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STMicroelectronics Unveils Extreme Low-Power ARM Microcontrollers with Advanced Performance and Cybersecurity, evaluation board and samples available from Anglia

STMicroelectronics has announced the STM32U5xx series, it’s latest generation of extreme power-saving microcontrollers (MCUs) designed to meet the most demanding power/performance requirements for smart applications.

STMicroelectronics industry-leading STM32 MCUs, built upon the highly energy-efficient Arm® Cortex®-M processors, are already in billions of domestic appliances, industrial controls, computer peripherals, communication devices, and equipment managing smart cities and infrastructure. The STM32U5 series teams the efficient Arm Cortex-M33 core with STMicroelectronics innovative proprietary power-saving features and on-chip IP cutting down energy demand while increasing performance. The line also adds new state-of-the-art features needed by today’s applications, including advanced cybersecurity with new hardware-based protection targeting PSA and SESIP (Security Evaluation Standard for IoT Platforms) assurance level 3, as well as graphics accelerators for rich user experiences.

Power-Saving Features

The STM32U5 series MCUs introduce an innovative autonomous mode that lets direct memory access (DMA) and peripherals keep working while most of the device sleeps, to save power. Granular control over operating modes allows part of the MCU’s memory to be turned off, to avoid powering unused cells. In addition, STM32U5 MCUs are manufactured using 40nm process geometry, the most advanced node suitable for MCUs, which saves power in dynamic operating modes as well as power-saving modes. There are also proven features from the preceding STM32L0, STM32L4, and STM32L5 ultra-low-power MCUs. These include dynamic voltage scaling, which optimizes energy consumption according to the workload, and the ST ART Accelerator™ to read Flash memory efficiently. An update to the ST ART Accelerator now allows reading of off-chip Flash as well as the MCU’s internal memory. By Integrating an advanced DC/DC converter and low-dropout (LDO) regulator, connected in parallel and selectable on-the-fly, STM32U5 MCUs can cut dynamic power consumption to less than 19µA/MHz.

Performance comparison with other STM32 families

Free Samples and Evaluation Board   
Key Features
  • Featuring STMicroelectronics state-of-the-art patented technology
  • Arm® 32-bit Cortex®-M33 CPU with TrustZone®, MPU, DSP, and FPU
  • Ultra-low-power with FlexPowerControl
  • Low-power background autonomous mode (LPBAM)
  • Embedded regulator (LDO) and SMPSstep-down converter supporting switchon-the-fly and voltage scaling
  • 1 or 2-Mbyte Flash memory with ECC, 2 banks read-while-write, including 512 Kbytes with 100 kcycles
  • 786-Kbyte SRAM with ECC OFF or 722-Kbyte SRAM including up to 322-Kbyte SRAM with ECC ON
  • External memory interface supporting SRAM, PSRAM, NOR, NAND and FRAM memories
  • 2 Octo-SPI memory interfaces
  • Security and cryptography: PSA level 3 and SESIP level 3 certified (STM32U585)
  • Multiple internal clocks
  • Wide range of general-purpose input/outputs
  • 1 USB Type-C®/USB power delivery controller
  • 1 USB OTG 2.0 full-speed controller
  • 2 SAIs (serial-audio interface)
  • 4 I2C FM+(1 Mbit/s), SMBus/PMBus™
  • 6 USARTs (ISO 7816, LIN, IrDA, modem)
  • 3 SPIs (5x SPIs with the dual OCTOSPI)
  • 1 CAN FD controller
  • 2 SDMMC interfaces
  • 1 multi-function digital filter (6 filters)+ 1 audio digital filter with sound-activity detection
  • Parallel synchronous slave interface
  • 16- and 4-channel DMA controllers, functional in Stop mode
  • Graphics: Chrom-ART Accelerator (DMA2D) and digital camera interface
  • Mathematical co-processor
  • Capacitive sensing channels supporting touch key, linear and rotary touch sensors
  • Range of Rich analog peripherals (independent supply)
  • Development support: serial-wire debug (SWD), JTAG, Embedded Trace Macrocell™ (ETM)
  • Power supply: 1.71 V to 3.6 V
  • Temperature range: –40 °C to +85/125 °C
Data

