STMicroelectronics STM32H7R3I8T6

Overview

STM32H7R3I8T6 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 integrated NeoChrom GPU2D and Chrom-ART DMA2D accelerators. It targets high-performance embedded applications requiring real-time graphics, secure firmware updates, and deterministic low-latency communication - such as industrial HMIs and edge AI inference gateways.

For engineers reviewing the STM32H7R3I8T6 datasheet, STM32H7R3I8T6 pinout, STM32H7R3I8T6 application, or STM32H7R3I8T6 equivalent, key selection considerations include its 600 MHz M7 core with L1 cache, dual FD-CAN support for automotive diagnostics, hardware JPEG codec, and flexible external memory controller supporting HyperRAM™/HyperFlash™ at up to 200 MHz.

Technical Context

This MCU implements a dual-bank Arm Cortex-M7 core with MPU and double-precision FPU, backed by 32+32 KB instruction/data L1 cache enabling zero-wait-state execution. Its memory subsystem includes 64 KB user flash, 64+64 KB TCM RAM for real-time code, 384 KB AXI SRAM, and 4 KB backup SRAM active in lowest-power modes.

The device integrates two independent FD-CAN controllers compliant with ISO 11898-1:2015, supporting bit rates up to 5 Mbps and protocol-level error handling. Its clock system combines internal oscillators (64 MHz HSI, 48 MHz HSI48, 32 kHz LSI) with external crystal support (4–50 MHz HSE, 32.768 kHz LSE) and multiple PLLs for precise domain-specific frequency synthesis.

Key Specifications

Pinout & Package

STM32H7R3I8T6 is packaged in LQFP176 (24 × 24 mm), a thermally robust, leaded surface-mount package suitable for industrial reflow and manual inspection. Pin count and layout align with ST's H7R series footprint compatibility across LQFP100/144/176 variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H753VI and STM32H743VI, the STM32H7R3I8T6 trades raw memory capacity for integrated power management (SMPS), USB-C PD control (UCPD), hardware JPEG, and enhanced security services - making it optimal for compact, battery-aware, and graphics-intensive edge devices.

Availability

STM32H7R3I8T6 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 through 2028 and beyond.

Supply support for STM32H7R3I8T6 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-grade components since 1987.

The STM32H7R series is engineered for cost-sensitive, high-performance embedded systems demanding graphics acceleration, functional safety readiness, and hardware-enforced security - targeting industrial automation, automotive telematics, and smart infrastructure.

FAQ

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

The STM32H7R3I8T6 operates at up to 600 MHz using its Arm Cortex-M7 core with integrated L1 instruction and data caches (32+32 KB). This frequency is sustained via zero-wait-state execution from embedded flash, enabled by the cache and adaptive real-time prefetch. The SMPS regulator supplies VCORE at optimal voltage, and external 50 MHz HSE with PLL multiplication ensures stable clock synthesis.

Does this MCU support hardware encryption for secure boot?

Yes. The STM32H7R3I8T6 implements a secure boot chain anchored in a unique boot entry and secure hide protection area (HDP). It includes embedded root secure services (RSS) for secure firmware installation/update (SFI/SFU), public key accelerator (PKA) for ECC verification, HASH hardware accelerator, and NIST SP800-90B-compliant true random number generator - all required for certified secure boot implementations.

Can the JPEG codec handle both encoding and decoding?

Yes. The hardware JPEG codec supports full encode and decode acceleration for YUV420, YUV422, YUV444, and RGB formats. It operates independently of the CPU, accepting input from memory or DCMIPP and writing output directly to SRAM or external memory - enabling real-time camera preview, UI image decompression, and compressed firmware image validation.

What are the key differences between STM32H7R3I8T6 and STM32H743VI?

The STM32H7R3I8T6 adds integrated SMPS, USB Type-C power delivery controller (UCPD), hardware JPEG codec, digital camera interface (DCMIPP), and enhanced security accelerators (SFI/SFU, HDP, RSS) absent in the H743VI. It also features smaller flash/RAM (64 KB/620 KB vs. 2 MB/1 MB) and targets cost-optimized, power-conscious, graphics- and security-intensive applications rather than general-purpose high-memory control.