STMicroelectronics STM32H755BIT6

Overview

STM32H755BIT6 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 crypto acceleration (AES-256, SHA-2, RNG), and 46 communication/analog peripherals. It targets high-performance industrial control, motor drives, and embedded vision systems requiring deterministic real-time response and secure firmware updates.

For engineers reviewing the STM32H755BIT6 datasheet, STM32H755BIT6 pinout, STM32H755BIT6 application, or STM32H755BIT6 equivalent, key selection criteria include dual-core asymmetric processing capability, on-chip SMPS for power efficiency, hardware JPEG codec and LCD-TFT controller for HMI, and FDCAN FD support for automotive-grade networking.

Technical Context

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

Dual-core operation is coordinated via shared memory, semaphores, and interrupt forwarding; the M7 core handles compute-intensive tasks (e.g., FFT, control loops) using its double-precision FPU and L1 cache (16 KB I-cache + 16 KB D-cache), while the M4 executes real-time I/O management and low-latency control with ART Accelerator-optimized flash execution.

Key Specifications

Pinout & Package

STM32H755BIT6 uses a LQFP144 (20 × 20 mm) package with 144 pins, ECOPACK2-compliant, rated for industrial temperature range (–40 to +85 °C). Pin functions include dedicated VCAP, VDDA/VSSA analog supplies, multiple VDD/VSS groups per domain, and configurable I/Os supporting up to 168 GPIOs with interrupt capability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIT6, the STM32H755BIT6 adds JPEG codec, SMPS, and 1 MB extra flash - critical for HMI-rich, battery-aware, or thermally constrained systems. Versus i.MX RT1176DVMAA, it trades peak M7 speed for integrated analog, security, and power management - favoring consolidated, self-contained embedded designs over external-memory-dependent architectures.

Availability

STM32H755BIT6 is available at Aetrix Electronics and suitable for industrial motor drives, medical edge imaging nodes, secure gateways, and automotive body control modules requiring stable component supply, long-term lifecycle assurance, and qualified industrial temperature operation.

Supply support for STM32H755BIT6 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 analog components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, security, and multimedia capability - combining dual Arm cores, advanced power management, and hardware accelerators to replace FPGA+MPU solutions in cost- and size-constrained systems.

FAQ

What is the maximum operating frequency of each core in the STM32H755BIT6?

The Arm 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 single-precision FPU and ART Accelerator support. Both cores maintain full functionality across the industrial temperature range (–40 to +85 °C) when supplied within specified voltage and decoupling conditions.

Does the STM32H755BIT6 support hardware-accelerated cryptographic operations?

Yes - it integrates dedicated CRYP and HASH peripherals supporting AES-128/192/256, TDES, SHA-1/SHA-224/SHA-256, HMAC, and a true random number generator (RNG). These accelerators operate independently of CPU cores, enabling secure boot, TLS offload, and encrypted firmware updates without degrading real-time performance.

What power supply configurations are supported for the STM32H755BIT6?

The device supports three primary supply configurations: (1) SMPS-only mode (direct VCORE regulation), (2) LDO-only mode (simpler layout, lower noise), or (3) SMPS + LDO hybrid (SMPS for VCORE, LDO for analog domains). Voltage scaling offers six configurable ranges in Run/Stop modes, and a dedicated ~0.9 V backup regulator maintains RTC and backup SRAM during VBAT operation.

How many I/O pins does the STM32H755BIT6 provide in its LQFP144 package?

The STM32H755BIT6 in LQFP144 provides 114 user I/O pins (excluding power, reset, debug, and VCAP pins), all supporting interrupt capability, remappable alternate functions, and flexible pull-up/pull-down configuration. This matches the full 168 GPIO capability of larger packages - functionality is pin-limited, not feature-limited, in this variant.