The STMicroelectronics STM32L432xx 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 STM32L432xx devices embed high-speed memories (Flash memory up to 256 Kbyte, 64 Kbyte of SRAM), a Quad SPI flash memories interface 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.

Ultra-low-power with FlexPowerControl
1.71 V to 3.6 V power supply
-40 °C to 85/105/125 °C temperature range
8 nA Shutdown mode (2 wakeup pins)
28 nA Standby mode (2 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