STMicroelectronics STM32H745XIH6

Overview

STM32H745XIH6 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (up to 480 MHz) and Cortex®-M4 (up to 240 MHz) microcontroller with 2 MB flash, 1 MB RAM, integrated SMPS regulator, and 46 communication/analog peripherals. It supports real-time deterministic control in industrial PLCs, motor drives, and embedded vision systems requiring concurrent high-performance computation and low-latency peripheral handling.

For engineers reviewing the STM32H745XIH6 datasheet, STM32H745XIH6 pinout, STM32H745XIH6 application, or STM32H745XIH6 equivalent, key selection considerations include dual-core asymmetric execution, voltage scaling across six power ranges, TCM RAM partitioning for time-critical routines, and hardware JPEG/DFSDM support for edge AI preprocessing.

Technical Context

The device implements three independent power domains (D1/D2/D3) enabling selective clock gating and domain shutdown. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges, supporting concurrent high-bandwidth data movement between cores, DMA controllers, and peripherals.

Dual-core operation is coordinated via shared memory with hardware semaphores and interrupt forwarding; the M7 core handles compute-intensive tasks (e.g., FFT, motor FOC), while the M4 manages real-time I/O (CAN FD, SDMMC, USB OTG) and safety monitoring-both with MPU, FPU, and cache coherency maintained through L1 instruction/data caches (16 KB each on M7).

Key Specifications

Pinout & Package

STM32H745XIH6 is housed in a 240-ball TFBGA package with 25 additional balls for power/ground distribution (VCAP, VSS, VDD, VBAT). The package supports fine-pitch PCB routing and thermal dissipation suitable for high-density industrial modules.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core Arm microcontroller applications.

Compared with STM32H753VIT6, the STM32H745XIH6 delivers true hardware-isolated dual-core determinism for safety-critical I/O; versus i.MX RT1176DVMAA, it provides integrated SMPS and lower system-level power design complexity at the expense of peak clock frequency.

Availability

STM32H745XIH6 is available at Aetrix Electronics and suitable for industrial motor drives, edge vision gateways, programmable logic controllers, and medical imaging nodes requiring stable component supply across long product lifecycles.

Supply support for STM32H745XIH6 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, and analog/mixed-signal ICs for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, security, and heterogeneous processing-designed specifically for industrial automation, advanced motor control, and AI-at-the-edge systems.

FAQ

What is the maximum operating frequency of each core in the STM32H745XIH6?

The Cortex-M7 core operates at up to 480 MHz with double-precision FPU and 16 KB instruction/data caches, delivering 1027 DMIPS. The Cortex-M4 core runs at up to 240 MHz with single-precision FPU and ART Accelerator, achieving 300 DMIPS. Both cores maintain independent clock domains and can operate simultaneously without frequency throttling.

Does the STM32H745XIH6 support hardware encryption or secure boot features?

Yes-it includes Read-Out Protection (ROP), PC-ROP (PC Read-Out Protection), and active tamper detection. While it lacks a dedicated cryptographic accelerator, its TRNG (three independent oscillators) and 96-bit unique ID support secure key generation and firmware authentication. Secure boot is implemented via boot ROM validation of signed images stored in flash.

How does the integrated SMPS regulator differ from the LDO in system power architecture?

The SMPS step-down converter directly supplies VCORE with high efficiency (up to 92%) across wide load ranges, reducing heat and extending battery life in portable applications. The LDO provides low-noise, fast-transient power for analog peripherals (ADC/DAC/OPAMP) and is used when SMPS noise sensitivity or low-power standby operation is required.

Can the STM32H745XIH6 run both cores independently from separate flash regions?

Yes-the flash memory is partitioned and accessible by both cores with configurable read/write protection. Code for the M7 core typically resides in upper flash sectors, while M4 code occupies lower sectors; inter-core communication occurs via shared TCM RAM or mailbox peripherals with hardware semaphore support for safe synchronization.