STMicroelectronics announced the release of the  ultra-low-power STM32L5x2 microcontrollers (MCUs) that emphasize security to assure better protected IoT-connected applications.

Operating at clock frequencies to 110MHz, the STM32L5-series MCUs start from the Arm Cortex-M33 32-bit RISC core with Arm TrustZone hardware-based security. Developed for technology such as desktops, mobile devices, and communication infrastructure, trusted computing authenticates devices connected to a network by creating a protected execution environment for cyber-protection and sensitive code (cryptography and key storage) that blocks attempts to corrupt devices or software.

ST allows sensitive workloads to be fully isolated by including, or excluding, I/O. peripheral or area of flash or SRAM from TrustZone protection.

Aditionally, ST has engineered TrustZone to ensure support for secure boot, special read-out and write protection for integrated SRAM and Flash, and cryptographic acceleration, including AES 128/256-bit key hardware acceleration, public key acceleration (PKA), and AES-128 On-The-Fly Decryption (OTFDEC), to protect external code or data. The STM32L5 also supports active tamper detection and secure firmware installation. With this attention to security, the STM32L5 has been certified to PSA Certified Level 2.

The STM32L5x2 MCUs offer 512 Kbyte dual-bank Flash that allows read-while-write operation to aid device management and the Flash ensures a high level of safety by supporting Error Correction Code (ECC) with diagnostics. There is also a 256Kbyte-SRAM and features to support high-speed external memory including single, dual, quad, or octal SPI and Hyperbus Flash or SRAM, and an interface for SRAM, PSRAM, NOR, NAND or FRAM.

Digital peripherals for the STM32L5x2 include USB Full Speed with dedicated supply, allowing customers to keep USB communication even when the system is powered at 1.8V, and a UCPD controller compliant with USB Type-C Rev. 1.2 and USB Power Delivery Rev. 3.0 specifications. Smart analog features include a state-of-the-art analog-to-digital converter (ADC), two power-gated digital-to-analog converters (DAC), two ultra-low-power comparators, and two operational amplifiers with external or internal follower routing and programmable-gain amplifier (PGA) capability.

For more information, visit www.st.com.