STMicroelectronics STM32H7R3L8H6

Overview

STM32H7R3L8H6 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 JPEG codec. It integrates NeoChrom GPU2D and Chrom-ART DMA2D accelerators for real-time graphics in industrial HMI and embedded vision systems.

For engineers reviewing the STM32H7R3L8H6 datasheet, STM32H7R3L8H6 pinout, STM32H7R3L8H6 application, or STM32H7R3L8H6 equivalent, key selection criteria include FD-CAN timing compliance, TCM RAM allocation for deterministic code execution, LQFP176 package thermal performance, and secure boot configuration via HDP and RSS services.

Technical Context

The STM32H7R3L8H6 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 memory. Its bus-interconnect matrix supports concurrent AXI/AHB/APB access with priority arbitration across 2x DMA controllers and GPDMA/HPDMA channels.

Security architecture includes certificate-based debug authentication, secure hide protection area (HDP), embedded root secure services (RSS) for SFI/SFU, and dedicated PKA for ECC verification - all enforced by a flexible life-cycle scheme with OTP and tamper detection.

Key Specifications

Pinout & Package

LQFP176 (24 × 24 mm) package with 152 general-purpose I/Os, 3.3 V tolerant, supporting multiple alternate functions per pin including FMC, XSPI, SDMMC, DCMIPP, and PSSI interfaces.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7R3L8H6, the V8 variant trades I/O count and parallel interface support for smaller footprint, while the R7 variant replaces graphics acceleration with hardened crypto engines - making each optimal for distinct security vs. UI workload priorities.

Availability

STM32H7R3L8H6 is available at Aetrix Electronics and suitable for industrial HMI, embedded vision gateways, secure industrial networking, and automotive diagnostic tools requiring stable component supply through June 2026.

Supply support for STM32H7R3L8H6 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 products for industrial, automotive, and consumer markets.

The STM32H7R series targets cost-sensitive high-performance embedded applications requiring security, graphics, and connectivity - delivering M7-class compute with simplified licensing and streamlined certification paths.

FAQ

What is the maximum operating frequency and how is it achieved?

The STM32H7R3L8H6 achieves 600 MHz via its Arm Cortex-M7 core with 32+32 KB L1 cache, allowing zero-wait-state execution from embedded flash or external memory. This requires proper VCAP decoupling (2.2 µF), stable 1.71–3.6 V supply, and correct clock tree configuration using PLL1 with HSE or HSI source. Thermal derating begins above 85°C ambient.

Does this MCU support secure boot and firmware updates out of the box?

Yes - secure boot is enforced by a unique entry point and secure hide protection area (HDP), while firmware updates use embedded root secure services (RSS) with public key accelerator (PKA) for ECC signature verification. The 1 KB OTP stores keys, and the 96-bit UID enables device-specific attestation.

Which graphics interfaces does the STM32H7R3L8H6 support for display output?

It supports LCD-TFT up to XGA (1024×768) resolution via the LTDC controller, parallel display through FMC8/16, and serial interfaces including octo-SPI for HyperRAM™/HyperFlash™. The NeoChrom GPU2D and Chrom-ART DMA2D accelerate rendering, while Chrom-GRC optimizes memory bandwidth usage by up to 20%.

How many FD-CAN interfaces are integrated and what protocol versions do they support?

The STM32H7R3L8H6 integrates two fully independent FD-CAN controllers compliant with ISO 11898-1:2015. Each supports classical CAN (1 Mbps) and CAN FD (up to 5 Mbps data phase), with configurable bit timing, TX/RX FIFOs, and time-triggered communication mode for deterministic scheduling in automotive and industrial networks.