STM32L475RET6TR STMicroelectronics 32bit MCU

STM32L475RET6TR Overview

The STM32L475xx 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 STM32L475xx 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 100 pins package), 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 STM32L475xx 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 two 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).
In addition, up to 21 capacitive sensing channels are available.
They also feature standard and advanced communication interfaces.

ECAD Model

Symbol

Footprint

Features

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 Stop 2 with RTC
100 μA/MHz run mode
Batch acquisition mode (BAM)
4 μs wakeup from Stop mode
Brown out reset (BOR) in all modes except shutdown
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/1.25DMIPS/MHz (Dhrystone 2.1), and DSP instructions

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

RTC with HW calendar, alarms and calibration

Up to 21 capacitive sensing channels: support touchkey, linear and rotary touch sensors

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

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

Memories

Up to 1 MB Flash, 2 banks read-while-write, 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

Applications

STM32L4

Specifications

Core Processor ARM Cortex M4
Speed 80MHz
Operating Temperature -40℃ ~ 85℃ (TA)
Program Memory Type FLASH
RAM Size 128K x 8
Number of I/O 51
Peripherals Brown-out Detect/Reset, DMA, PWM, WDT
Mounting Type Surface Mount
Oscillator Type Internal
Supplier Device Package 64-LQFP (10x10)
Package / Case 64-LQFP
Core Size 32-Bit
Connectivity CANbus, I2C, IrDA, LINbus, MMC/SD, QSPI, SAI, SPI, SWPMI, UART/USART, USB OTG
Program Memory Size 512KB (512K x 8)
Data Converters A/D 16x12b; D/A 2x12b
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.6V