STMicroelectronics STM32H7A3VIH6

Overview

STM32H7A3VIH6 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 gateways.

For engineers reviewing the STM32H7A3VIH6 datasheet, STM32H7A3VIH6 pinout, STM32H7A3VIH6 application, or STM32H7A3VIH6 equivalent, key selection considerations include its dual-bank flash with read-while-write capability, 168 GPIOs with 133 MHz toggle rate, dual Octo-SPI interfaces supporting HyperRAM at 110 MHz DTR, and hardware JPEG codec for vision-enabled edge devices.

Technical Context

The device implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, enabling single-cycle cache-line fill from 128-bit flash. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers - including a high-speed MDMA - to offload CPU bandwidth-intensive transfers.

Memory subsystem includes TCM RAM for time-critical routines, 1.18 MB user SRAM on AHB/AXI buses, and flexible external memory support via FMC (NOR/SDRAM/NAND) and dual Octo-SPI (SRD/DTR modes). Power management features two independent domains (CPU and Smart Run), voltage scaling, and sub-3 µA Standby mode with RTC retention.

Key Specifications

Pinout & Package

STM32H7A3VIH6 is housed in a UFBGA176+25 package (10 mm × 10 mm, 0.65 mm ball pitch), optimized for high-density PCB layouts with dedicated power/ground balls enhancing EMI performance and thermal dissipation. The package supports 168 general-purpose I/Os, including 164 5-V-tolerant pins and fast I/Os capable of 133 MHz toggle rates.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7B3VIH6, the STM32H7A3VIH6 trades flash capacity for integrated SMPS and lower thermal envelope - making it optimal for space-constrained, battery-backed, or thermally sensitive edge nodes. Against STM32H743VIT6, it delivers superior memory expansion via Octo-SPI and reduced system-level power complexity, justifying its use in next-gen HMI and vision-capable controllers.

Availability

STM32H7A3VIH6 is available at Aetrix Electronics and suitable for industrial HMIs, smart motor drives, medical imaging edge nodes, and building automation gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H7A3VIH6 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 components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, rich graphics, and heterogeneous connectivity - with the H7A3 variant specifically optimized for cost-sensitive, power-aware systems integrating SMPS and Octo-SPI memory expansion.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7A3VIH6?

The STM32H7A3VIH6 operates at up to 280 MHz with a supply voltage range of 1.62 V to 3.6 V. At voltages below 2.7 V, the I/O high-speed low-voltage (HSLV) feature must be enabled for full 133 MHz GPIO toggle performance. The embedded SMPS regulator supports direct VCORE supply down to 1.05 V in VOS0 mode, enabling dynamic voltage scaling for power optimization.

Does STM32H7A3VIH6 support external memory interfaces beyond Octo-SPI?

Yes - it includes a Flexible Memory Controller (FMC) supporting NOR flash, PSRAM, NAND flash (8/16-bit), and SDRAM/LPSDR SDRAM with up to 125 MHz synchronous clocking. The FMC and dual Octo-SPI operate independently, allowing simultaneous use - for example, Octo-SPI for HyperRAM framebuffer and FMC for NOR code storage.

How many analog-to-digital converters does STM32H7A3VIH6 integrate, and what are their key specifications?

It integrates two 16-bit ADCs with up to 24 input channels and 3.6 MSPS aggregate sampling rate. Each ADC supports hardware oversampling, injected/conversion sequences, and analog watchdogs. They share common voltage references (VREF+, VDDA) and are synchronized for precise phase-shifted sampling in motor control applications.

Can STM32H7A3VIH6 execute secure firmware updates in the field?

Yes - it supports secure firmware upgrade via ROP (Read-Out Protection), PC-ROP (Program Counter Read-Out Protection), active tamper detection, and cryptographic acceleration (AES-128/256, SHA-256, PKA). These features enable authenticated, encrypted OTA updates with rollback protection and anti-rollback enforcement in trusted execution environments.