Block Diagram(Stepping Motor(S) × 2-ch Control Mode)
Current Level Set
Current Feedback (×2)
(Mixed Decay Control)
* "X" means the ellipsis of AB / CD of each Ch. (CW/CCW_X, CLK_X, X_MODE1, X_MODE2,
ENABLE_X, and RESET_X)
Note: GND wiring: We recommend that a heat sink be grounded at all points, and the board be grounded at
only one GND pin for single point ground. Take the heat dissipation into consideration when designing
the board. When in controlling the setting pins for each mode by SW, those pins should be pulled up to
power supply like VCC or pulled down to GND not to go into a high-impedance (Hi-Z) state.
Utmost care is necessary in the design of the output line, VM line and GND line since IC may be
destroyed due to short-circuit between outputs, to supply, or to ground.
Especially for those pins that are connected to power supply and get a large current flow (such as VM,
RS, OUT and GND), they should be properly wired; otherwise troubles including destruction may
occur to this IC. If the logic input pins are not wired properly, malfunction that would destroy the IC
may occur due to a large current exceeding the absolute maximum ratings. Care should be taken in the
design of board layouts and implementation of the IC.