Overview
The STM32L412RBI6 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 KB of flash memory and 40 KB 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 STM32L412RBI6 is designed for low-power applications, offering various power-saving modes and a wide operating temperature range from -40 to +85 °C (or +125 °C junction temperature).
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memory | 128 KB 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 to +85 °C (+105 °C junction), -40 to +125 °C (+130 °C junction) |
| ADC | Two 12-bit ADCs, 5 Msps, up to 16-bit with hardware oversampling |
| Timers | One 32-bit general-purpose timer, four 16-bit general-purpose timers, two 16-bit low-power timers, one 16-bit advanced motor-control timer |
| Communication Interfaces | Three I2Cs, two SPIs, three USARTs, one Low-Power UART, one USB full-speed device crystal less |
| Package | 64-pin UFBGA 5x5x0.6 P 0.5 mm |
| Power Consumption | 300 nA in VBAT mode, 16 nA Shutdown mode, 32 nA Standby mode, 245 nA Standby mode with RTC, 0.7 µA Stop 2 mode, 79 µA/MHz run mode (LDO Mode), 28 μA/MHz run mode (@3.3 V SMPS Mode) |
Key Features
- Ultra-low-power with FlexPowerControl and multiple power-saving modes
- Includes ST state-of-the-art patented technology
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), and DSP instructions
- High-speed memories: 128 KB flash, 40 KB SRAM, Quad SPI flash memory interface
- Rich analog peripherals: two 12-bit ADCs, one operational amplifier, two comparators, capacitive sensing channels
- Advanced communication interfaces: three I2Cs, two SPIs, three USARTs, one Low-Power UART, one USB full-speed device crystal less
- Low-power RTC with HW calendar, alarms, and calibration
- Up to 12 capacitive sensing channels supporting touchkey, linear, and rotary touch sensors
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
- All packages are ECOPACK2 compliant
Applications
The STM32L412RBI6 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 STM32L412RBI6?
The STM32L412RBI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU), operating at up to 80 MHz.
- What is the memory configuration of the STM32L412RBI6?
The device features 128 KB of flash memory and 40 KB of SRAM, including 8 KB with hardware parity check.
- What is the operating temperature range of the STM32L412RBI6?
The operating temperature range is from -40 to +85 °C (+105 °C junction), and -40 to +125 °C (+130 °C junction).
- What are the key analog peripherals of the STM32L412RBI6?
The device includes two 12-bit ADCs, one operational amplifier, two comparators, and up to 12 capacitive sensing channels.
- What communication interfaces are available on the STM32L412RBI6?
The device features three I2Cs, two SPIs, three USARTs, one Low-Power UART, and one USB full-speed device crystal less.
- What are the power-saving modes available on the STM32L412RBI6?
The device offers multiple power-saving modes, including Shutdown, Standby, Stop 2, and VBAT modes, with very low power consumption.
- What is the package type of the STM32L412RBI6?
The device is available in a 64-pin UFBGA 5x5x0.6 P 0.5 mm package.
- Is the STM32L412RBI6 suitable for industrial applications?
Yes, it is suitable for industrial applications due to its high reliability, low power consumption, and robust feature set.
- What development tools are supported for the STM32L412RBI6?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ for development.
- Is the STM32L412RBI6 compliant with environmental standards?
Yes, all packages are ECOPACK2 compliant.
