STMicroelectronics STM32H745BGT6

Overview

STM32H745BGT6 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 I/O handling.

For engineers reviewing the STM32H745BGT6 datasheet, STM32H745BGT6 pinout, STM32H745BGT6 application, or STM32H745BGT6 equivalent, key selection criteria include dual-core asymmetric execution capability, on-chip SMPS for power efficiency, hardware JPEG codec for image processing, and dual CAN FD interfaces for automotive and industrial networking.

Technical Context

The device implements a three-domain power architecture (D1/D2/D3), enabling independent clock gating and voltage scaling across high-performance, peripheral, and system-control subsystems. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB bridges, supporting concurrent high-bandwidth data flows between CPU cores, DMA controllers, and peripherals.

Dual-core operation is coordinated via shared memory, mailbox, and semaphore mechanisms, with the M7 core handling compute-intensive tasks (e.g., FFT, control loops) while the M4 manages real-time I/O (CAN FD, USB OTG, SDMMC). The ART Accelerator enables zero-wait-state execution from flash at 240 MHz for the M4 core.

Key Specifications

Pinout & Package

STM32H745BGT6 uses the LQFP144 (20 × 20 mm) package with 144 pins, ECOPACK2-compliant, rated for industrial temperature range (–40 °C to +85 °C). Pin functions include dedicated VCAP, VDDA/VSSA analog supplies, multiple VDD/VSS power domains, and configurable alternate-function I/Os supporting all major peripheral mappings.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual-core Arm Cortex-M7/M4 microcontroller applications.

Compared with STM32H755BIT6, the STM32H745BGT6 trades cryptographic acceleration for lower cost and identical power efficiency; versus i.MX RT1176DVMAA, it delivers superior low-power operation and integrated SMPS but lacks GPU and MIPI support-making it optimal for cost-sensitive, battery-aware industrial edge nodes.

Availability

STM32H745BGT6 is available at Aetrix Electronics and suitable for industrial motor drives, embedded vision systems, automotive body controllers, and programmable logic controllers requiring stable component supply across multi-year production cycles.

Supply support for STM32H745BGT6 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, Switzerland, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32H7 series targets high-end embedded applications demanding real-time performance, security, and energy efficiency-designed specifically for industrial automation, automotive ADAS, and AI-at-the-edge systems.

FAQ

What is the maximum operating frequency of each core in the STM32H745BGT6?

The Arm Cortex-M7 core operates at up to 480 MHz with double-precision FPU and L1 cache (16 KB instruction + 16 KB data); the Cortex-M4 core runs at up to 240 MHz with single-precision FPU and ART Accelerator support. Both cores maintain full MPU protection and independent clock domains, enabling asymmetric multiprocessing without frequency coupling.

Does the STM32H745BGT6 support hardware encryption?

No-the STM32H745BGT6 does not include dedicated cryptographic accelerators (AES, PKA, HASH). Hardware encryption is available in the pin-compatible STM32H755BIT6 variant. For basic secure boot, STM32H745BGT6 relies on ROP, PC-ROP, and active tamper detection, but lacks runtime cipher acceleration.

Can the STM32H745BGT6 run both cores simultaneously from different memory regions?

Yes-each core has dedicated TCM RAM (ITCM/DTCM for M7; DTCM for M4), allowing independent code execution from tightly coupled memory. Shared SRAM and external memories (via FMC/QUADSPI) are accessible by both cores with hardware semaphore and mailbox synchronization, enabling true concurrent operation without memory contention.

What is the role of the SMPS regulator in the STM32H745BGT6 power architecture?

The integrated SMPS step-down converter directly supplies the VCORE domain (1.05–1.32 V) with higher efficiency than the LDO, reducing total system power consumption-especially critical in battery-backed or thermally constrained applications. It supports dynamic voltage scaling across six ranges and can be bypassed in favor of the LDO for noise-sensitive analog workloads.