STMicroelectronics STM32H7B3VIH6

Overview

STM32H7B3VIH6 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 delivers 599 DMIPS (2.14 DMIPS/MHz) and supports real-time motor control, industrial PLCs, and high-resolution LCD-TFT displays.

For engineers reviewing the STM32H7B3VIH6 datasheet, STM32H7B3VIH6 pinout, STM32H7B3VIH6 application, or STM32H7B3VIH6 equivalent, key selection factors include dual Octo-SPI with on-the-fly AES decryption, 2× CAN FD + 1× TT-CAN, hardware JPEG codec, Chrom-ART accelerator, and 168 GPIOs with 133 MHz toggle rate - critical for deterministic embedded vision and secure edge compute designs.

Technical Context

The STM32H7B3VIH6 implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, and tightly coupled memory interfaces (ITCM/DTCM) enabling zero-wait-state execution of time-critical routines. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers including MDMA for high-bandwidth peripheral offload.

It integrates dual Octo-SPI interfaces supporting SDR/DTR modes up to 140/110 MHz with hardware OTFDEC AES-128 decryption, plus an FMC supporting NOR/PSRAM/SDRAM/NAND - enabling secure, high-throughput external memory expansion without CPU intervention. The device features two independent power domains (CPU domain and Smart Run Domain) with fine-grained clock gating and voltage scaling across Run/Stop modes.

Key Specifications

Pinout & Package

STM32H7B3VIH6 is housed in a UFBGA176+25 package (10 × 10 mm, 0.65 mm ball pitch), optimized for thermal dissipation and high-density routing. The package includes 25 dedicated power/ground balls to reduce noise and improve signal integrity in mixed-signal applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H743VIT6, the STM32H7B3VIH6 trades peak frequency (280 vs. 480 MHz) and DDR3 support for integrated SMPS and dual OTFDEC - optimizing for compact, battery-aware, and cryptographically secured edge devices. Versus STM32H753VIH6, it retains SMPS at the cost of PKA - favoring power-constrained industrial control over cloud PKI workloads.

Availability

STM32H7B3VIH6 is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging edge nodes, secure building automation gateways, and high-resolution industrial HMIs requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for STM32H7B3VIH6 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, advanced graphics, hardware security, and ultra-low power - specifically engineered for industrial control, medical devices, and intelligent edge computing.

FAQ

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

The STM32H7B3VIH6 achieves 280 MHz using its Arm Cortex-M7 core with six-stage dual-issue pipeline, dynamic branch prediction, and 16 KB instruction/data caches. This frequency is sustained with 1.2 V VCORE supplied by the integrated SMPS regulator and validated across –40°C to +85°C ambient temperature. No external PLL configuration is required beyond the default system clock tree setup in RCC.

Does STM32H7B3VIH6 support secure boot and firmware updates?

Yes. It supports secure boot via ROP (Read-Out Protection) Level 1/2 and PC-ROP (Program Counter Read-Out Protection), along with secure firmware upgrade using AES-GCM authenticated encryption and hash verification. The bootloader supports FDCAN and USB-DFU, and OTFDEC engines enable encrypted execution directly from external Octo-SPI flash without exposing decrypted code in RAM.

How does the UFBGA176+25 package differ from standard UFBGA176?

The UFBGA176+25 package adds 25 dedicated balls for power distribution (VDD/VSS/VDDA/VSSA/VCAP/VDDSMPS/VSSSMPS), improving power integrity and reducing noise coupling between digital, analog, and SMPS domains. These extra balls are not I/Os - they enhance thermal performance and stability under high-frequency, high-current operation typical in motor control and graphics applications.

Can STM32H7B3VIH6 drive a 1024×768 RGB display without external memory?

Yes. Its integrated LCD-TFT controller (LTDC) supports XGA resolution, and the 192 KB TCM RAM (64 KB ITCM + 128 KB DTCM) can buffer full-frame RGB565 (1.5 MB) using Chrom-ART's line-by-line DMA2D blitting. For continuous animation, external Octo-SPI HyperRAM (via OTFDEC) extends framebuffer capacity while maintaining security and bandwidth.