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





Description バージョン サイズ
DB2143 DB2143: EVAL-L9942 2.0 319 KB
Description バージョン サイズ
UM1707 UM1707: EVAL-L9942 3.0 2 MB
UM1947 UM1947: EVAL-L9942 Graphical User Interface 2.0 5 MB


Board Manufacturing Specifications
Description バージョン サイズ
EVAL-L9942_pcb layout 1 MB
Bill of Materials
Description バージョン サイズ
EVAL-L9942 BOM 1.0 43 KB
Schematic Pack
Description バージョン サイズ
EVAL-L9942 schematic 3.0 245 KB


Description バージョン サイズ
Evaluation products license agreement 1.4 128 KB

ツール & ソフトウェア

Evaluation Tool Software
サポート & コミュニティ

サンプル & 購入

製品型番 Marketing Status Unit Price (US$) * 数量 ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
EVAL-L9942 Active 58.8 1 NEC EAR99 - MORE INFO No availability reported, please contact our Sales office

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

品質 & 信頼性

製品型番 Marketing Status RoHS Compliance Grade Material Declaration**
EVAL-L9942 アクティブNot compliant

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.