Upgraded Peripherals

In addition to saving power, designers can tackle demanding applications leveraging new features such as greater Flash density, now with up to 2MB on chip and fast interfaces to off-chip memory for further expansion. Up to 0.5MB of on-chip Flash has increased cycle life, up to 100,000 read/write cycles to assure reliable storage of user data. An advanced high-speed 14-bit analog-to-digital converter (ADC) is provided, ready for next-generation sensing and tracking applications whilst a Multi-function Digital Filter (MDF) and Audio Digital Filter (ADF) upgrade the capabilities of STMicroelectronics proven Digital Filter for Sigma-Delta Modulator (DFSDM). By boosting performance in sound-activity detection, these now enable users to infuse AI into low-cost, low-power microcontroller-based use cases. Moreover, with Error Correction Code (ECC) memory as part of the device’s RAM, STM32U5 MCUs can also fulfil safety-centric applications.

Enhanced Cybersecurity

Building on the cybersecurity focus of the STM32L5, which includes a Cortex-M33 core with Arm TrustZone® technology and an STMicroelectronics specific security feature set, the STM32U5 series introduces new and state-of-the-art innovations including AES encryption and Public Key Authorization (PKA) which are now hardware resistant to side-channel attacks by Differential Power Analysis (DPA). Secure data storage with a Hardware Unique Key (HUK), Active tamper detection and Internal monitoring that can erase secret data in the event of perturbation attacks to help meet the PCI Security Standards Council (PCI SSC) requirements for Point Of Sales (POS) applications.

Functional Block Diagram (STM32U585)

The STM32U5 MCUs are available in a broad choice of packages including a 4.2mm x 3.95mm WLCSP and 7mm x 7mm UQFN48 and UFBGA169 in pin counts from 48 to 169.

Design Support

To support developers, STMicroelectronics has created the STM32U5 IoT Discovery Kit (B-U585I-IOT02A) that combines the MCU with a Wi-Fi® module, Bluetooth® module, and various sensors. The Discovery kit provides a complete demonstration and development platform for the STM32U585AI microcontroller

This Discovery kit enables a wide diversity of applications by exploiting low-power communication, multiway sensing, and direct connection to cloud servers. It includes Wi-Fi® and Bluetooth® modules, as well as microphones, temperature and humidity, magnetometer, accelerometer and gyroscope, pressure, time-of-flight, and gesture-detection sensors.
The support for ARDUINO® Uno V3, STMod+ and Pmod™ connectivity provides unlimited expansion capabilities with a large choice of specialized add-on boards. For even more user-friendliness, the on-board STLINK-V3E debugger provides out-of-the-box loading and debugging capabilities, as well as a USB Virtual COM port bridge.

This kit has been chosen as reference board for the new Microsoft Azure Certified Device program, the STM32U5 provides an excellent platform for delivering Azure IoT services via Azure RTOS leveraging the advanced features of the microcontroller.
Azure RTOS will be integrated in the STM32Cube software suite, with configuration features in STM32CubeMX and STM32CubeIDE tools and addition of examples, bringing additional key benefits to STM32Cube such as fast performance and industry certifications.

Click below for an overview of the STM32U5 IoT node B-U585I-IOT02A Discovery Kit

 

By exploiting low-power communication, multiway sensing and direct connection to cloud servers, the STM32U5 MCUs are suitable for a wide diversity of applications including wearables, personal medical devices, energy metering, home automation and industrial sensors.

Anglia are offering customers a FREE Discovery kit and samples of the STM32U5 series extreme low power microcontrollers from STMicroelectronics, please fill in the form below to register for an evaluation board and samples now.

To register for a FREE Discovery kit and samples of the STM32U5 series extreme low power microcontrollers from STMicroelectronics, please fill in the form below

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FREE samples for UK and Ireland customers only, subject to availability.

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