STMicroelectronics STM32H745IGT6

Overview

STM32H745IGT6 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 (including 192 KB TCM), integrated SMPS regulator, and 168 GPIOs. It supports industrial motor control, real-time vision processing, and secure IoT edge gateways requiring deterministic dual-core coordination and high-bandwidth peripheral concurrency.

For engineers reviewing the STM32H745IGT6 datasheet, STM32H745IGT6 pinout, STM32H745IGT6 application, or STM32H745IGT6 equivalent, key selection criteria include dual-core clock domain isolation, SMPS vs LDO supply configuration, TCM RAM allocation for time-critical M7/M4 tasks, and FDCAN/USB OTG/Ethernet coexistence in shared memory space.

Technical Context

The device implements three independent power domains (D1/D2/D3) enabling selective clock gating and voltage scaling across performance, communication, and system-control subsystems. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges, ensuring low-latency access for MDMA, dual-port DMAs, and CPU cores to peripherals including FMC, QUADSPI, and Ethernet MAC.

Dual-core operation is coordinated via shared memory with hardware semaphores and interrupt forwarding; the M7 core handles high-throughput signal processing (JPEG codec, DFSDM, LCD-TFT controller), while the M4 executes real-time control loops (motor timers, ADC acquisition) with ART Accelerator-optimized flash execution and TCM-resident code.

Key Specifications

Pinout & Package

STM32H745IGT6 uses the LQFP176 (24×24 mm) package with 176 leads and 25 exposed thermal pad. Pin functions are defined per ST's official pin description table (DS12923 Rev 3, Section 5), supporting multiple alternate functions per pin including FMC, QUADSPI, SDMMC, and analog inputs.

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 STM32H745IGT6, the H755IIT6 adds cryptographic acceleration but shares identical dual-core timing behavior and memory architecture, while the H743VIT6 sacrifices vision/peripheral bandwidth and power efficiency for smaller footprint and lower system cost.

Availability

STM32H745IGT6 is available at Aetrix Electronics and suitable for industrial motor control, edge AI vision gateways, secure industrial gateways, and high-resolution HMI applications requiring stable component supply across multi-year production cycles.

Supply support for STM32H745IGT6 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, designing and manufacturing microcontrollers, power ICs, sensors, and automotive-grade components since 1987.

The STM32H7 series targets high-performance embedded applications demanding real-time determinism, heterogeneous processing, and integrated analog/multimedia peripherals-specifically engineered for industrial automation, medical imaging, and next-generation IoT edge nodes.

FAQ

What is the maximum operating frequency of each core in STM32H745IGT6?

The Cortex-M7 core operates up to 480 MHz with double-precision FPU and 16 KB instruction/16 KB data cache, delivering 1027 DMIPS. The Cortex-M4 core runs up to 240 MHz with single-precision FPU and ART Accelerator, achieving 300 DMIPS. Both frequencies are achievable simultaneously under SMPS-supplied VCORE at 1.2 V with full voltage scaling enabled.

Does STM32H745IGT6 support hardware JPEG encoding and decoding?

Yes, STM32H745IGT6 integrates a dedicated hardware JPEG codec supporting both encoding and decoding of baseline JPEG images. It operates independently of CPU cores, accepts YUV422/RGB565 input via DMA, and outputs compressed bitstreams directly to memory or peripherals-reducing M7 core load by >85% versus software-only implementations.

How does the SMPS regulator differ from the LDO in STM32H745IGT6?

The integrated SMPS step-down converter replaces the traditional LDO for VCORE supply, improving power efficiency by ~30% at medium-to-high loads. It requires external 2.2 µF VCAP capacitors and supports dynamic voltage scaling across six ranges. The LDO remains available as a backup or for low-noise analog domain supply, but SMPS is mandatory for full 480 MHz M7 operation.

Can STM32H745IGT6 run both cores independently with different real-time operating systems?

Yes-each core has independent NVIC, MPU, and memory mapping. Engineers commonly deploy FreeRTOS on the M4 for motor control and Zephyr or ThreadX on the M7 for networking and UI. Inter-core communication uses mailbox registers, shared memory with semaphores, and event forwarding, all supported by ST's HAL and CMSIS-RTOS APIs without kernel modification.