STM32L431KCU6

ARM MCU微控制单元, ARM Cortex-M4 Microcontrollers, ARM 皮质-M4, 32位, 80 MHz, 256 KB, 64 KB

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 Cortex-M4 core features a Floating point unit FPU single precision which 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 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 °C +105 °C junction, -40 to +105 °C +125 °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 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.

**Key Features**

.

Ultra-low-power with FlexPowerControl

.

1.71 V to 3.6 V power supply

.

-40 °C 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

.

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

.

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%

.

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

.

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

.

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

.

2x 12-bit DAC, low-power sample and hold

.

1x operational amplifier with built-in PGA

.

2x ultra-low-power comparators

.

16x communication interfaces

.

1x SAI serial audio interface

.

3x I2C FM+1 Mbit/s, SMBus/PMBus

.

4x USARTs ISO 7816, LIN, IrDA, modem

.

1x LPUART Stop 2 wake-up

.

3x SPIs 4x SPIs with the 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™