STMicroelectronics X-NUCLEO-IHM09M2

Overview

X-NUCLEO-IHM09M2 from STMicroelectronics is a motor control connector expansion board for STM32 Nucleo development platforms, enabling rapid evaluation of three-phase motor control using external ST power boards. It features a 34-pin ST motor control connector, ST morpho headers for MCU interfacing, DAC/debug access, fault-indicating LED, and onboard potentiometer - deployed in industrial BLDC/PMSM drive prototyping.

For engineers reviewing the X-NUCLEO-IHM09M2 datasheet, X-NUCLEO-IHM09M2 pinout, X-NUCLEO-IHM09M2 application, or X-NUCLEO-IHM09M2 equivalent, key considerations include ST morpho/Arduino header compatibility, six-step & FOC firmware library support, DAC-peripheral accessibility, and 34-pin motor control interface mapping to ST power stages.

Technical Context

The board bridges STM32 Nucleo MCUs to ST's three-phase gate driver/power boards via standardized 34-pin motor control and ST morpho connectors. It routes PWM, Hall/encoder, current sense, temperature, and brake signals between MCU and power stage while providing test points and debug access to GPIOs, DAC outputs, and speed/temp sensing pins.

It supports both six-step commutation and field-oriented control (FOC) firmware libraries from ST, with dedicated signal paths for phase A/B/C (PA0/PC0/PC1), encoder inputs (PB3/PB10), NTC thermistor (PC10), and dissipative brake/OCP disable (PA11). No on-board power conversion or motor driving circuitry is present.

Key Specifications

Availability

X-NUCLEO-IHM09M2 is available at Aetrix Electronics and suitable for industrial motor drive prototyping, embedded BLDC/PMSM control validation, and educational STM32-based motion control labs requiring stable component supply and ST ecosystem interoperability.

Supply support for X-NUCLEO-IHM09M2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and development tools for industrial, automotive, and consumer applications.

The X-NUCLEO product line delivers plug-and-play expansion boards that extend STM32 Nucleo functionality - specifically engineered to accelerate evaluation and development of motor control, sensing, connectivity, and power management subsystems.

FAQ

Does X-NUCLEO-IHM09M2 include a motor driver or power stage?

No. It is a passive interface board only - it provides signal routing, test points, and connectors between an STM32 Nucleo MCU and external ST motor control power boards (e.g., STEVAL-IPM355, EVALST720). No gate drivers, MOSFETs, or power components are onboard.

Which STM32 Nucleo boards are compatible with X-NUCLEO-IHM09M2?

It supports all STM32 Nucleo-64 and Nucleo-144 boards with standard ST morpho headers, including NUCLEO-F302R8, NUCLEO-G431RB, NUCLEO-H743ZI2, and NUCLEO-L476RG - verified via pin-mapped morpho and Arduino connector alignment per DB4728 schematic.

Can X-NUCLEO-IHM09M2 be used for sensored and sensorless motor control?

Yes. It provides dedicated signal paths for Hall-effect sensors (PB3, PB10) and encoder A/B/Z (PA15, PB3, PB10), plus analog inputs for current sensing and NTC thermistors (PC2, PC10), supporting both sensored FOC and six-step, as well as sensorless variants using back-EMF or observer techniques.

Is the potentiometer on X-NUCLEO-IHM09M2 connected to an ADC input?

Yes. The onboard trimmer potentiometer connects to PA0 (labeled "PhA" but repurposed as analog input in firmware examples) and is routed to the MCU's ADC1_IN0 channel - used in ST's reference firmware for speed reference or gain adjustment during motor tuning.