STMicroelectronics STM32H7S3V8H6

Overview

STM32H7S3V8H6 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 interfaces, Ethernet MAC, and hardware-accelerated graphics (NeoChrom GPU2D + Chrom-ART DMA2D). It targets high-performance embedded applications requiring real-time control, secure firmware updates, and rich multimedia display-such as industrial HMIs and connected edge gateways.

For engineers reviewing the STM32H7S3V8H6 datasheet, STM32H7S3V8H6 pinout, STM32H7S3V8H6 application, or STM32H7S3V8H6 equivalent, key selection considerations include its dual FD-CAN support for automotive diagnostics, on-the-fly external memory encryption (MCE), PSA Level 2/SESIP Level 3 security certification status, and VFQFPN68 package with 68-pin LQFP-compatible footprint.

Technical Context

This MCU integrates a dual-bank Arm Cortex-M7 core with 32+32 KB L1 instruction/data cache, enabling zero-wait-state execution from flash or external memory. Its memory subsystem includes 64 KB user flash, 620 KB SRAM (split into TCM, AXI, and backup regions), and flexible external memory controllers supporting SDR/LPSDR SDRAM, NOR/NAND, and octo-SPI HyperRAM™/HyperFlash™ at up to 200 MHz.

The device implements advanced security via embedded Root Secure Services (RSS), hardware unique key (HUK), two DPA-resistant AES coprocessors, public key accelerator (PKA), and secure boot with certificate-based debug authentication. Graphics acceleration combines NeoChrom GPU2D (rotation/scaling), Chrom-ART DMA2D (2D composition), and Chrom-GRC (GFXMMU) for up to 20% resource optimization.

Key Specifications

Pinout & Package

VFQFPN68 is a 10 × 10 mm, 0.5 mm pitch quad flat no-lead package with exposed thermal pad. It provides 68 I/O terminals in compact footprint suitable for space-constrained industrial and portable designs.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7S3V8H6, the STM32H7S3V8H6TR offers identical functionality in tape-and-reel form for automated manufacturing, while STM32H7S7V8H6 extends memory and cryptographic capabilities-making it suitable for larger OTA images and full asymmetric key lifecycle management.

Availability

STM32H7S3V8H6 is available at Aetrix Electronics and suitable for industrial HMIs, automotive diagnostic gateways, edge AI vision nodes, and secure industrial gateways requiring stable component supply across multi-year production cycles.

Supply support for STM32H7S3V8H6 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 devices for industrial, automotive, and consumer markets.

The STM32H7S series targets high-performance, secure, and graphics-rich embedded applications-specifically engineered for industrial HMIs, automotive gateways, and edge AI endpoints demanding real-time responsiveness and certified security.

FAQ

What is the maximum operating frequency and core architecture of the STM32H7S3V8H6?

The STM32H7S3V8H6 features an Arm Cortex-M7 core with double-precision FPU, operating at up to 600 MHz. It includes 32+32 KB L1 instruction and data caches, enabling zero-wait-state execution from flash or external memory. The core supports TrustZone for Armv8-M, though this specific part implements ST's proprietary secure boot and debug authentication instead of standard TrustZone.

Does the STM32H7S3V8H6 support external SDRAM, and what interfaces are available for that purpose?

Yes, the STM32H7S3V8H6 supports external SDR/LPSDR SDRAM via its Flexible Memory Controller (FMC) with up to 32-bit data bus width. It also supports octo-SPI interfaces capable of XiP (execute-in-place) from HyperRAM™ at up to 200 MHz. Both interfaces are independently configurable and can operate concurrently with distinct timing parameters defined in the device's memory mapping registers.

How does the security architecture of the STM32H7S3V8H6 meet industry certification requirements?

The STM32H7S3V8H6 is certified to PSA Level 2 and SESIP Level 3 (under certification). It implements a hardware root of trust via unique boot entry, secure hide protection area (HDP), and embedded Root Secure Services (RSS). Secure firmware installation (SFI) and update (SFU) are enabled through hardware-accelerated AES and PKA engines, with keys protected by the hardware unique key (HUK) and 1 KB OTP.

What graphics acceleration capabilities are integrated, and how do they reduce CPU load in display applications?

The STM32H7S3V8H6 integrates NeoChrom GPU2D (for rotation, scaling, perspective-correct texture mapping), Chrom-ART Accelerator (DMA2D) for 2D composition, and Chrom-GRC (GFXMMU) for optimized framebuffer memory usage. These units operate independently of the CPU-DMA2D can blend layers or convert color formats without Cortex-M7 intervention, reducing CPU utilization by up to 40% in typical HMI rendering workloads.