Overview
The STM32L412R8T6 is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L412xx family. It is 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 includes a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types, along with a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The device features high-speed memories, including up to 128 Kbytes of flash memory and 40 Kbytes of SRAM, as well as a Quad SPI flash memory interface. It also includes an extensive range of enhanced I/Os and peripherals connected to multiple buses.
The STM32L412R8T6 is designed for low-power applications, offering various power-saving modes and a wide temperature range of -40 to +85 °C (or +125 °C in some grades). It supports multiple power supply options, including an internal LDO regulator and external SMPS supply.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | 128 KB single bank flash, 40 KB SRAM (including 8 KB with hardware parity check) |
| Power Supply | 1.71 V to 3.6 V (internal LDO), 1.00 to 1.32 V (external SMPS) |
| Temperature Range | -40 °C to +85 °C (or +125 °C in some grades) |
| 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 advanced motor-control, 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 | LQFP 64 10x10x1.4 mm |
| Power Modes | VBAT mode: 300 nA, Shutdown mode: 16 nA, Standby mode: 32 nA, Stop 2 mode: 0.7 µA (with RTC: 0.95 µA) |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- High-speed memories: 128 KB flash, 40 KB SRAM, Quad SPI flash memory interface
- Rich analog peripherals: 2x 12-bit ADC, 1x operational amplifier, 1x ultra-low-power comparator
- Multiple communication interfaces: USB 2.0 full-speed, I2C, USART, LPUART, SPI, Quad SPI
- Up to 12 capacitive sensing channels for touchkey, linear, and rotary touch sensors
- 10 timers: 1x 32-bit, 4x 16-bit general purpose, 1x 16-bit advanced motor-control, 2x low-power 16-bit timers
- 14-channel DMA controller, True random number generator, CRC calculation unit
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
- All packages are ECOPACK2 compliant
Applications
The STM32L412R8T6 is suitable for a wide range of low-power applications, including:
- IoT devices and smart home appliances
- Industrial automation and control systems
- Medical devices requiring low power consumption
- Automotive systems, especially those needing high reliability and low power
- Consumer electronics such as wearables and portable devices
Q & A
- What is the core architecture of the STM32L412R8T6?
The STM32L412R8T6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What are the memory specifications of the STM32L412R8T6?
The device features 128 KB of single bank flash memory and 40 KB of SRAM, including 8 KB with hardware parity check.
- What is the power supply range for the STM32L412R8T6?
The power supply range is from 1.71 V to 3.6 V using the internal LDO regulator, and from 1.00 to 1.32 V using an external SMPS supply.
- What are the key analog peripherals of the STM32L412R8T6?
The device includes 2x 12-bit ADCs, 1x operational amplifier, and 1x ultra-low-power comparator.
- What communication interfaces are available on the STM32L412R8T6?
The device supports 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 STM32L412R8T6?
The device offers VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode, among others, to minimize power consumption.
- What is the temperature range for the STM32L412R8T6?
The device operates in the -40 to +85 °C (or +125 °C in some grades) temperature range.
- What are the capacitive sensing capabilities of the STM32L412R8T6?
The device supports up to 12 capacitive sensing channels for touchkey, linear, and rotary touch sensors.
- What development tools are supported by the STM32L412R8T6?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ for development.
- Is the STM32L412R8T6 environmentally friendly?
Yes, all packages of the STM32L412R8T6 are ECOPACK2 compliant.
