STMicroelectronics — STM32L562 Microcontrollers (MCUs)

STMicroelectronics STM32L562 Microcontrollers (MCUs)

MCU built on Arm TrustZone technology includes multiple hardware cryptographic accelerators

The STM32L562 microcontroller from STMicroelectronics offers a broad range of security capabilities for OEMs to provide better protection for IoT-connected applications.


Operating at clock frequencies up to 110MHz, the STM32L562 is based on the Arm® Cortex®-M33, a security-enhanced processor core which gives MCUs the ability to implement Arm TrustZone® hardware-based security. The TrustZone trusted computing platform creates a protected execution environment for connected products and their sensitive code such as key storage, thus blocking attempts to corrupt devices or software. A second, independent execution environment allows for the running of untrusted code.


An MCU which has TrustZone capability is already a strongly protected device, but ST has added the ability to include or exclude each I/O, peripheral, or area of Flash or SRAM from TrustZone protection. This allows sensitive workloads to be fully isolated for maximum security.


In addition, ST has built on the TrustZone capabilities to add:

  • Support for secure boot
  • Special Read and Write protection for integrated SRAM and Flash memory
  • Cryptographic acceleration, including AES 128-/256-bit key hardware acceleration, public key acceleration and AES-128 on-the-fly decryption to protect external code or data


The MCU also features active tamper detection and secure firmware installation. This comprehensive set of security features and capabilities has enabled ST to gain PSA Certified Level 2 status for the STM32L562.


These security capabilities are combined in the STM32L562 devices with ultra low-power performance to enable the MCUs to deliver high operating speed and long run times, whether powered by coin cells or even through energy harvesting. Low-power techniques deployed in the MCUs include:

  • Adaptive voltage scaling
  • Real-time acceleration
  • Power gating
  • Multiple reduced-power operating modes


  • Energy benchmarks:
    • 370 ULPMark-CP® score
    • 54 ULPMark-PP® score
    • 27,400 SecureMark-TLS® score
  • 512kbytes dual-bank Flash
  • 256kbytes SRAM
  • High-speed external memory interfaces:
    • Single, dual, quad or octal SPI Flash
    • One interface for SRAM, PSRAM, NOR, NAND or FRAM
  • USB 2.0 Full-Speed interface
  • USB Type-C® and USB PD interface
  • Two 12-bit ADCs
  • Two 12-bit DACs
  • Two ultra low-power comparators
  • Two operational amplifiers


  • Consumer devices
  • Industrial equipment
  • Metering
  • Health monitoring
  • Machine monitoring
  • Mobile point-of-sale terminals

Evaluation Kit

Board Part Number: NUCLEO-L552ZE-Q

This STM32 Nucleo-144 development board features an STM32L552ZE MCU, switch-mode power supply, and Arduino, ST Zio and morpho connectivity.

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