|Std. Pack Qty
The STM32L431xx devices are the ultra-low-power microcontrollers based on the highperformance 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
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 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.