STMicroelectronics STM32H755ZIT3

Overview

STM32H755ZIT3 from STMicroelectronics is a dual-core Arm® Cortex®-M7 (480 MHz) and Cortex®-M4 (240 MHz) microcontroller with 2 MB flash, 1 MB RAM (192 KB TCM + 864 KB SRAM), integrated SMPS regulator, and hardware crypto acceleration (AES-256, SHA-2, RNG). It supports real-time deterministic control in industrial PLCs, motor drives, and edge AI inference at the device level.

For engineers reviewing the STM32H755ZIT3 datasheet, STM32H755ZIT3 pinout, STM32H755ZIT3 application, or STM32H755ZIT3 equivalent, key selection criteria include dual-core asymmetric processing capability, on-chip SMPS for power efficiency, 16-bit ADC (3.6 MSPS), FDCAN FD support, and TFBGA240+25 package compatibility with high-density PCB layouts.

Technical Context

The device implements a three-domain power architecture (D1/D2/D3) enabling independent 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 bridges, supporting concurrent high-bandwidth data movement between CPU, DMA, and peripherals.

Dual-core operation is coordinated via shared memory, mailbox, and semaphore mechanisms; the M7 core handles compute-intensive tasks (e.g., FFT, JPEG decode) using its 32 KB L1 cache and double-precision FPU, while the M4 executes real-time I/O control with ART Accelerator-optimized flash execution and dedicated 128 KB DTCM RAM.

Key Specifications

Pinout & Package

STM32H755ZIT3 uses a 240-ball TFBGA package with 25 additional balls for VSS/VDD decoupling and thermal management. The package supports fine-pitch routing and high I/O density (up to 168 GPIOs), optimized for compact industrial and automotive control modules.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIT6, the STM32H755ZIT3 delivers 2× flash, integrated SMPS, and FDCAN FD-critical for compact, energy-efficient, and safety-certifiable designs. Against i.MX RT1176DVMAA, it trades raw CPU speed for on-die flash, analog peripherals, and functional safety primitives-making it preferable for certified industrial control over general-purpose edge computing.

Availability

STM32H755ZIT3 is available at Aetrix Electronics and suitable for industrial PLCs, motor drives, edge AI gateways, and secure industrial gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H755ZIT3 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, specializing in microcontrollers, power management, sensors, and automotive ICs with vertical manufacturing and broad IP portfolio.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, security, and heterogeneous processing-designed for industrial automation, digital power, and intelligent edge devices.

FAQ

What is the maximum operating frequency of each core in the STM32H755ZIT3?

The Cortex-M7 core operates at up to 480 MHz with 1027 DMIPS performance and double-precision FPU, while the Cortex-M4 core runs at up to 240 MHz with 300 DMIPS and single-precision FPU. Both cores support independent voltage scaling and clock gating to optimize power versus performance in mixed-workload applications.

Does the STM32H755ZIT3 support hardware encryption for secure boot?

Yes. It integrates AES-128/192/256, HASH (MD5, SHA-1, SHA-2), HMAC, and a true random number generator (TRNG) to implement secure boot with cryptographic signature verification, encrypted firmware images, and runtime key protection using ROP/PC-ROP and active tamper detection.

How does the SMPS regulator improve power efficiency compared to traditional LDOs?

The integrated SMPS step-down converter achieves >90% efficiency at 200–500 mA loads, reducing heat dissipation by ~30% versus an LDO solution. It supports dynamic voltage scaling across six levels and can supply both VCORE and external circuitry, simplifying power tree design in space-constrained applications.

Can the STM32H755ZIT3 interface directly with a 16-bit parallel camera sensor?

Yes. Its 8- to 14-bit Digital Camera Interface (DCMI) supports up to 80 MHz pixel clock and 16-bit parallel data capture with embedded synchronization (HSYNC/VSYNC/PCLK). It includes FIFO buffering and DMA handoff to both cores, enabling real-time frame acquisition for machine vision preprocessing.