STMicroelectronics STEVAL-IHM033V1

Overview

STEVAL-IHM033V1 from STMicroelectronics is a motor control evaluation board built around the STM32F100CB 32-bit ARM® Cortex®-M3 microcontroller, featuring insulated USART and non-insulated UUSCI interfaces, DAC output test points, SWD programming/debugging support, and compatibility with ST's PMSM FOC SDK v3.0 for sinusoidal and trapezoidal motor control.

For engineers reviewing the STEVAL-IHM033V1 datasheet, STEVAL-IHM033V1 pinout, STEVAL-IHM033V1 application, or STEVAL-IHM033V1 equivalent, this board serves as a validated control-stage reference for rapid development of three-phase BLDC/PMSM drives interfaced with ST powerboards such as STEVAL-IHM032V1 via MC connector.

Technical Context

The board implements a complete motor control firmware execution environment, with hardware-level support for current sensing (three-phase), temperature feedback, emergency stop, NTC bypass, and dissipative brake/CP boost control. It provides dedicated signal routing for encoder inputs (A/B/Z), PWM synchronization, and bus voltage/current reference DAC outputs.

It integrates dual communication paths: an opto-isolated USART interface for robust host PC or HMI connection, and a non-isolated UART (UUSCI) for debug or auxiliary device linking. The external 8 MHz oscillator ensures precise timing for FOC loop execution and PWM generation.

Key Specifications

Availability

STEVAL-IHM033V1 is available at Aetrix Electronics and suitable for motor control evaluation, embedded PMSM/BLDC drive development, and industrial motion prototyping requiring stable component supply and documented ST reference design integration.

Supply support for STEVAL-IHM033V1 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 specializing in microcontrollers, power management, sensors, and automotive ICs, with broad industrial and consumer design-in support.

This board belongs to ST's STEVAL (ST Evaluation) series - purpose-built reference platforms enabling rapid validation of ST microcontrollers in targeted applications like motor control, power conversion, and industrial automation.

FAQ

Does STEVAL-IHM033V1 include a power stage?

No. STEVAL-IHM033V1 is a control-stage-only board. It requires pairing with a compatible ST demonstration powerboard (e.g., STEVAL-IHM032V1) via the MC connector to form a complete motor drive system. Power MOSFETs, gate drivers, and current shunts are located on the powerboard, not this control board.

Which firmware is supported out-of-the-box?

The board is validated with ST's STM32 PMSM single/dual FOC SDK v3.0. Precompiled binaries and source code for sinusoidal and trapezoidal control modes are provided in the SDK package, along with configuration tools for current/voltage loop tuning and parameter calibration.

Can the DAC outputs be used for analog control signals?

Yes. Two DAC outputs (DAC1 and DAC2) are brought out to test points and support configurable voltage ranges (0–3.3 V). They are used in firmware for current reference generation, torque command scaling, or auxiliary analog monitoring - fully software-configurable via STM32 HAL libraries.

Is the insulated USART interface RS-232 or RS-485 compatible?

The insulated USART interface uses optocouplers for galvanic isolation but does not include line drivers. It operates at TTL logic levels (3.3 V) and requires external level-shifting circuitry (e.g., MAX3232 or SP3485) to interface with RS-232 or RS-485 physical layers.