EVAL-L9942 STMicroelectronics

EVAL-L9942 EVAL-L9942 Data brief Description 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 Features long time in stall position minimizing the noise. Input signal connector compatible with the The EVAL-L9942 board provides all the inputs SPC56 Discovery boards. Possibility to and outputs capabilities necessary to drive connect the board to further microcontroller correctly a bipolar stepper motor and also to discovery or control boards by a simple monitoring diagnostic functionalities. The board adaptor. can be connected to the discovery boards Two output terminal blocks. developed for the SPC56 microcontroller. Wide supply voltage range (V ): 7 V 20 Batt Table 1: Device summary V. Order code Reference 2 LEDs for monitoring V and EN signal. Batt Device controlled and programmed via SPI. EVAL-L9942 EVAL-L9942 evaluation board 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 March 2015 DocID025658 Rev 2 1/5 www.st.com For further information contact your local STMicroelectronics sales office Contents EVAL-L9942 Contents 1 System requirements, HW and SW resources .............................. 3 1.1 System requirements ........................................................................ 3 2 Revision history .............................................................................. 4 2/5 DocID025658 Rev 2