STMicroelectronics STM32H573IIK6

Overview

STM32H573IIK6 from STMicroelectronics is a production-grade Arm® Cortex®-M33 32-bit microcontroller with TrustZone® security, 250 MHz max clock, 2-Mbyte ECC flash, 640-Kbyte SRAM, and integrated cryptographic accelerators (AES, PKA, HASH, RNG). It serves as a secure application processor in industrial gateways requiring real-time control, encrypted firmware updates, and multi-interface connectivity.

For engineers reviewing the STM32H573IIK6 datasheet, STM32H573IIK6 pinout, STM32H573IIK6 application, or STM32H573IIK6 equivalent, key selection criteria include TrustZone-enforced peripheral isolation, dual DMA controllers for offloading, on-the-fly Octo-SPI decryption, CORDIC/FMAC math acceleration, and support for PSA Level 3/SESIP3-certified secure boot.

Technical Context

The device implements Armv8-M mainline security with configurable SAU regions and ST-iROT immutable root of trust, enabling hardware-enforced separation of secure/non-secure firmware execution. Its dual-cache ART Accelerator includes 8-Kbyte instruction cache and 4-Kbyte data cache to sustain zero-wait-state execution from flash and external memories.

Security architecture integrates preconfigured secure debug authentication, tamper detection, hardware unique key (HUK), and two AES coprocessors-one DPA-resistant-alongside a NIST SP800-90B-compliant true random number generator and public key accelerator for asymmetric cryptography.

Key Specifications

Pinout & Package

UFBGA176+25 package features a 10 × 10 mm body with 201 solder balls arranged in 15 × 15 grid plus 25 additional balls for power/ground distribution. Ball pitch is 0.65 mm. Thermal pad exposed on underside improves thermal dissipation under high-CPU-load operation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar secure microcontroller applications.

Compared with STM32H573IIK6, the STM32H753IIK6 trades hardware-enforced security for raw compute throughput, while the i.MX RT1176 emphasizes heterogeneous processing over cryptographic assurance-making the H573 uniquely fit for PSA-certified, resource-constrained secure gateways.

Availability

STM32H573IIK6 is available at Aetrix Electronics and suitable for industrial PLC controllers, secure edge gateways, medical diagnostic devices, and smart energy meters requiring stable component supply across extended product lifecycles.

Supply support for STM32H573IIK6 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 semiconductors.

The STM32H5 series targets high-assurance embedded systems demanding PSA Level 3/SESIP3 certification, combining Arm TrustZone with ST's proprietary secure boot and runtime protection technologies for industrial, medical, and infrastructure applications.

FAQ

What is the maximum operating frequency and associated performance metric?

The STM32H573IIK6 operates at up to 250 MHz, delivering 375 DMIPS (Dhrystone 2.1) and 1023 CoreMark® (4.092 CoreMark®/MHz). This performance is sustained via the 8-Kbyte instruction cache and ART Accelerator, enabling zero-wait-state execution from embedded flash memory under real-world code patterns.

How does the TrustZone implementation differ from standard Cortex-M33 deployments?

This device integrates ST's Global TrustZone Controller (GTZC) with eight configurable SAU regions, preconfigured immutable root of trust (ST-iROT), and TrustZone-aware peripherals including OTFDEC, SAES, and PKA. Unlike generic Cortex-M33 implementations, it ships with factory-provisioned secure debug authentication and tamper-detection circuitry aligned to PSA Level 3 assurance requirements.

Which external memory interfaces support hardware-accelerated decryption?

Only the Octo-SPI interface supports on-the-fly hardware decryption via the OTFDEC engine. It decrypts serial NOR/PSRAM/NAND flash contents during read operations using AES-128/256 keys stored in secure memory, eliminating software decryption overhead and preventing plaintext exposure in SRAM.

What are the power supply requirements for VDDIO2 and its design significance?

VDDIO2 accepts 1.08–3.6 V and powers up to ten I/Os independently, enabling direct interfacing with legacy 1.8 V or 2.5 V peripherals without level shifters. This reduces BOM cost and PCB area in mixed-voltage systems such as industrial sensors with 1.8 V SPI slaves or automotive diagnostics modules.