EVAL-L9942:Evaluation board for L9942XP microstepping fully integrated motor driver

The EVAL-L9942 is the Evaluation Board designed to provide the user a platform to evaluate the device L9942.

The L9942 is a motor driver for bipolar stepper motors with micro-stepping and programmable current profile look-up-table to allow a flexible adaptation of the motor characteristics and intended operating conditions.

Different current profiles can be chosen depending on target criteria: audible noise, vibrations, rotation speed or torque.

The decay mode used in PWM-current control circuit can be programmed to have slow, fast, mixed and auto-decay.

The programmable stall detection is useful to avoid running the motor too long time in stall position minimizing the noise.

The EVAL-L9942 board provides all the inputs and outputs capabilities necessary to drive correctly a bipolar stepper motor and also to monitoring diagnostic functionalities.

The board can be connected to the discovery boards developed for the SPC56 microcontroller.

Key Features

  • Input signal connector compatible with the SPC56 Discovery boards. Possibility to connect the board to further microcontroller discovery or control boards by a simple adaptor.
  • Two output terminal blocks.
  • Wide supply voltage range (VBatt ): 7 V ÷ 20 V.
  • 2 LEDs for monitoring VBatt and EN signal.
  • Device controlled and programmed via SPI.
  • L9942 diagnostic functions via SPI.
  • Test points to monitoring both input signals (SPI, PWM, EN, StepClock) and the four outputs (out power stage).
  • No heat-sink is required
Product Specifications
DescriptionVersionSize
DB2143: EVAL-L99422.0319 KB
User Manuals
DescriptionVersionSize
UM1707: EVAL-L99423.02 MB
UM1947: EVAL-L9942 Graphical User Interface2.05 MB
Board Manufacturing Specifications
DescriptionVersionSize
EVAL-L9942_pcb layout1 MB
Bill of Materials
DescriptionVersionSize
EVAL-L9942 BOM1.043 KB
Schematic Packs
DescriptionVersionSize
EVAL-L9942 schematic2.0217 KB
License Agreement
DescriptionVersionSize
Evaluation products license agreement1.0125 KB
Evaluation Tool Software
Part NumberManufacturerDescription
STSW-L9942STEVAL-L9942 Graphical User Interface
Sample & Buy
Part NumberUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
EVAL-L994242.881NECEAR99-
Quality & Reliability
Part NumberRoHS Compliance GradeMaterial Declaration**
EVAL-L9942Not compliant
EVAL-L9942 EVAL-L9942
EVAL-L9942 EVAL-L9942
EVAL-L9942 Graphical User Interface EVAL-L9942
EVAL-L9942 Graphical User Interface EVAL-L9942
EVAL-L9942 Graphical User Interface EVAL-L9942
EVAL-L9942 Graphical User Interface EVAL-L9942
ST-LINK/V2 in-circuit debugger/programmer for STM8 and STM32 ST-LINK-V2