STM32L451RE

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Ultra-low-power with FPU Arm Cortex-M4 MCU 80 MHz with 512 kbytes of Flash memory, DFSDM

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Product overview

Description

The STM32L451xx devices are ultra-low-power microcontrollers based on the high-performance Arm® Cortex®-M4 32-bit RISC core operating at a frequency of up to 80 MHz. The Cortex-M4 core features a Floating point unit (FPU) single precision that supports all Arm® single-precision data-processing instructions and data types. It also implements a full set of DSP instructions and a memory protection unit (MPU) which enhances application security. The STM32L451xx devices embed high-speed memories (Flash memory up to 512 Kbyte, 160 Kbyte of SRAM), a Quad SPI Flash memories interface (available on all packages) and an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.
The STM32L451xx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall.
The devices offer a fast 12-bit ADC (5 Msps), two comparators, one operational amplifier, one DAC channel, an internal voltage reference buffer, a low-power RTC, one general-purpose 32-bit timer, one 16-bit PWM timer dedicated to motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers.
In addition, up to 21 capacitive sensing channels are available.
They also feature standard and advanced communication interfaces, namely four I2Cs, three SPIs, three USARTs, one UART and one Low-Power UART, one SAI, one SDMMC, one CAN.
The STM32L451xx operates in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V power supply. A comprehensive set of power-saving modes makes possible the design of low-power applications.
Some independent power supplies are supported: analog independent supply input for ADC, DAC, OPAMP and comparators. A VBAT input makes it possible to backup the RTC and backup registers.
The STM32L451xx family offers six packages from 48 to 100-pin packages.
  • All features

    • Ultra-low-power with FlexPowerControl
      • 1.71 V to 3.6 V power supply
      • -40 °C to 85/125 °C temperature range
      • 145 nA in VBAT mode: supply for RTC and 32x32-bit backup registers
      • 22 nA Shutdown mode (5 wakeup pins)
      • 106 nA Standby mode (5 wakeup pins)
      • 375 nA Standby mode with RTC
      • 2.05 µA Stop 2 mode, 2.40 µA with RTC
      • 84 µA/MHz run mode
      • Batch acquisition mode (BAM)
      • 4 µs wakeup from Stop mode
      • Brown out reset (BOR)
      • Interconnect matrix
    • Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions
    • Performance benchmark
      • 1.25 DMIPS/MHz (Drystone 2.1)
      • 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)
    • Energy benchmark
      • 335 ULPMark™ CP score
      • 104 ULPMark™ PP score
    • Clock Sources
      • 4 to 48 MHz crystal oscillator
      • 32 kHz crystal oscillator for RTC (LSE)
      • Internal 16 MHz factory-trimmed RC (±1%)
      • Internal low-power 32 kHz RC (±5%)
      • Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than ±0.25 % accuracy)
      • Internal 48 MHz with clock recovery
      • 2 PLLs for system clock, audio, ADC
    • Up to 83 fast I/Os, most 5 V-tolerant
    • RTC with HW calendar, alarms and calibration
    • Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors
    • 12x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 3x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer
    • Memories
      • Up to 512 KB single bank Flash, proprietary code readout protection
      • 160 KB of SRAM including 32 KB with hardware parity check
      • Quad SPI memory interface
    • Rich analog peripherals (independent supply)
      • 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 µA/Msps
      • 1x 12-bit DAC output channels, low-power sample and hold
      • 1x operational amplifier with built-in PGA
      • 2x ultra-low-power comparators
      • Accurate 2.5 V or 2.048 V reference voltage buffered output
    • 16x communication interfaces
      • 1x SAI (serial audio interface)
      • 4x I2C FM+(1 Mbit/s), SMBus/PMBus
      • 3x USARTs (ISO 7816, LIN, IrDA, modem)
      • 1x UART (LIN, IrDA, modem)
      • 1x LPUART (Stop 2 wake-up)
      • 3x SPIs (and 1x Quad SPI)
      • CAN (2.0B Active) and SDMMC interface
      • IRTIM (Infrared interface)
    • 14-channel DMA controller
    • True random number generator
    • CRC calculation unit, 96-bit unique ID
    • Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
    • All packages are ECOPACK2® compliant

Circuit Diagram

All tools & software

    • Part number
      Status
      Description
      Type
      Supplier

      AWS IoT Core

      Active

      AWS IoT Core is a managed cloud service that lets connected devices easily and securely interact with cloud applications and other devices

      Cloud AWS
      AWS IoT Core

      Description:

      AWS IoT Core is a managed cloud service that lets connected devices easily and securely interact with cloud applications and other devices

      AZURE Cloud

      Active

      Microsoft Azure is an ever-expanding set of cloud services to help your organization meet your business challenges. It's the freedom to build, manage, and deploy applications on a massive, global network using your favorite tools and frameworks.

      Cloud Microsoft
      AZURE Cloud

      Description:

      Microsoft Azure is an ever-expanding set of cloud services to help your organization meet your business challenges. It's the freedom to build, manage, and deploy applications on a massive, global network using your favorite tools and frameworks.

      Enhanced Carrier Connectivity Services

      Active

      Optimized regional cellular connectivity with one point of accountability & invoice for multiple Tier-1 carrier services

      Cloud Sierra Wireless
      Enhanced Carrier Connectivity Services

      Description:

      Optimized regional cellular connectivity with one point of accountability & invoice for multiple Tier-1 carrier services

      Global Smart Connectivity Services

      Active

      Smart Connectivity simplifies IoT deployments, eliminates coverage gaps with access to multiple networks, while reducing the total cost of opportunity

      Cloud Sierra Wireless
      Global Smart Connectivity Services

      Description:

      Smart Connectivity simplifies IoT deployments, eliminates coverage gaps with access to multiple networks, while reducing the total cost of opportunity

      Octave Services

      Active

      Octave all-in-one platform for connecting IoT assets and microcontrollers to the cloud

      Cloud Sierra Wireless
      Octave Services

      Description:

      Octave all-in-one platform for connecting IoT assets and microcontrollers to the cloud

      Watson IoT Platform

      Active

      IBM Watson IoT Platform is a managed, cloud-hosted service designed to make it simple to derive value from your Internet of Things devices.

      Cloud IBM
      Watson IoT Platform

      Description:

      IBM Watson IoT Platform is a managed, cloud-hosted service designed to make it simple to derive value from your Internet of Things devices.
    • Part number
      Status
      Description
      Type
      Supplier

      Enhanced Carrier Connectivity SIM

      Active

      Cellular connectivity that simplifies, optimizes regional deployments via 1 point of accountability and invoice for multiple Tier-1 carrier services

      Components and Modules Sierra Wireless
      Enhanced Carrier Connectivity SIM

      Description:

      Cellular connectivity that simplifies, optimizes regional deployments via 1 point of accountability and invoice for multiple Tier-1 carrier services

      Global Smart Connectivity SIM

      Active

      Sierra Wireless' Smart Connectivity provides resilient Global cellular coverage in a single SIM

      Components and Modules Sierra Wireless
      Global Smart Connectivity SIM

      Description:

      Sierra Wireless' Smart Connectivity provides resilient Global cellular coverage in a single SIM