Datasheet

Description STM32L475xx
12/204 DS10969 Rev 5
2 Description
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 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).
In addition, up to 21 capacitive sensing channels are available.
They also feature standard and advanced communication interfaces.
• Three I2Cs
• Three SPIs
• Three USARTs, two UARTs and one Low-Power UART.
• Two SAIs (Serial Audio Interfaces)
• One SDMMC
• One CAN
• One USB OTG full-speed
• One SWPMI (Single Wire Protocol Master Interface)
The STM32L475xx operates in the -40 to +85 °C (+105 °C junction), -40 to +105 °C
(+125
°C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to
3.6
V power supply. A comprehensive set of power-saving modes allows the design of low-
power applications.
Some independent power supplies are supported: analog independent supply input for
ADC, DAC, OPAMPs and comparators, 3.3
V dedicated supply input for USB and up to 14
I/Os can be supplied independently down to 1.08V. A VBAT input allows to backup the RTC
and backup registers.
The STM32L475xx family offers two packages from 64-pin to 100-pin packages.
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