STMicroelectronics STM32H7R3I8K6

Overview

STM32H7R3I8K6 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 NeoChrom GPU2D for advanced graphics acceleration - deployed in industrial HMIs, medical imaging front-ends, and real-time motor control gateways.

For engineers reviewing the STM32H7R3I8K6 datasheet, STM32H7R3I8K6 pinout, STM32H7R3I8K6 application, or STM32H7R3I8K6 equivalent, key selection criteria include its 600 MHz M7 core with L1 cache, dual FD-CAN support for automotive diagnostics, integrated JPEG codec for embedded vision preprocessing, and VFQFPN68 package with 68 pins and 0.5 mm pitch.

Technical Context

The STM32H7R3I8K6 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 from flash or external memory. Its memory subsystem includes 64 KB user flash, 620 KB SRAM (with configurable TCM/AXI split), and flexible external interfaces: FMC8/16, octo-SPI, and SDIO.

Security architecture integrates root-of-trust via secure boot entry and HDP, hardware-accelerated public-key verification (ECC only), HASH, TRNG (NIST SP800-90B compliant), and 1 KB OTP. Graphics subsystem combines NeoChrom GPU2D, Chrom-ART DMA2D, and Chrom-GRC (GFXMMU) for optimized 2D rendering and memory bandwidth reduction.

Key Specifications

Pinout & Package

STM32H7R3I8K6 is packaged in VFQFPN68 (10 × 10 mm, 0.5 mm pitch), a thermally enhanced, lead-free, ECOPACK2-compliant package suitable for space-constrained industrial and automotive applications.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H7R3V8T6, the STM32H7R3I8K6 saves 35% PCB area and improves thermal response in sealed enclosures; versus STM32H7R7I8K6, it trades crypto acceleration for lower BOM cost and reduced power in non-security-critical edge nodes.

Availability

STM32H7R3I8K6 is available at Aetrix Electronics and suitable for industrial HMIs, automotive diagnostic gateways, and medical imaging front-ends requiring stable component supply, long-term lifecycle assurance, and ECOPACK2-compliant sourcing.

Supply support for STM32H7R3I8K6 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 silicon.

The STM32H7R series targets cost-optimized high-performance embedded applications, integrating security, graphics, and connectivity features previously found only in premium MCUs - specifically engineered for industrial automation, smart medical devices, and automotive body electronics.

FAQ

What is the maximum operating frequency and supported voltage range for STM32H7R3I8K6?

The STM32H7R3I8K6 operates at up to 600 MHz with a core supply (VCORE) range of 1.05–1.32 V, delivered via internal LDO or SMPS. The I/O voltage range is 1.71–3.6 V, supporting mixed-voltage system interfacing without level shifters. All specifications are validated per DS14360 Rev 6, Section 6.3.1.

Does STM32H7R3I8K6 support hardware-accelerated encryption beyond PKA and HASH?

No - STM32H7R3I8K6 includes only PKA (ECC verification only) and HASH (SHA-1/SHA-224/SHA-256) accelerators. It does not integrate AES, DES, or TRNG-based key derivation engines. For full symmetric crypto acceleration, ST recommends STM32H7R7I8K6 or STM32H7A3xx devices with dedicated crypto co-processors.

Can the NeoChrom GPU2D render directly to external SDRAM without CPU intervention?

Yes - NeoChrom GPU2D supports direct rendering to AXI SRAM or external SDRAM via the FMC or XSPI interfaces. Framebuffer addresses are configured in GPU registers, and rendering commands execute autonomously using DMA channels managed by the HPDMA controller, freeing the Cortex-M7 core for application tasks.

What low-power modes are available, and what peripherals remain active in Stop mode?

STM32H7R3I8K6 supports Sleep, Stop, and Standby modes. In Stop mode, five low-power timers (LPTIM1–5), RTC, backup SRAM, and certain I/Os retain functionality. The 4 MHz CSI oscillator and LSE remain active, enabling wake-up events at sub-microsecond latency. Full peripheral retention details are specified in Section 3.6 of DS14360 Rev 6.