STM32L431RCT6 LQFP-64

Original genuine ARM Cortex-M4 32-bit microcontroller MCU

Product Description

Ultra-low-power with FPU ARM Cortex-M4 MCU 80 MHz with 256 Kbytes Flash

    The STM32L431xx devices are the 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 Corex-M4 core features a Floating point unit (FPU) single-precision which supports all Arm® single-preclsion 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 STM32L431xx devices embed high-speed memories (Flash memory up to 256 Kbyte, 64 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 STM32L431xx 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, two DAC channels, 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.

    The STM32L431xx operates in the -40 to +85℃ (+105℃ junction), -40 to +105℃ (+125℃ junction) and -40 to +125℃ (+130℃ junction) temperature ranges from a 1.71 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications.

    Some independent power supplies are supported: analog independent supply input for ADC, DAC, OPAMP and comparators. A V_BAT input allows to backup the RTC and backup registers.

    The STM32L431xx family offers nine packages from 32 to 100-pin packages.

Product features

      Ultra-low-power with FlexPowerControl

- 1.71 V to 3.6 V power supply

- 40℃ to 85/105/125°C temperature range

- 200 nA in VBAT mode: supply for RTC and 32x32-bit backup registers

- 8 nA Shutdown mode (5 wakeup pins)

- 28 nA Standby mode (5 wakeup pins)

- 280 nA Standby mode with RTC

- 1.0 μA Stop 2 mode, 1.28 μA with RTC

- 84 μA/MHz run mode

- Batch acquisition mode (BAM)

- 4 μs wakeup from Stop mode

- Browwn 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

      Perfomance benchmark

- 1.25 DMIPS/MHz(Drystone 2.1)

- 273.55 CoreMark® (3.42 CoreMark/MHz @ 80 MHz)

      Energy benchmark

- 176.7 ULPBench® 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%)

- Interal 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

      11x timers

- 1 x 16-bit advanced motor-control, 1 x 32-bit and 2 x 16-bit general purpose, 2 x 16-bit basic, 2 x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer

       Memories

- Up to 256 KB single bank Flash, proprietary code readout protection

- 64 KB of SRAM including 16 KB with hardware parity check

- Quad SPI memory interface

       Rich analog peripherals (independent supply)

- 1 x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps

- 2 x12-bit DAC output channels, low-power sample and hold

- 1 x operational amplifier with built-in PGA

- 2 x ultra-low-power comparators

      16 x communication interfaces

- 1 x SAI (serial audio interface)

- 3 x I²C FM+(1 Mbit/s), SMBus/PIMBus

- 4 x USARTS (ISO 7816.LIN,IrDA, modem)

- 1 x LPUART (Stop 2 wake-up)

- 3 x SPIs (and 1x Quad SPI)

- CAN (2.0B Active) and SDMMC interface

- SWPMI single wire protocol master I/F

- 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

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