STMicroelectronics STM32H573IIK3Q

Overview

STM32H573IIK3Q from STMicroelectronics is a high-security, high-performance Arm® Cortex®-M33 32-bit microcontroller with TrustZone®, FPU, and cryptographic accelerators. It operates at up to 250 MHz (375 DMIPS), integrates 2 Mbyte flash with ECC and 640 Kbyte SRAM (including ECC-protected SRAM2/SRAM3), and supports on-the-fly Octo-SPI decryption for secure boot in industrial edge gateways.

For engineers reviewing the STM32H573IIK3Q datasheet, STM32H573IIK3Q pinout, STM32H573IIK3Q application, or STM32H573IIK3Q equivalent, key selection criteria include TrustZone-enforced peripheral isolation, dual DMA controllers for real-time offload, PSA Level 3/SESIP3 security certification, and support for USB Type-C® Power Delivery with UCPD controller - critical for secure IoT node design and firmware upgrade integrity.

Technical Context

The STM32H573IIK3Q implements Armv8-M mainline security with configurable SAU regions and preconfigured immutable root of trust (ST-iROT), enabling hardware-enforced secure boot and runtime isolation between secure/non-secure firmware partitions. Its GTZC (Global TrustZone Controller) governs memory and peripheral access rights across all TrustZone-aware peripherals including AES, PKA, OTFDEC, and SAI.

It integrates dual cache subsystems: an 8-Kbyte instruction cache (ICACHE) enabling zero-wait-state execution from flash or external memories, and a 4-Kbyte data cache (DCACHE) optimized for external memory bandwidth. The ART Accelerator and dual GPDMA controllers jointly reduce CPU load during high-throughput operations such as encrypted sensor data streaming via FDCAN or HDMI-CEC command relay.

Key Specifications

Pinout & Package

STM32H573IIK3Q is housed in a UFBGA176+25 package (10 × 10 mm, 201-ball layout) with 140 fast I/Os (most 5 V-tolerant), ten I/Os supporting independent supply down to 1.08 V, and dedicated pins for TrustZone-secured debug (SWD/JTAG), VBAT RTC backup, and tamper detection.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STM32H573IIK3Q, STM32H753VI lacks hardware-enforced security primitives and certification, while i.MX RT1176 shifts security responsibility to an external chip - making STM32H573IIK3Q the only single-die solution meeting PSA Level 3 and SESIP3 out-of-box for compact, certified edge nodes.

Availability

STM32H573IIK3Q is available at Aetrix Electronics and suitable for industrial edge gateways, secure medical data loggers, USB Type-C Power Delivery hubs, and smart building controllers requiring stable component supply and long-term lifecycle support.

Supply support for STM32H573IIK3Q 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, specializing in microcontrollers, power management, sensors, and automotive ICs.

The STM32H5 series is designed specifically for high-assurance embedded applications demanding PSA-certified security, cryptographic acceleration, and robust real-time performance - targeting industrial, medical, and infrastructure markets where firmware integrity is non-negotiable.

FAQ

What security certifications does STM32H573IIK3Q hold?

STM32H573IIK3Q is certified to PSA Certified Level 3 and SESIP3 (Security Evaluation Standard for IoT Platforms) assurance targets. These validate its hardware-enforced TrustZone implementation, secure boot chain, cryptographic accelerators, and life cycle management - meeting requirements for payment terminals, medical edge devices, and government-grade secure firmware deployment.

Does STM32H573IIK3Q support external memory interfaces?

Yes - it includes a Flexible Memory Controller (FMC) supporting SRAM, PSRAM, SDRAM/LPSDR, FRAM, and NOR/NAND memories with up to 16-bit data bus width, plus one Octo-SPI interface with on-the-fly decryption for serial PSRAM/NOR/hyperflash. This enables secure expansion of code and data space beyond internal 2 Mbyte flash and 640 Kbyte SRAM.

What is the role of the UCPD peripheral in STM32H573IIK3Q?

The USB Type-C® Power Delivery (UCPD) peripheral implements the physical layer and protocol engine for USB-C power negotiation, policy enforcement, and firmware updates. It integrates hardware CRC, secure message signing via PKA/HUK, and tamper-resistant key storage - enabling certified, authenticated PD communication without external PD controllers.

How does the dual-cache ART Accelerator improve real-time performance?

The 8-Kbyte instruction cache (ICACHE) eliminates flash wait states during code execution, while the 4-Kbyte data cache (DCACHE) accelerates external memory access for large buffers (e.g., camera frames, encrypted payloads). Together with dual GPDMA controllers, they reduce CPU load by up to 40% in sustained data-transfer scenarios like FDCAN-to-Ethernet bridging or SAI audio streaming.