STMicroelectronics STM32H7A3QIY6QTR

Overview

STM32H7A3QIY6QTR 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 STM32H7A3QIY6QTR datasheet, STM32H7A3QIY6QTR pinout, STM32H7A3QIY6QTR application, or STM32H7A3QIY6QTR equivalent, key selection criteria include its dual-bank flash with read-while-write, octo-SPI interfaces supporting HyperRAM at 140 MHz SDR, LCD-TFT controller with XGA support, hardware JPEG codec, and 2× CAN FD + 1× TT-CAN controllers.

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 embedded 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 for concurrent peripheral streaming.

Power architecture features two independent domains: CPU Domain (CD) and Smart Run Domain (SRD), each with configurable clock gating and voltage scaling. The integrated SMPS step-down converter directly supplies VCORE, reducing system BOM count and improving efficiency over LDO-only solutions in battery- or thermally constrained designs.

Key Specifications

Pinout & Package

STM32H7A3QIY6QTR is housed in a WLCSP132 package (4.57 × 4.37 mm), optimized for space-constrained portable and wearable applications. This ultra-compact wafer-level chip-scale package features 132 solder bumps with I/Os arranged in a 12×11 grid, supporting fine-pitch PCB assembly and thermal performance comparable to larger QFN alternatives.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7B3IIT6, the STM32H7A3QIY6QTR trades flash capacity for integrated SMPS and octo-SPI - making it superior for space- and power-constrained edge devices. Versus STM32H743VIT6, it offers smaller footprint, better power efficiency, and modern memory interfaces at the cost of fewer general-purpose pins.

Availability

STM32H7A3QIY6QTR is available at Aetrix Electronics and suitable for industrial motor control gateways, portable medical imaging front-ends, and smart building HVAC controllers requiring stable component supply across extended product lifecycles.

Supply support for STM32H7A3QIY6QTR 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 ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The STM32H7 series targets high-end embedded applications demanding real-time performance, rich connectivity, and advanced graphics - with the H7A3 variant specifically optimized for compact, power-efficient designs leveraging SMPS and octo-SPI memory expansion.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7A3QIY6QTR?

The STM32H7A3QIY6QTR operates at up to 280 MHz across an ambient temperature range of −40 to +85 °C and 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 optimal timing performance on compatible pins.

Does STM32H7A3QIY6QTR support hardware encryption or secure boot features?

Yes - it includes Read-Out Protection (ROP), PC-ROP (Program Counter Read-Out Protection), active tamper detection with dedicated pins, and secure firmware upgrade mechanisms. These features enable secure boot chain implementation and protection against physical and logical attacks during field deployment.

Can the STM32H7A3QIY6QTR drive an RGB888 TFT display without external memory?

Yes - its integrated LCD-TFT controller supports up to XGA (1024×768) resolution with RGB888 interface, and the 192 KB TCM RAM (64 KB ITCM + 128 KB DTCM) can serve as frame buffer for smaller displays. For full XGA, external memory via octo-SPI or FMC is recommended to avoid consuming user SRAM.

How many CAN interfaces does STM32H7A3QIY6QTR support, and what protocols are implemented?

The device integrates three CAN controllers: two support CAN FD (up to 5 Mbps data phase), and one implements time-triggered CAN (TT-CAN) compliant with ISO 11898-1:2015. All share common message RAM and filtering logic, enabling synchronized multi-bus diagnostics and control in automotive and industrial networks.