STM32L431CBT6 80MHz Cortex-M4 Ultra-Low-Power MCU 128KB Flash 64KB SRAM LQFP-48 1.71-3.6V -40anddeg;C to +125anddeg;C

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Features

andbull; Ultra-low-power with FlexPowerControl

andndash; 1.71 V to 3.6 V power supply

andndash;-40 anddeg;C to 85/105/125 anddeg;C temperature range

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

andndash; 8 nA Shutdown mode (5 wakeup pins)

andndash; 28 nA Standby mode (5 wakeup pins)

andndash; 280 nA Standby mode with RTC

andndash; 1.0 andmicro;A Stop 2 mode, 1.28 andmicro;A with RTC

andndash; 84 andmicro;A/MHz run mode

andndash; Batch acquisition mode (BAM)

andndash; 4 andmicro;s wakeup from Stop mode

andndash; Brown out reset (BOR)

andndash; Interconnect matrix

andbull; Core: Armandreg; 32-bit Cortexandreg;-M4 CPU with FPU, Adaptive real-time accelerator (ART Acceleratorandtrade;) allowing 0-wait-state execution from Flash memory, frequency up to 80 MHz, MPU, 100DMIPS and DSP instructions

andbull; Performance benchmark

andndash; 1.25 DMIPS/MHz (Drystone 2.1)

andndash; 273.55 CoreMarkandreg; (3.42 CoreMark/MHz @ 80 MHz)

andbull; Energy benchmark

andndash; 176.7 ULPBenchandreg; score

andbull; Clock Sources

andndash; 4 to 48 MHz crystal oscillator

andndash; 32 kHz crystal oscillator for RTC (LSE)

andndash; Internal 16 MHz factory-trimmed RC (andplusmn;1%)

andndash; Internal low-power 32 kHz RC (andplusmn;5%)

andndash; Internal multispeed 100 kHz to 48 MHz oscillator, auto-trimmed by LSE (better than andplusmn;0.25 % accuracy)

andndash; Internal 48 MHz with clock recovery

andndash; 2 PLLs for system clock, audio, ADC

andbull; Up to 83 fast I/Os, most 5 V-tolerant WLCSP49

andbull; RTC with HW calendar, alarms and calibration

andbull; Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors

andbull; 11x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 2x 16 bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer

andbull; Memories

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

andndash; 64 KB of SRAM including 16 KB with hardware parity check

andndash; Quad SPI memory interface

andbull; Rich analog peripherals (independent supply)

andndash; 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 andmicro;A/Msps

andndash; 2x 12-bit DAC output channels, low-power sample and hold

andndash; 1x operational amplifier with built-in PGA

andndash; 2x ultra-low-power comparators

andbull; 16x communication interfaces

andndash; 1x SAI (serial audio interface)

andndash; 3x I2C FM+(1 Mbit/s), SMBus/PMBus

andndash; 4x USARTs (ISO 7816, LIN, IrDA, modem)

andndash; 1x LPUART (Stop 2 wake-up)

andndash; 3x SPIs (and 1x Quad SPI)

andndash; CAN (2.0B Active) and SDMMC interface

andndash; SWPMI single wire protocol master I/F

andndash; IRTIM (Infrared interface)

andbull; 14-channel DMA controller

andbull; True random number generator

andbull; CRC calculation unit, 96-bit unique ID

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Description

The STM32L431xx devices are the ultra-low-power microcontrollers based on the high performance Armandreg; Cortexandreg;-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 which supports all Armandreg; 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 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.

andbull; Three I2Cs

andbull; Three SPIs

andbull; Three USARTs and one Low-Power UART.

andbull; One SAI (Serial Audio Interfaces)

andbull; One SDMMC

andbull; One CAN

andbull; One SWPMI (Single Wire Protocol Master Interface)

The STM32L431xx operates in the -40 to +85 anddeg;C (+105 anddeg;C junction), -40 to +105 anddeg;C (+125 anddeg;C junction) and -40 to +125 anddeg;C (+130 anddeg;C 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 VBAT input allows to backup the RTC and backup registers.

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

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INFORMATION

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