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STK672-610 Datenblatt(PDF) 11 Page - Sanyo Semicon Device

Teilenummer STK672-610
Bauteilbeschribung  Thick-Film Hybrid IC 2-phase Stepping Motor Driver
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Hersteller  SANYO [Sanyo Semicon Device]
Direct Link  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

STK672-610 Datenblatt(HTML) 11 Page - Sanyo Semicon Device

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STK672-610
No. A0756-11/19
Usage Notes
1. STK672-600 and STK672-610 input signal functions and timing
(All inputs have no internal pull-up resistor and are TTL level Schmitt trigger inputs.)
[RESETB and CLOCK (Input signal timing when power is first applied)]
As shown in the timing chart, a RESETB signal input is required by the driver to operate with the timing in which the
F1 gate is turned on first. The RESETB signal timing must be set up to have a width of at least 10
μs, as shown below.
The capacitor CO2, and the resistors RO3 and RO4 in the application circuit form simple reset circuit that uses the
RC time constant rising time. However, when designing the RESETB input based on VIH levels, the application
must have the timing shown in figure.
RESETB and CLOCK Signals Input Timing
[CLOCK (Phase switching clock)]
• Input frequency: DC to 50kHz
• Minimum pulse width: 10μs
• MODE2=1(High) Signals are read on the rising edge.
• MODE2=0(Low) Signals are read on the rising and falling edges.
[CWB (Motor direction setting)]
The direction of rotation is switched by setting CWB to 1 (high) or 0 (low). See the timing charts for details on the
operation of the outputs.
Note: The state of the CWB input must not be changed during the 6.25
μs period before and after the rising edge of
the CLOCK input.
[ENABLE (Forcible on/off control of the A, AB, B, and BB outputs, and hybrid IC internal operation)]
ENABLE=1: Normal operation
ENABLE=0: Outputs A, AB, B, and BB forced to the off state.
If, during the state where CLOCK signal input is provided, the ENABLE pin is set to 0 and then is later
restored to the 1 state, the IC will resume operation with the excitation timing continued from before
the point ENABLE was set to 0.
If sudden stop is applied to the CLOCK signal used for motor rotation, the motor axis may advance beyond the
theoretical position due to inertia. To stop at the theoretical position, the SLOW DOWN setting for gradually slowing
the CLOCK cycle is required.
Enable must be initially set high for input as shown in the timing chart.
[MODE1 and MODE2 (Excitation mode selection)]
MODE1=0: 2-phase excitation
MODE2=1: Rising edge of CLOCK
MODE1=1: 1-2 phase excitation
MODE2=0: Rising and falling edges of CLOCK
See the timing charts for details on output operation in these modes.
Note: The state of the MODE input must not be changed during the 5
μs period before and after the rising edge of the
CLOCK input.
Rise of the 5V supply
voltage
RESETB signal input
CLOCK signal
At least
10
μs
At least
5
μs


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