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    STM32L451VET6

    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 generalpurpose 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.

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      SPECIFICATION

      • 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
      32×32-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