STMicroelectronics STM32U3 ultra-low-power Arm Cortex-M33 32-bit microcontroller with integrated TrustZone and floating-point unit (FPU) that can operate at frequencies up to 96MHz. Single-channel precision FPUs support all Arm single-channel precision data processing instructions and data types. The Cortex-M33 core also enables a complete digital signal processing (DSP) instruction set and memory protection unit (MPU) for improved application security. STM32U3 device is based on near-threshold voltage technology that reduces active power consumption to 10 μA/Mhz, significantly extending battery life for a wide range of applications. ®®®

The device embeds speed memory (1MB flash memory and 256-Kbytes SRAM), an Octo/Quad-SPI flash interface, enhanced I/O, peripherals connected to three APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix. STM32U3 MCUs integrate embedded flash memory and SRAM protection mechanisms. The devices also offer two 12-bit ADCs (2.5Msps), two comparators, two op-amps, two DAC channels, an internal voltage reference buffer, a low-power RTC, three general-purpose 32-bit timers, a 16-bit PWM timer dedicated to motor control, three general-purpose 16-bit timers, two basic 16-bit timers, and up to four 16-bit low-power timers.

STM32U3 device embeds a low-power digital filter dedicated to audio signals (ADF), one of which supports sound activity detection. Additional features include up to 21 capacitive sensing channels, standard/advanced communication interfaces, and multiple peripherals. STMicroelectronics STM32U3 MCUs provide a high degree of protection against transient attacks and other attacks.

characteristic

  • Includes ST patented technology
  • Ultra-low power consumption:
    • Supply range: 1.71 V to 3.6 V
    • Temperature range: -40 °C to +105 °C
    • VBEATS Mode: Powers RTC, 32x 32-bit backup registers
    • 1.6μA停止3模式,配有8-Kbyte SRAM
    • 2.2μA stop 3-mode with full SRAM
    • 3.8μA停止2模式,配有8-Kbyte SRAM
    • 4.5μA stop 2-mode with full SRAM
    • 9.5μA/Mhz at 3.3V [While(1) SMPS Buck Converter Mode]
    • 13μA/MHz at 3.3V/48MHz (CoreMark SMPS Buck Converter Mode)®
    • 16μA/Mhz at 3.3V/96MHz (CoreMark SMPS Buck Converter Mode)
    • Power-Down Reset (BOR) in all modes except Off mode
  • Arm 32位Cortex-M33 CPU，带TrustZone和FPU
  • The ART accelerator is equipped with an 8KB instruction cache that enables zero waiting execution from flash memory and external memory, with up to 96MHz operating frequency, MPU, 144DMIPS performance, and DSP instructions
  • Power Management - Embedded voltage regulators (LDOs) and SMPS buck converters for dynamic switching and voltage regulation
  • benchmark
    • 1.5DMIPS/MHz（Dhrystone 2.1）
    • 387 CoreMark（4.09 CoreMark/MHz）
    • 500 ULPMark™-CP
    • 117 ULPMark-CM
    • 202000 SecureMark™-TLS
  • memorizer
    • Up to 1MB (STM32U375) or 1MB (STM32U385) of flash memory, supports ECC and dual-zone simultaneous read/write
    • 256KB SRAM, of which 64KB supports hardware parity
    • OCTOSPI external memory interface that supports SRAM, PSRAM, NOR, NAND, and FRAM memory
  • security
    • Arm TrustZone and secure I/O, memory, and peripherals
    • Flexible lifecycle scheme with RDP and password protection debugging
    • Achieve a root of trust with a unique boot entry and secure hidden protection zone (HDP).
    • Secure Firmware Installation (SFI) via Embedded Root Security Service (RSS)
    • Secure firmware upgrades
    • Support for Cortex M Trusted Firmware (TF-M)
    • Public Key Accelerator, ECDSA Signature Verification
    • Critical hardware protection
    • Proof key
    • HASH hardware accelerator
    • True random number generator that meets NIST SP800-90B standards
    • 96-bit unique identifier
    • 512 bytes one-time programmable (OTP)
    • Tamper Protection
  • Clock management
    • 4MHz to 50MHz crystal oscillator
    • 32.768kHz crystal oscillator for RTC (LSE).
    • Internal 16 MHz Factory Calibrated RC (±1%)
    • Internal low-power RC at 32kHz or 250Hz (±5%)
    • 2 internal multi-speed 3MHz to 96MHz oscillators
    • Built-in 48MHz clock recovery
    • High-precision MSI is possible in PLL mode and supports 32.768kHz, 16MHz, or 32MHz crystal oscillators up to 96MHz
  • Universal Input/Output - Up to 82 fast I/Os with interrupt function, most can withstand 5V voltage, and up to 14 I/Os with independent power supplies supporting voltages as low as 1.08V
  • Up to 15 timers and 2 guard dogs
    • 1 x 16-bit advanced motor control timer, 3 x 32-bit and 3 x 16-bit general purpose timers, 2 x 16-bit basic timers, 4 x low-power 16-bit timers (available in stop mode), 2 watchdog timers, and 2 x SysTick timers
    • RTC with hardware calendar, alarm clock and calibration functions
  • Up to 19 communication peripherals
    • 1 x USB 2.0 full-speed controller
    • 1 Serial Audio Interface (SAI)
    • 3 I's2C FM+ (1Mb/s)、SMBus/PMBus™
    • 2 x I3C (SDR) with support for I2C FM+ mode
    • 2 USARTs and 2 UARTs (SPI, ISO 7816, LIN, IrDA, modem), 1 LPUART
    • 3 SPIs (6 SPI interfaces if 1 OCTOSPI and 2 USARTs are included)
    • 1 x CAN FD controller
    • 1 x SDMMC interface
    • 1 audio digital filter with sound activity detection
  • 12-channel GPDMA controller for sleep and stop mode (up to Stop 2)
  • Up to 21 capacitive sensing channels with support for touch key, linear, and rotary touch sensors
  • Extensive analog peripherals (independent power supply)
    • Two 12-bit ADCs with a sampling rate of 2.5Msps and support hardware oversampling
    • The 12-bit DAC module with 2 digital-to-analog converters supports low-power sampling and hold, and autonomous operation in Stop 1 mode
    • 2x op amp with built-in PGA
    • 2x ultra-low power comparator
  • CRC Compute Unit
  • Debug with development support - Serial Line Debug (SWD), JTAG, Embedded Trace Macro Unit ™ (ETM)
  • Package options that meet ECOPACK2 standards
    • LQFP48(7mm×7mm)、LQFP64(10mm×10mm)和LQFP100(14mm×14mm)
    • UFQFPN32(5mmx5mm)和UFQFPN48(7mmx7mm)
    • UFBGA64(5mm×5mm)和UFBGA100(7mm×7mm)
    • WLCSP52 and WLCSP68 (3.17mmx3.11mm)
  • Temperature range: -40°C to +105°C, junction temperature: +110°C

apply

  • Battery-powered devices
  • Car
  • Industrial automation
  • Consumer electronics

  • Healthcare and medical devices



STM32U375x block diagram

框图 - STMicroelectronics STM32U3超低功耗32位微控制器

STM32U385x block diagram

框图 - STMicroelectronics STM32U3超低功耗32位微控制器



  • Security and access control
  • Smart grids and meters
  • Smart agriculture
  • Wireless communication equipment

  • Consumer and industrial robots