STM32L412R8Y6P datasheet(13/192 Pages) STMICROELECTRONICS

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DS12469 Rev 4

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STM32L412xx

Description

The STM32L412xx 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 STM32L412xx devices embed high-speed memories (Flash memory up to 128

Kbyte,40 Kbyte of SRAM), 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 STM32L412xx devices embed several protection mechanisms for embedded Flash

memory and SRAM: readout protection, write protection, proprietary code readout

protection and Firewall.

The devices offer two fast 12-bit ADC (5 Msps), two comparators, one operational amplifier,

a low-power RTC, one general-purpose 32-bit timer, one 16-bit PWM timer dedicated to

motor control, four general-purpose 16-bit timers, and two 16-bit low-power timers.

In addition, up to 12 capacitive sensing channels are available.

They also feature standard and advanced communication interfaces.

•

Three I2Cs

•

Two SPIs

•

Three USARTs and one Low-Power UART.

•

One USB full-speed device crystal less

The STM32L412xx operates in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C

(+130 °C junction) temperature ranges from a 1.71 to 3.6 V VDD power supply when using

internal LDO regulator and a 1.00 to 1.32V VDD12 power supply when using external SMPS

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, OPAMP and comparator. A VBAT input allows to backup the RTC and backup

registers. Dedicated VDD12 power supplies can be used to bypass the internal LDO

regulator when connected to an external SMPS.

The STM32L412xx family offers six packages from 32 to 64-pin packages.

Table 2. STM32L412xx family device features and peripheral counts

Peripheral

STM32L412Rx

STM32L412Cx

STM32L412Tx

STM32L412Kx

Flash memory

128KB

SRAM

40KB

Quad SPI

Yes

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