STM32L432KBU6TR              Description

  The STM32L432xx device is an ultra-low power microcontroller based on a high-performance ARM Cortex - M4 32-bit RISC core that operates at up to 80 MHz. The Cortex-M4 kernel uses floating-point unit (FPU) single precision and supports all ARM single-precision data processing instructions and data types. It also implements a complete set of DSP instructions and memory protection unit (MPU) to enhance the security of the application. The STM32L432xx device embeds high-speed memory (up to 256 Kbyte flash memory, 64 Kbyte SRAM), a four-way SPI flash memory interface, and various enhanced iMaganos and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix. STM32L432xx devices embed several protection mechanisms for embedded flash memory and SRAM: read protection, write protection, proprietary code read protection and firewall.

STM32L432KBU6TR               Features

? 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

? 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

– 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, USB, audio, ADC

STM32L432KBU6TR                    Applications

 read protection

write protection

 proprietary code read protection

Firewall