X-NUCLEO-IHM01A1 Stepper motor driver expansion board based on L6474 for STM32 Nucleo Data brief Description The X-NUCLEO-IHM01A1 is a stepper motor driver expansion board based on the L6474. It provides an affordable and easy-to-use solution for driving a stepper motor in your STM32 Nucleo project. The advanced current control of the L6474 and a complete set of protection features offer high levels of both performance and robustness. The X-NUCLEO-IHM01A1 is compatible with the Arduino UNO R3 connector, and supports the addition of other boards which can be stacked to drive up to three stepper motors with a single STM32 Nucleo board. Features • Voltage range from 8 V to 45 V • Phase current up to 3 Ar.m.s. • Power OK and fault LEDs • Advanced current control • Fully protected power stage • Up to 1/16 microstepping resolution • Compatible with Arduino UNO R3 connector • Compatible with STM32 Nucleo boards • Suitable for multi-motor solutions • RoHS compliant March 2015 DocID026559 Rev 3 For further information contact your local STMicroelectronics sales office. 1/4 www.st.com VDD D2 RED R21 330R R13 10K VDD A0 A1 A2 A3 A4 A5 DIR_1 CN9 CON-1x8 1x8 - pitch 2.54 0R R1 DIR NP R2 DIR NP R3 100NF C11 CON-1x6 1x6 - pitch 2.54 1 2 3 4 5 6 CN8 CON-1x8 1x8 - pitch 2.54 DIR_2 CON-2x19 IOREF DIR_3 0R R4 NP R5 NP R6 PWM STCK C4 NP R24 R25 0R R15 NP 3.3NF TP2 NP R23 0R CN10 CON-2x19 NP SDI TP1 NP R9 SPIMotor NP R8 SDI R14 10K VDD CN5 CON-1x10 1x10 - pitch 2.54 0R R7 SPI_NCK SPI_CS 1 MOSI 3.3V 5V GND GND VIN VDD 1 1 2 3 4 5 6 7 8 2->3 CN6 1->2 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 SDO NP R11 R22 NP CN3 CON-1x2 1x2 - pitch 2.54 NP R10 SDO C5 NP SPI_MISO + R12 0R 8 7 11 10 30 26 27 25 10UF + C7 32 STBY_RESET6 31 FLAG 29 ADCIN 100NF C6 VDD C1 47UF 100NF D7 GREEN C2 330R R20 24 2 CS CK SDI SDO STCK STBY_RES FLAG BUSY_SYNC ADCIN SW OSCOUT OSCIN VDD C3 D1 BAR43 3 13 1 C8 10NF 220NF L6474PD U1 CP 14 VBOOT 9 VREG DGND 28 AGND 12 EPAD 37 VS 4 5 33 34 15 16 22 23 OUT2B OUT2B OUT1B OUT1B OUT2A OUT2A OUT1A OUT1A VSA VSA VSA VSA VSB VSB VSB VSB PGND PGND 1 19 CN7 2 1 1 3 5 7 9 11 13 15 17 19 21 23 25 27 29 31 33 35 37 PWM_1 1 2 3 4 5 6 7 8 UART RX UART TX FLAG PWM2 DIR2 DIR3 PWM3 DIR1 PWM_3 1 2 3 4 5 6 7 8 9 10 RESET EASY PWM1 CS MOSI MISO SCK GND AREF SDA SCL PWM_2 37 35 33 31 29 27 25 23 21 19 17 15 13 11 9 7 5 3 1 MIRE3 OPTICAL_TARGET MIRE2 OPTICAL_TARGET MIRE1 OPTICAL_TARGET 20 21 18 17 35 36 2 3 VS D4 100NF C10 D5 D6 100UF 63V + C12 SDI SDO R4 R7 R10 R8 R11 R9 R12 R1 R4 R7 R12 SINGLE MOTOR DIR PWM R1 R5 R19 2.2K R2 R18 2.2K R3 R17 2.2K R6 R16 2.2K YELLOW YELLOW YELLOW YELLOW D3 100NF C9 N°3 DocID026559 Rev 3 N°2 2/4 N°1 CN1 GND Vin A- A+ B- B+ MKDS1/6-3.81 3.81 6 5 4 3 2 1 1 38 36 34 32 30 28 26 24 22 20 18 16 14 12 10 8 6 4 2 Schematic diagram X-NUCLEO-IHM01A1 Schematic diagram Figure 1. X-NUCLEO-IHM01A1 circuit schematic X-NUCLEO-IHM01A1 2 Revision history Revision history Table 1. Document revision history Date Revision Changes 18-Jun-2014 1 Initial release. 10-Sep-2014 2 Updated board photo in cover page. 30-Mar-2015 3 Updated title in cover page. DocID026559 Rev 3 3/4 4 X-NUCLEO-IHM01A1 IMPORTANT NOTICE – PLEASE READ CAREFULLY STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, enhancements, modifications, and improvements to ST products and/or to this document at any time without notice. Purchasers should obtain the latest relevant information on ST products before placing orders. ST products are sold pursuant to ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’ products. No license, express or implied, to any intellectual property right is granted by ST herein. Resale of ST products with provisions different from the information set forth herein shall void any warranty granted by ST for such product. ST and the ST logo are trademarks of ST. All other product or service names are the property of their respective owners. Information in this document supersedes and replaces information previously supplied in any prior versions of this document. © 2015 STMicroelectronics – All rights reserved 4/4 DocID026559 Rev 3