STM32L462RET6     Description

  The STM32L462RET6 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 STM32L462xx device embeds high-speed memory (flash memory up to 512Kbyte, SRAM for 160Kbyte), a four-way SPI flash interface (available in all packages), and various enhanced iGando and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.

STM32L462RET6     Features

? Ultra-low-power with FlexPowerControl

– 1.71 V to 3.6 V power supply

– -40 °C to 85/125 °C temperature range

– 145 nA in VBAT mode: supply for RTC and

32x32-bit backup registers

– 22 nA Shutdown mode (5 wakeup pins)

– 106 nA Standby mode (5 wakeup pins)

– 375 nA Standby mode with RTC

– 2.05 μA Stop 2 mode, 2.40 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

– 335 ULPMark? CP score

– 104 ULPMark? PP score

STM32L462RET6     Applications

 high-speed memory