
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