STM32L412KBT6 STMicroelectronics 32bit MCU

STM32L412KBT6 Overview

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.

ECAD Model

Symbol

Footprint

Features

1.71 V to 3.6 V power supply
-40 °C to 85/125 °C temperature range
300 nA in V_BAT mode: supply for RTC and 32x32-bit backup registers
16 nA Shutdown mode (4 wakeup pins)
32 nA Standby mode (4 wakeup pins)
245 nA Standby mode with RTC
0.7 μA Stop 2 mode, 0.95 μA with RTC
79 μA/MHz run mode (LDO Mode)
28 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

442 ULPMark-CP
165 ULPMark-PP

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)
Internal 48 MHz with clock recovery
PLL for system clock

Up to 52 fast I/Os, most 5 V-tolerant

RTC with HW calendar, alarms and calibration

Up to 12 capacitive sensing channels: support touchkey, linear and rotary touch sensors

10x timers: 1x 16-bit advanced motor-control, 1x 32-bit and 2x 16-bit general purpose, 1x 16-bit basic, 2x low-power 16-bit timers (available in Stop mode), 2x watchdogs, SysTick timer