STM32L476MGY6TR Description

The STM32L476MGY6TR device is an ultra-low-power microcontroller built around the powerful 32-bit RISC Arm? Cortex?-M4 core that can operate at up to 80 MHz. A floating point unit (FPU) single precision is a characteristic of the Cortex-M4 core that supports all Arm? single-precision data-processing instructions and data formats. Additionally, it incorporates a memory protection unit (MPU) that improves program security together with the whole range of DSP instructions.

The STM32L476MGY6TR device includes 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), as well as a wide variety of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix.

The STM32L476MGY6TR device includes a number of readout protection, write protection, proprietary code readout protection, and firewall protection techniques for embedded Flash memory and SRAM.

Two comparators, two operational amplifiers, two DAC channels, an internal voltage reference buffer, a low-power RTC, two general-purpose 32-bit timers, two 16-bit PWM timers for motor control, seven general-purpose 16-bit timers, and two 16-bit low-power timers are among the features available on the devices. Four digital filters for external sigma delta modulators are supported by the devices.

STM32L476MGY6TR 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

STM32L476MGY6TR Applications

• Automobile engine control systems

• Implantable medical devices

• Remote controls

• Office machines

• Appliances