stk672-640b-e Sanyo Semiconductor Corporation, stk672-640b-e Datasheet - Page 12

• Manufacturer Part Number: stk672-640b-e
• Description: 2-phase Stepping Motor Driver
• Manufacturer: Sanyo Semiconductor Corporation

[MODE1 and MODE2 (Excitation mode selection)]
[Configuration of Each Input Pin]
<Configuration of the MODE1, MODE2, CLOCK,
<Configuration of the Vref input pin>
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 5μs period before and after the rising edge of the
All input pins of this driver support schmitt input. Typ specifications at Tc = 25°C are given below. Hysteresis voltage
is 0.3V (VIHa-VILa).
Input voltage specifications are as follows.
V IH =2.5V min
V IL =0.8V max
CWB, ENABLE, and RESETB input pins>
Input pin
CLOCK input.
The CLOCK input must not be changed during the period from when the signal changes from high to low or low
to high in MODE1 or MODE2, till when the signal changes from high to low or low to high in CWB.
Vref/4.9
Input voltage
V SS
Amplifier
When rising
1.8V typ
−
+
100kΩ
10kΩ
Input pin
Pin 19
VIHa
STK672-640B-E
V SS
5V
Output pin
Pin 16
Output pin
Pin 8
<Configuration of the FAULT1 output pin>
(The buffer has an open drain configuration.)
<Configuration of the FAULT2 pin>
50kΩ
50kΩ
50kΩ
5V
Overheating
Overcurrent
Motor terminal open
V SS
5V
VILa
When falling
Motor terminal open
Overcurrent
Overheating
1.5V typ
No. A1739-12/24