STK672-400 Datasheet, PDF (10/19 Pages) Sanyo Semicon Device – Thick-Film Hybrid IC 2-phase Stepping Motor Driver

STK672-400
[MODE1, MODE2, and MODE3 (Excitation mode and timing mode selection)]
(1) Pin circuit type: TTL level Schmitt trigger input
(2) Excitation mode selection (See the application circuit example page for details on excitation mode selection.)
(3) Valid mode setting timing: Do not change the mode within the ±7μs period around any rising or falling edge on the
CLK input signal.
CLK input
System clock
Mode setting
Mode switching clock
IC internal setting state
Phase excitation clock
Mode switching timing
Phase excitation counter up/down
Mode Setting Acquisition Timing
[RESET (Whole system reset)]
(1) Pin circuit type: TTL level Schmitt trigger input
(2) Function: The reset signal to this hybrid IC's internal sequencer can be selected to be either the hybrid IC internal
power-on reset function or an external signal. To operate the hybrid IC internal sequencer from the
hybrid IC internal power-on reset signal, connect the hybrid IC's pin 14 to VDD. The hybrid IC internal
reset signal is generated with a timing such that it is output to internal circuits when VDD is in the range
2.9 to 3.9V.
Alternatively, if an external signal is used as the reset signal, it must have the timing relative to the rise of
the VDD voltage shown in the figure below. Note that the reset pulse must have a pulse width of at least
10μs.
• External reset and power supply application sequence
VDD: 5V power supply (hybrid IC pin 9)
4.5V
RESET: Hybrid IC pin 4
At least 10μs
No.A0751-10/19