STMicroelectronics STM32H7A3VGH6Q

Overview

STM32H7A3VGH6Q from STMicroelectronics is a 32-bit Arm® Cortex®-M7 microcontroller operating at up to 280 MHz with double-precision FPU, 2 MB flash, 1.4 MB RAM (including 64 KB ITCM + 128 KB DTCM), and integrated SMPS regulator. It supports dual Octo-SPI interfaces (up to 140 MHz SDR), FMC for NOR/SDRAM/NAND, and advanced analog peripherals including two 16-bit ADCs (3.6 MSPS) and dual DACs. Used in industrial PLCs, motor drives, and medical imaging systems requiring deterministic real-time processing.

For engineers reviewing the STM32H7A3VGH6Q datasheet, STM32H7A3VGH6Q pinout, STM32H7A3VGH6Q application, or STM32H7A3VGH6Q equivalent, key selection criteria include verified 280 MHz CPU performance with L1 cache, confirmed SMPS integration for power efficiency, validated dual Octo-SPI timing specs (140 MHz SDR / 110 MHz DTR), and package-specific I/O count (168 GPIOs in UFBGA176+25).

Technical Context

The STM32H7A3VGH6Q implements a six-stage dual-issue Cortex-M7 core with Harvard architecture, 16 KB instruction and 16 KB data caches, and dynamic branch prediction-enabling single-cycle cache-line fetch from 128-bit embedded flash. Its interconnect matrix comprises one AXI and two AHB bus matrices with five DMA controllers, including a high-speed MDMA for offloading CPU-intensive transfers.

Memory subsystem includes 2 MB dual-bank 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. Peripherals are distributed across four APB, three AHB, and one AXI domain, with clock domains independently gated for power optimization-CPU domain (CD) and smart run domain (SRD) support retention and low-power operation.

Key Specifications

Pinout & Package

UFBGA176+25 package (10 × 10 mm, 0.65 mm ball pitch) with 176 balls plus 25 dedicated test/ground balls. Features 168 general-purpose I/Os, including 164 5-V-tolerant pins, fast I/Os rated up to 133 MHz, and dedicated power/ground distribution for noise-sensitive analog and high-speed digital domains.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7B3VIT6, STM32H7A3VGH6Q trades crypto acceleration for integrated SMPS-making it superior for battery-operated edge devices. Versus STM32H743VIT6, it reduces package size and cost while retaining core compute and memory specs, ideal for space-constrained industrial controls.

Availability

STM32H7A3VGH6Q is available at Aetrix Electronics and suitable for industrial PLCs, medical imaging interfaces, smart HVAC gateways, and wearable health monitors requiring stable component supply across long product lifecycles.

Supply support for STM32H7A3VGH6Q 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 automotive semiconductors since 1987.

The STM32H7 series targets high-end embedded applications demanding real-time determinism, rich connectivity, and graphics capability-specifically engineered for industrial automation, medical diagnostics, and advanced human-machine interfaces.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7A3VGH6Q?

The STM32H7A3VGH6Q 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 performance. The device supports voltage scaling in Run and Stop modes, and junction temperature is rated from −40 °C to 130 °C.

Does STM32H7A3VGH6Q include hardware security features beyond ROP and PC-ROP?

Yes-it supports active tamper detection with dedicated tamper pins, secure firmware upgrade via authenticated boot and flash write protection, and a NIST SP 800-90B compliant true random number generator. However, unlike the STM32H7B3, it does not integrate AES-256 or public-key acceleration (PKA); those require external co-processors or software libraries.

How many Octo-SPI interfaces does STM32H7A3VGH6Q support, and what memory types are compatible?

The STM32H7A3VGH6Q supports two Octo-SPI interfaces, each capable of driving serial PSRAM, NOR flash, HyperRAM, or Hyperflash in SDR or DTR modes. Maximum speeds are 140 MHz in SDR and 110 MHz in DTR. Both interfaces operate in muxed mode and share pins with other peripherals like FMC or SPI, requiring careful pin assignment in layout.

Is the SMPS regulator in STM32H7A3VGH6Q configurable for different output voltages?

No-the integrated SMPS is fixed to supply VCORE at 1.2 V (VOS0 range) or 1.0 V (VOS1/VOS2), selected via software-controlled voltage scaling. It cannot be reconfigured to output arbitrary voltages; external regulators are required for non-core rails such as VDDIO or VDDA, which remain tied to the main 1.62–3.6 V supply.