A4988 DMOS Stepper Motor Driver (StepStick)
Complete microstepping motor driver with built-in translator, adjustable current limiting, over-current and over-temperature protection, and 5 step resolutions down to 1/16-step.
Aliase:A4988, StepStick, RepRap Driver, Pololu Stepper Driver
16-Pin StepStick Module Pinout
16 Pins
Pinout Table16
| Pin | Signal / Name | Type | Alternative Functions |
|---|---|---|---|
| 1 | ~ENABLE | Digital | Output Enable (Active Low — pull LOW to enable FETs) |
| 2 | MS1 | Digital | Microstep Resolution Select 1 (MS1/MS2/MS3: 000=full, 100=1/2, 010=1/4, 110=1/8, 111=1/16) |
| 3 | MS2 | Digital | Microstep Resolution Select 2 |
| 4 | MS3 | Digital | Microstep Resolution Select 3 |
| 5 | ~RESET | Digital | Reset Input (Active Low, connect to SLEEP if unused) |
| 6 | ~SLEEP | Digital | Sleep Mode (Active Low — pull HIGH for normal operation; LOW disables outputs and minimizes power) |
| 7 | STEP | Digital | Step Input (Rising edge executes one microstep) |
| 8 | DIR | Digital | Direction Control (HIGH = forward / CW, LOW = reverse / CCW) |
| 9 | GND | Ground | Digital Ground Reference (0V) |
| 10 | VDD | Power | Logic Supply Voltage (3.0V to 5.5V DC) |
| 11 | 1B | Power | Motor Coil 1 Terminal B |
| 12 | 1A | Power | Motor Coil 1 Terminal A |
| 13 | 2A | Power | Motor Coil 2 Terminal A |
| 14 | 2B | Power | Motor Coil 2 Terminal B |
| 15 | GND | Ground | Motor Ground Reference |
| 16 | VMOT | Power | Motor Supply Voltage (+8V to +35V DC) |