STM32L475VET6 Description
The STM32L475xx 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. STM32L475xx devices embed high-speed memory (flash memory up to 1 Mbyte, SRAM up to 128Kbyte), flexible external memory controller (FSMC) for static memory, four-way SPI flash interface (available in all packages), and various enhanced Icano and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix. STM32L475xx devices embed several protection mechanisms for embedded flash memory and SRAM: read protection, write protection, proprietary code read protection and firewall.
STM32L475VET6 Features
? Ultra-low-power with FlexPowerControl
– 1.71 V to 3.6 V power supply
– -40 °C to 85/105/125 °C temperature range
– 300 nA in VBAT mode: supply for RTC and
32x32-bit backup registers
– 30 nA Shutdown mode (5 wakeup pins)
– 120 nA Standby mode (5 wakeup pins)
– 420 nA Standby mode with RTC
– 1.1 μA Stop 2 mode, 1.4 μA with RTC
– 100 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
– 294 ULPMark? CP score
– 106 ULPMark? PP 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)
– 3 PLLs for system clock, USB, audio, ADC
STM32L475VET6 Applications
read protection
write protection
proprietary code read protection
