ST STM32L476MEY6TR

ARM® Cortex®-M480MHz512KB（512K x 8）

Overview

The STM32L476xx 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 STM32L476xx devices embed high-speed memories (Flash memory up to 1 Mbyte, up to 128 Kbyte of SRAM), a flexible external memory controller (FSMC) for static memories (for devices with packages of 100 pins and more), 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 STM32L476xx devices embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection and Firewall. The devices offer up to three fast 12-bit ADCs (5 Msps), two comparators, two operational amplifiers, two DAC channels, an internal voltage reference buffer, a low-power RTC, two general-purpose 32-bit timer, two 16-bit PWM timers dedicated to motor control, seven general-purpose 16-bit timers, and two 16-bit low-power timers. The devices support four digital filters for external sigma delta modulators (DFSDM).

Features

• Up to 114 fast I/Os, most 5 V-tolerant, up to 14 I/Os with independent supply down to 1.08 V

• RTC with HW calendar, alarms and calibration

• LCD 8× 40 or 4× 44 with step-up converter

• Up to 24 capacitive sensing channels: support touchkey, linear and rotary touch sensors

• 16x timers: 2x 16-bit advanced motor-control, 2x 32-bit and 5x 16-bit general purpose, 2x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer

• Memories

– Up to 1 MB Flash, 2 banks read-whilewrite, proprietary code readout protection

– Up to 128 KB of SRAM including 32 KB with hardware parity check

– External memory interface for static memories supporting SRAM, PSRAM, NOR and NAND memories

– Quad SPI memory interface

• 4x digital filters for sigma delta modulator

• Rich analog peripherals (independent supply)

– 3x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling, 200 μA/Msps

– 2x 12-bit DAC output channels, low-power sample and hold

– 2x operational amplifiers with built-in PGA

– 2x ultra-low-power comparators

• 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 (LDO Mode)

– 39 μA/MHz run mode (@3.3 V SMPS 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

Applications

• Light sensing & controlling devices

• Temperature sensing and controlling devices

• Fire detection & safety devices

• Industrial instrumentation devices

• Process control devices