STMicroelectronics STM32H7B3VIT6Q

Overview

STM32H7B3VIT6Q from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz with double-precision FPU, 2 Mbytes of flash memory, 1.4 Mbytes of RAM (including 64 Kbytes ITCM + 128 Kbytes DTCM), and integrated SMPS regulator. It supports dual Octo-SPI interfaces with on-the-fly AES-128 decryption, hardware JPEG codec, and cryptographic acceleration (AES-128/192/256, SHA-2, HMAC, TRNG). Used in high-performance industrial HMI, motor control, and secure IoT edge nodes.

For engineers reviewing the STM32H7B3VIT6Q datasheet, STM32H7B3VIT6Q pinout, STM32H7B3VIT6Q application, or STM32H7B3VIT6Q equivalent, key selection criteria include verified 280 MHz real-time execution capability, dual-bank flash with RWW support, TCM RAM partitioning for deterministic ISR latency, Octo-SPI security features, and SMPS integration for power-constrained designs.

Technical Context

The device implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data L1 caches, and tightly coupled memory interfaces enabling single-cycle access to ITCM/DTCM. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers-including MDMA for high-bandwidth peripheral-to-memory transfers.

Memory subsystem includes 2 MB flash with read-while-write, 192 KB TCM RAM (64 KB ITCM + 128 KB DTCM), 1.18 MB user SRAM, and 4 KB backup SRAM. Dual Octo-SPI controllers operate up to 140 MHz (SDR) and 110 MHz (DTR), each paired with dedicated OTFDEC AES-128 engines for real-time external memory decryption.

Key Specifications

Pinout & Package

STM32H7B3VIT6Q is housed in a 100-pin LQFP package (14 mm × 14 mm, 0.5 mm pitch), ECOPACK2-compliant, with 75 GPIOs supporting interrupt capability, 68 of which are 5-V-tolerant. The package provides dedicated pins for SMPS feedback (VFBSMPS), core voltage regulation (VCAP/VDDLDO), dual Octo-SPI buses (OCTOSPI1/OCTOSPI2), and separate VDDMMC supply for SDMMC interface isolation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance Cortex-M7 MCU applications.

Compared with STM32H743VIT6, STM32H7B3VIT6 trades FMC for integrated SMPS and dual OTFDEC-optimizing for compact, self-powered secure edge nodes. Versus STM32H753VIT6, it omits PKA but retains identical power and memory security features at lower cost and die size.

Availability

STM32H7B3VIT6Q is available at Aetrix Electronics and suitable for industrial motor control, secure edge gateways, medical imaging front-ends, and HMI systems requiring stable component supply across extended product lifecycles.

Supply support for STM32H7B3VIT6Q 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 analog products for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, security, and graphics capabilities-specifically engineered for industrial automation, medical devices, and next-generation human-machine interfaces.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32H7B3VIT6Q achieves 280 MHz via its Arm Cortex-M7 core with six-stage dual-issue pipeline, dynamic branch prediction, and 16 KB instruction/data L1 caches. This frequency is sustained under full load only when powered by the integrated SMPS or external 1.2 V supply, with VDD ≥ 2.7 V and proper PCB decoupling per DS13139 Section 6.2.1.

Does STM32H7B3VIT6Q support secure boot from external Octo-SPI memory?

Yes-dual OTFDEC AES-128 engines enable real-time decryption of boot images stored in external Octo-SPI NOR/PSRAM. The ROM bootloader verifies signature integrity using public keys stored in OTP, then loads decrypted code directly into ITCM RAM without exposing plaintext in external memory.

How many I/Os are 5-V-tolerant and what is their maximum toggle rate?

STM32H7B3VIT6Q provides 68 5-V-tolerant I/Os across its 100-pin LQFP package. These pins support up to 133 MHz toggle rate when VDD ≥ 2.7 V and HSLV mode is disabled; at VDD < 2.7 V, HSLV must be enabled on supported pins (per Table 90/91 in DS13139) to maintain speed.

What debug interfaces are supported and what trace capability is available?

The device supports SWD and JTAG debug interfaces. It includes a 4 KB Embedded Trace Buffer (ETB) for instruction and data trace, compatible with ARM CoreSight tools. Full trace requires external debugger (e.g., ST-LINK V3) and SWO pin routing; ETB captures trace data when SWO is unavailable or bandwidth-constrained.