STMicroelectronics STM32H7S3A8I6

Overview

STM32H7S3A8I6 from STMicroelectronics is an Arm® Cortex®-M7 32-bit microcontroller operating at up to 600 MHz, featuring 64 KB flash, 620 KB SRAM (548 KB with ECC), dual FD-CAN, Ethernet MAC, and hardware-accelerated graphics (NeoChrom GPU2D + Chrom-ART DMA2D) for embedded HMI applications. It integrates two 12-bit ADCs (5 MSPS), USB OTG HS/FS, and PSA Level 2 / SESIP Level 3 security certification.

For engineers reviewing the STM32H7S3A8I6 datasheet, STM32H7S3A8I6 pinout, STM32H7S3A8I6 application, or STM32H7S3A8I6 equivalent, key selection considerations include its LQFP176 package, dual FD-CAN support for automotive diagnostics, on-the-fly external memory encryption, and dedicated JPEG codec for real-time image processing in resource-constrained edge devices.

Technical Context

The STM32H7S3A8I6 implements a dual-bank Arm Cortex-M7 core with 32+32 KB L1 instruction/data cache, enabling zero-wait-state execution from flash or external memories. Its bus-interconnect matrix supports concurrent AXI/AHB/APB access, while dual GPDMA controllers offload CPU-intensive data movement across peripherals including FMC, XSPI, and SDMMC.

Security architecture includes a root-of-trust boot entry, secure hide protection area (HDP), embedded root secure services (RSS) for SFI/SFU, and two DPA-resistant AES coprocessors - one supporting on-the-fly encryption of serial/parallel external memories (e.g., HyperRAM™, SDRAM). The NeoChrom GPU2D handles rotation/scaling with perspective-correct texture mapping, decoupled from CPU load.

Key Specifications

Pinout & Package

LQFP176 (24 × 24 mm, 0.5 mm pitch) package with exposed thermal pad; 152 I/Os with interrupt capability, multiple alternate functions per pin, and dedicated voltage domains (VDDA, VREF+, VCAP).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-performance secure MCU applications.

Compared with STM32H743VI and STM32H753II, the STM32H7S3A8I6 uniquely balances FD-CAN, JPEG, and PSA-certified security in a compact LQFP176 package - making it optimal for cost-sensitive, graphics-enabled automotive and industrial edge devices requiring field-upgradable firmware and tamper resilience.

Availability

STM32H7S3A8I6 is available at Aetrix Electronics and suitable for automotive diagnostics tools, industrial HMI panels, smart audio endpoints, and secure edge gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H7S3A8I6 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 STM32H7S series targets secure, graphics-rich edge applications - combining high-performance Cortex-M7 execution, hardware-accelerated 2D graphics, and PSA-certified security in scalable packages for cost-sensitive HMI and automotive diagnostic use cases.

FAQ

What is the maximum operating frequency and core configuration of the STM32H7S3A8I6?

The STM32H7S3A8I6 features a single Arm Cortex-M7 core rated for up to 600 MHz operation, with integrated double-precision floating-point unit (DP-FPU), memory protection unit (MPU), and 32+32 KB L1 instruction/data cache. It does not implement dual-core or symmetric multiprocessing - all performance derives from this single high-frequency core with hardware accelerators (CORDIC, JPEG, GPU2D) offloading specific workloads.

Does the STM32H7S3A8I6 support external SDRAM, and what interfaces are available for that purpose?

Yes, the STM32H7S3A8I6 supports external SDR/LPSDR SDRAM via its Flexible Memory Controller (FMC) with up to 32-bit data bus width and configurable timing parameters. It also supports octo-SPI and hexa-SPI interfaces capable of XiP from serial PSRAM or HyperRAM™ - but SDRAM requires the parallel FMC interface, not SPI-based memory controllers.

How is security implemented on the STM32H7S3A8I6, and what certifications does it hold?

The STM32H7S3A8I6 implements hardware-enforced security including PSA Level 2 and SESIP Level 3 certification (under certification), secure boot with unique entry point, hardware unique key (HUK), 1 KB OTP, active tamper detection, and memory cipher engine (MCE) for on-the-fly encryption of external memories. It supports secure firmware installation/update (SFI/SFU) via embedded root secure services (RSS) and includes DPA-resistant AES and PKA accelerators.

What graphics capabilities does the STM32H7S3A8I6 provide, and which display interfaces does it support?

The STM32H7S3A8I6 integrates NeoChrom GPU2D for rotation, scaling, and perspective-correct texture mapping; Chrom-ART Accelerator (DMA2D) for 2D graphic composition; and Chrom-GRC (GFXMMU) for 20% graphic resource optimization. It supports LCD-TFT up to XGA (1024×768) via LTDC, parallel display interfaces through FMC8/16, and digital camera input via DCMIPP with pixel format conversion and cropping.