Overview
The STM32L431RBI6TR is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This device 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) for enhanced application security.
The microcontroller is equipped with high-speed memories, including up to 256 Kbyte of Flash memory and 64 Kbyte of SRAM. It also features a Quad SPI flash memories interface, extensive I/Os, and peripherals connected to multiple buses. The device supports various power-saving modes, making it ideal for low-power applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Frequency | Up to 80 MHz |
| Flash Memory | Up to 256 Kbyte |
| SRAM | 64 Kbyte |
| ADC | 12-bit, 5 Msps |
| DAC | 2x 12-bit output channels |
| Operational Amplifier | 1x with built-in PGA |
| Comparators | 2x ultra-low-power |
| Timers | 1x 32-bit, 5x 16-bit, 2x low-power 16-bit |
| Communication Interfaces | 3x SPI, 3x USART, 1x LPUART, 1x SAI, 3x I2C, CAN 2.0B |
| Power Supply | 1.71 to 3.6 V |
| Temperature Range | -40 to +85/105/125 °C |
| Package | UFBGA 64 5x5x0.6 P 0.5 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- 1.71 V to 3.6 V power supply
- -40 °C to 85/105/125 °C temperature range
- Low-power modes: 200 nA in VBAT mode, 8 nA Shutdown mode, 28 nA Standby mode, 280 nA Standby mode with RTC, 1.0 μA Stop 2 mode
- Fast 12-bit ADC (5 Msps) and 2x 12-bit DAC output channels
- One operational amplifier with built-in PGA and two ultra-low-power comparators
- Up to 21 capacitive sensing channels
- Comprehensive set of communication interfaces including SPI, USART, I2C, and CAN 2.0B
- Internal voltage reference buffer, low-power RTC, and multiple timers
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L431RBI6TR is suitable for a wide range of applications requiring low power consumption and high performance. These include:
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and appliances
- Automotive systems and telematics
- IoT and smart home devices
- Energy management and metering systems
Q & A
- What is the core architecture of the STM32L431RBI6TR?
The STM32L431RBI6TR is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L431RBI6TR?
The maximum operating frequency is up to 80 MHz.
- What are the power supply requirements for the STM32L431RBI6TR?
The device operates from a 1.71 to 3.6 V power supply.
- What are the key analog peripherals of the STM32L431RBI6TR?
The device features a 12-bit ADC, two 12-bit DAC output channels, one operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are available on the STM32L431RBI6TR?
The device includes SPI, USART, LPUART, SAI, I2C, and CAN 2.0B interfaces.
- What are the low-power modes supported by the STM32L431RBI6TR?
The device supports several low-power modes including VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- What is the temperature range for the STM32L431RBI6TR?
The device operates in the -40 to +85/105/125 °C temperature range.
- What is the package type for the STM32L431RBI6TR?
The device is available in a UFBGA 64 5x5x0.6 P 0.5 mm package.
- Does the STM32L431RBI6TR support capacitive sensing?
Yes, the device supports up to 21 capacitive sensing channels.
- What development tools are available for the STM32L431RBI6TR?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ for development.
- Is the STM32L431RBI6TR RoHS compliant?
Yes, the device is ECOPACK2 compliant and RoHS compliant.
