STMicroelectronics STM32H755BIT3

Overview

STM32H755BIT3 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (480 MHz) and Cortex®-M4 (240 MHz) microcontroller with 2 MB flash, 1 MB RAM (including 192 KB TCM), integrated SMPS regulator, hardware JPEG codec, and cryptographic accelerators (AES-256, SHA-2, RNG). It targets high-performance embedded applications requiring real-time processing, secure firmware updates, and rich peripheral integration - such as industrial HMI, motor control gateways, and edge AI inference nodes.

For engineers reviewing the STM32H755BIT3 datasheet, STM32H755BIT3 pinout, STM32H755BIT3 application, or STM32H755BIT3 equivalent, key selection considerations include dual-core asymmetric execution capability, voltage scaling across six power ranges, 240-pin TFBGA package pin mapping, and support for CAN FD + TT-CAN in safety-critical automotive gateway designs.

Technical Context

The device implements three independent power domains (D1/D2/D3) enabling selective clock gating and domain shutdown - D1 hosts the M7 core and high-speed peripherals, D2 manages communication interfaces and timers, and D3 handles reset/clock/power control. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges to decouple bandwidth contention between CPU, DMA, and peripherals.

Dual-core operation is coordinated via shared memory, mailbox, and semaphore mechanisms; the M7 executes time-critical tasks with L1 cache (16 KB I-cache + 16 KB D-cache), while the M4 handles communication stacks and sensor fusion using ART Accelerator for zero-wait-state flash execution. Both cores feature MPU, FPU, and DSP instructions, with deterministic interrupt latency ensured by NVIC and EXTI subsystems.

Key Specifications

Pinout & Package

STM32H755BIT3 is housed in a 240-ball TFBGA package (14 × 14 mm, 0.8 mm pitch) with 25 additional balls for VSS/VDD decoupling and thermal management. The package complies with ECOPACK2 environmental standards and supports extended temperature operation up to 125 °C.

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 STM32H743VIT6, the STM32H755BIT3 adds SMPS, JPEG codec, TT-CAN, and larger memory - making it superior for thermally constrained, feature-rich edge nodes; versus i.MX RT1176DVMAA, it trades raw speed for integrated flash, lower power, and automotive-ready peripherals.

Availability

STM32H755BIT3 is available at Aetrix Electronics and suitable for industrial HMI gateways, automotive body controllers, programmable logic controller edge nodes, and AI-enabled predictive maintenance sensor hubs requiring stable component supply across multi-year production cycles.

Supply support for STM32H755BIT3 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 with vertical manufacturing capabilities.

The STM32H7 series is designed for high-end embedded applications demanding real-time performance, security, and rich connectivity - targeting industrial automation, automotive gateways, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency of each core in the STM32H755BIT3?

The Arm Cortex-M7 core operates at up to 480 MHz with double-precision FPU and L1 cache (16 KB instruction + 16 KB data), 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 support independent voltage scaling and clock gating for dynamic power management.

Does the STM32H755BIT3 support hardware-accelerated cryptography?

Yes - it integrates dedicated cryptographic accelerators for AES-128/192/256, TDES, HASH (MD5, SHA-1, SHA-2), HMAC, and a true random number generator (RNG). These modules operate independently of the CPU cores, enabling secure boot, encrypted firmware updates, and TLS handshake acceleration without compromising real-time performance.

What power supply configurations does the STM32H755BIT3 support?

The device supports three primary supply configurations: (1) SMPS step-down converter directly powering VCORE (1.1 V), (2) internal LDO supplying VCORE, or (3) external SMPS with internal LDO for I/O. It features six voltage scaling ranges in Run/Stop modes and a dedicated ~0.9 V backup regulator for RTC and backup SRAM retention during VBAT operation.

How many GPIOs are available, and what advanced functions do they support?

Up to 168 GPIOs are available, each supporting interrupt capability and multiple alternate functions. Key advanced capabilities include event generation for low-power wake-up, configurable slew rate and drive strength, analog switching for ADC/DAC multiplexing, and hardware-controlled pull-up/pull-down resistors. All GPIOs comply with 1.62–3.6 V I/O tolerance and support glitch filtering.