UPD168110 查看數據表（PDF） - NEC => Renesas Technology
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UPD168110 Datasheet PDF : 18 Pages
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µPD168110
OPERATION DESCRIPTION
• Setting output current
The peak value of the output current (when current of ch 1 or ch 2 is 100%) is determined by the resistor RFB that
is connected to FB1 and FB2. This IC has an internal reference power supply VREF (500 mV TYP.) for comparing
current, and drives the stepper motor with the current value calculated by RFB and VREF as the peak output
current value.
Peak output current value IMAX (A) ≅ VREF (V) ÷ RFB (Ω) x Output detection ratio
• Pulse output
The motor is driven by inputting a pulse to the CLK pin. The motor advances by one pulse at the rising edge of
the CLK signal. When MODE = “H”, the motor is driven in the 64-microstep driving mode, and the driving current
of each step is determined based on the internal motor excitation position information and revolution direction.
When MODE = “L”, the two-phase excitation mode is selected, and the current direction (100% drive) of ch 1 and
ch 2 are switched each time a pulse has been input.
• Setting motor revolution direction
The revolution direction of the motor is set by CW. In the CW mode (CW = “L”), the current of ch2 is output, 90°
degrees in phase behind the current of ch1. In the CCW mode (CW = “H”), the current of ch2 is output, 90°
degrees in phase ahead of the current of ch1.
CW Pin
L
H
Operation Mode
CW mode (forward revolution)
CCW mode (reverse revolution)
• Setting stop mode (valid only in microstep driving mode)
When STOP = “H”, the motor advances to the position of MOB output = “L”, and the output status is held.
The excitation status is not changed even when a pulse is input to CLK while MOB = “L” when STOP = “H”. The
pulse can be advanced when STOP = “L”.
STOP
L
H
Operation Mode
Normal mode
Stop mode
Caution If STOP = “L” before the stop mode is set (until MOB = “L”), the operation is performed in the
same manner as in the normal mode.
Data Sheet S15840EJ2V0DS
11
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