STMicroelectronics STM32H755ZIT6

Overview

STM32H755ZIT6 from STMicroelectronics is a dual-core 32-bit Arm® Cortex®-M7 (480 MHz) + Cortex®-M4 (240 MHz) microcontroller with 2 MB flash, 1 MB RAM (192 KB TCM), integrated SMPS regulator, hardware JPEG codec, and cryptographic acceleration (AES-256, SHA-2, RNG). It serves as a high-performance application processor in industrial HMI, motor control gateways, and edge AI inference nodes requiring deterministic real-time response and rich peripheral integration.

For engineers reviewing the STM32H755ZIT6 datasheet, STM32H755ZIT6 pinout, STM32H755ZIT6 application, or STM32H755ZIT6 equivalent, key selection considerations include dual-core asymmetric execution capability, 168 GPIOs with interrupt support, TFBGA240+25 package pin mapping, and domain-specific power management across D1/D2/D3 domains.

Technical Context

The device implements a triple-domain power architecture (D1 for M7 core & graphics, D2 for comms peripherals, D3 for reset/clock/power control), enabling independent clock gating and voltage scaling across six configurable ranges. Its interconnect matrix comprises one AXI and two AHB bus matrices with five AHB2-APB and two AXI2-AHB bridges to manage concurrent high-bandwidth traffic from up to 35 communication interfaces.

Dual-core operation is coordinated via shared memory with hardware semaphore support and cache coherency maintained through L1 instruction/data caches (16 KB each on M7) and ART Accelerator for flash access. The MDMA controller supports linked-list DMA transfers, while dual-port DMAs offload CPU-intensive data movement for ADC, camera, and audio streams.

Key Specifications

Pinout & Package

STM32H755ZIT6 uses a TFBGA240+25 (14 × 14 mm) package with 240 balls plus 25 dedicated VSS/VDD pairs, supporting fine-pitch PCB layout and thermal dissipation for sustained 480 MHz operation. Pin functions are validated per ST's DS12919 Rev 3, Section 5 (Pinout, pin description and alternate functions).

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 STM32H745ZIT6, the STM32H755ZIT6 adds JPEG codec and 1 MB extra flash for firmware flexibility; versus i.MX RT1176DVMAA, it integrates SMPS, analog front-end, and flash-reducing external components and simplifying certification for industrial safety standards.

Availability

STM32H755ZIT6 is available at Aetrix Electronics and suitable for industrial motor control gateways, edge AI vision nodes, human-machine interfaces, and secure industrial gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H755ZIT6 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 management ICs, sensors, and automotive semiconductors since 1987.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and advanced security - specifically engineered for industrial automation, medical imaging, and intelligent edge devices.

FAQ

What is the maximum operating frequency of each core in the STM32H755ZIT6?

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 support, achieving 300 DMIPS. Both frequencies are validated under full voltage scaling range 0 (1.26 V) per DS12919 Rev 3, Section 6.3.4.

Does the STM32H755ZIT6 support external SDRAM, and what interface is used?

Yes, it supports external SDRAM up to 125 MHz using the Flexible Memory Controller (FMC) with a 32-bit data bus. The FMC also handles PSRAM, NOR/NAND flash, and SRAM. Configuration requires precise timing parameters from Section 6.3.18 of DS12919 Rev 3 and proper PCB layout for signal integrity.

How does the SMPS regulator integrate with the core voltage supply?

The integrated SMPS step-down converter directly supplies VCORE and can optionally power external circuitry. It requires two external components: a 2.2 µH inductor and a 22 µF output capacitor. VCAP_1/VCAP_2 pins must be decoupled with 2.2 µF ceramics to stabilize regulation, as specified in Section 6.3.3 of the datasheet.

Can the STM32H755ZIT6 execute code from external Quad-SPI flash memory?

Yes, it supports XIP (execute-in-place) from Quad-SPI flash via the QUADSPI interface running up to 133 MHz. The ART Accelerator caches instruction fetches to eliminate wait states, enabling near-zero latency execution. This configuration is validated in AN5190 and requires proper memory-mapped address setup in the system linker script.