Overview
The STM32L412K8U6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This MCU operates at a frequency of up to 80 MHz and features a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also includes a full set of DSP instructions and a Memory Protection Unit (MPU) to enhance application security.
The device is part of the STM32L412xx family, which is known for its ultra-low-power consumption and advanced peripherals. It includes high-speed memories such as 128 KB of flash memory and 40 KB of SRAM, along with a Quad SPI flash memory interface. The MCU supports a wide range of operating temperatures from -40 °C to 85 °C (or up to 125 °C in certain configurations) and operates on a power supply ranging from 1.71 V to 3.6 V.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Frequency | Up to 80 MHz |
| Flash Memory | 128 KB single bank flash |
| SRAM | 40 KB (including 8 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to 85 °C (or up to 125 °C) |
| ADC | 2x 12-bit ADC, 5 Msps, up to 16-bit with hardware oversampling |
| Timers | 1x 32-bit, 4x 16-bit general purpose, 1x 16-bit basic, 2x low-power 16-bit timers |
| Communication Interfaces | USB 2.0 full-speed, 3x I2C, 3x USART, 1x LPUART, 2x SPI, 1x Quad SPI |
| Package | UFQFPN 32 (5x5x0.55 mm) |
| I/Os | Up to 52 fast I/Os, most 5 V-tolerant |
Key Features
- Ultra-low-power with FlexPowerControl
- Adaptive real-time accelerator (ART Accelerator™) allowing 0-wait-state execution from flash memory
- Memory Protection Unit (MPU) for enhanced security
- Rich analog peripherals: 2x 12-bit ADC, 1x operational amplifier, 1x ultra-low-power comparator
- Advanced communication interfaces: USB 2.0 full-speed, 3x I2C, 3x USART, 1x LPUART, 2x SPI, 1x Quad SPI
- Up to 12 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors
- Multiple power-saving modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Internal clock sources: 4 to 48 MHz crystal oscillator, 32 kHz crystal oscillator for RTC, internal low-power oscillators
- RTC with hardware calendar, alarms, and calibration
- True random number generator, CRC calculation unit, and 96-bit unique ID
Applications
The STM32L412K8U6 is suitable for a wide range of applications that require low power consumption and high performance. These include:
- IoT devices and smart sensors
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and wearables
- Automotive systems and telematics
- Energy harvesting and battery-powered devices
Q & A
- What is the core architecture of the STM32L412K8U6?
The STM32L412K8U6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L412K8U6?
The maximum operating frequency is up to 80 MHz.
- How much flash and SRAM memory does the STM32L412K8U6 have?
The device has 128 KB of single bank flash memory and 40 KB of SRAM.
- What is the power supply range for the STM32L412K8U6?
The power supply range is from 1.71 V to 3.6 V.
- What are the key analog peripherals of the STM32L412K8U6?
The key analog peripherals include 2x 12-bit ADC, 1x operational amplifier, and 1x ultra-low-power comparator.
- What communication interfaces are available on the STM32L412K8U6?
The device features USB 2.0 full-speed, 3x I2C, 3x USART, 1x LPUART, 2x SPI, and 1x Quad SPI.
- What are the power-saving modes available on the STM32L412K8U6?
The device supports VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- Does the STM32L412K8U6 support capacitive sensing?
Yes, it supports up to 12 capacitive sensing channels.
- What is the package type of the STM32L412K8U6?
The package type is UFQFPN 32 (5x5x0.55 mm).
- Is the STM32L412K8U6 RoHS compliant?
Yes, the device is RoHS compliant and follows the ECOPACK2 standard.
