MCU series accelerates smart device innovation

The STM32H5 MCU has cutting-edge security provided by STM32Trust TEE Security Manager for smart, connected devices.

The new STM32H5 MCUs contain the embedded core from Arm, the Cortex-M33, which blends high performance with security, energy efficiency, and affordability, to address the mid-range class of MCU-based applications.

It is currently the world’s highest performing Cortex-M33 implementation, running at 250MHz and 375 DMIPS for an EEMBC CoreMark industry-reference score of 1023.

The STM32H5 series has been designed to accelerate innovation at scale for the new generation of smart, connected devices, which provide more intelligence “in the edge” and also strengthens defences against attacks on IoT assets.

The Cortex-M33 core brings Arm’s TrustZone architecture. Building on this, ST adds a range of its own security features, including some developed with ST Authorized Partner, ProvenRun.

STMicroelectronics says that this is the first MCU series to come with system-on-chip (SoC) security services accessed via an industry-standard API.

This facility, called STM32Trust TEE Secure Manager, saves developers writing their own code while providing security services developed according to known best practice.

It simplifies development while ensuring effective protection.

The STM32H5 MCU series is available in several variants, the STM32H503 product line with128KB Flash, allowing 250MHz computing capability in space- and cost-constrained applications.

The STM32H562 and STM32H563 product lines with up to 2MB Flash, rich connectivity, delivering 250MHz over the extended temperature range up to 125°C and the STM32H573 which includes AES cryptographic acceleration and security services.

MCUs challenge the perception that increased performance comes with power dissipation constraints for developers, the new MCUs improve energy efficiency by leveraging ST’s advanced 40nm CMOS process technology and improved on-chip power-conversion circuits. With these MCUs, power dissipation is no longer a constraint when using a 250MHz device in harsh environments where the ambient temperature can reach 125°C.

In addition, STM32H5 MCUs are SIL-ready for products that must meet an appropriate safety integrity level (SIL), thanks to native hardware features that address a wide range of industrial and medical applications.

With its improved power-conversion circuits, the STM32H5 MCUs raise dynamic efficiency to 61µA/MHz in switched mode (SMPS) and 120µA/MHz running off the linear (LDO) converter (at VDD = 3.3V and 25°C) in Run mode with peripherals off.

Consistent with other STM32 MCUs, ST’s advanced peripherals are engineered for maximum efficiency, while precision power management lets developers optimize performance versus power consumption in all operating modes.