STMicroelectronics STM32H7A3VIT6

Overview

STM32H7A3VIT6 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 targets high-performance embedded applications requiring real-time signal processing, graphics acceleration, and multi-interface connectivity - such as industrial HMIs and motor control systems.

For engineers reviewing the STM32H7A3VIT6 datasheet, STM32H7A3VIT6 pinout, STM32H7A3VIT6 application, or STM32H7A3VIT6 equivalent, key selection criteria include its dual-bank flash architecture with read-while-write capability, 168 GPIOs with 133 MHz toggle rate, dual CAN FD + TT-CAN support, JPEG hardware codec, and LCD-TFT controller with Chrom-ART DMA2D accelerator.

Technical Context

The STM32H7A3VIT6 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 enabling deterministic execution of time-critical routines. Its interconnect matrix comprises one AXI and two AHB bus matrices, five DMA controllers (including MDMA and DFSDM-dedicated DMA), and domain-level power gating for CPU and Smart Run Domains.

It integrates two Octo-SPI interfaces supporting HyperRAM/PSRAM/NOR in SDR (up to 140 MHz) and DTR (up to 110 MHz) modes, plus a flexible external memory controller for SDRAM, NAND, and SRAM with clocking up to 125 MHz. Analog subsystem includes two 16-bit ADCs (3.6 MSPS), two operational amplifiers (8 MHz GBW), and dual 12-bit DACs (one single-channel, one dual-channel).

Key Specifications

Pinout & Package

LQFP100 package (14 × 14 mm, 0.5 mm pitch) with exposed thermal pad; RoHS-compliant ECOPACK2; operates from −40 °C to +85 °C ambient temperature range.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7A3VIT6, the STM32H7B3VIT6 trades SMPS integration for extra SRAM and extended temperature rating, while the STM32H743VIT6 offers broader memory interface flexibility at the cost of graphics and power-integration features - making the H7A3 optimal for space-constrained, battery-aware, graphics-enabled edge controllers.

Availability

STM32H7A3VIT6 is available at Aetrix Electronics and suitable for industrial HMIs, smart motor drives, medical imaging gateways, and building automation controllers requiring stable component supply across long-lifecycle production programs.

Supply support for STM32H7A3VIT6 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, rich peripheral integration, and energy efficiency - with the H7A3 variant specifically optimized for graphics-enabled, low-power, and cost-sensitive industrial edge nodes.

FAQ

What is the maximum operating frequency and core type of the STM32H7A3VIT6?

The STM32H7A3VIT6 features an Arm® Cortex®-M7 core running at up to 280 MHz with double-precision floating-point unit (FPU) and memory protection unit (MPU). Its 6-stage dual-issue pipeline, 16 KB instruction cache, and 16 KB data cache deliver 599 DMIPS (2.14 DMIPS/MHz) per Dhrystone 2.1 benchmark, enabling high-throughput real-time computation.

Does the STM32H7A3VIT6 support hardware-accelerated graphics and image compression?

Yes - it integrates Chrom-ART Accelerator (DMA2D) for 2D graphics operations including memory-to-memory copy, alpha blending, and color format conversion, plus a dedicated hardware JPEG codec supporting both compression and decompression. These accelerators reduce CPU load by up to 70% in GUI and imaging applications, enabling smooth XGA display updates and real-time image processing.

What power management features does the STM32H7A3VIT6 offer for low-power applications?

The device includes an integrated SMPS step-down converter, configurable LDO, and backup regulator. It achieves 32 µA in Stop mode (full RAM retention), 2.8 µA in Standby (RTC + LSE active), and 0.8 µA in VBAT mode (RTC + LSE only). Domain-level power gating separates CPU and Smart Run Domains, allowing selective shutdown of non-critical peripherals without affecting real-time functions.

Which communication interfaces are supported for industrial fieldbus connectivity?

The STM32H7A3VIT6 supports two CAN FD controllers (5 Mbps) and one time-triggered CAN (TT-CAN) interface compliant with ISO 11898-1:2015, plus four I2C FM+ interfaces, six SPIs (four with I2S audio mode), two SDMMC ports, and USB OTG HS/FS. These interfaces meet requirements for PROFINET, CANopen, and BACnet implementations in industrial control systems.