Overview
The STM32L431RBI6 is a member of the STM32L431xx family of ultra-low-power microcontrollers from STMicroelectronics. These devices are based on the high-performance Arm® Cortex®-M4 32-bit RISC core, operating at frequencies up to 80 MHz. The Cortex-M4 core includes a Floating Point Unit (FPU) for single-precision data processing and supports a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The STM32L431RBI6 features high-speed memories, including up to 256 KB of Flash memory and 64 KB of SRAM, along with a Quad SPI flash memory interface. It also includes an extensive range of enhanced I/Os and peripherals connected to multiple buses. The device is designed for low-power applications, offering various power-saving modes and independent power supplies for analog components.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memories | Up to 256 KB Flash, 64 KB SRAM, Quad SPI memory interface |
| Power Supply | 1.71 V to 3.6 V |
| Temperature Range | -40 °C to 85/105/125 °C |
| ADC | 1x 12-bit ADC, 5 Msps |
| DAC | 2x 12-bit DAC output channels |
| Timers | 1x 32-bit, 5x 16-bit, 2x low-power 16-bit timers |
| Communication Interfaces | 3x SPI, 3x USART, 3x I2C, 1x CAN 2.0B, 1x SAI |
| Capacitive Sensing Channels | Up to 21 channels |
| Power Modes | VBAT mode: 200 nA, Shutdown mode: 8 nA, Standby mode: 28 nA, Stop 2 mode: 1.0 µA |
| Package | UFBGA 64 5x5x0.6 P 0.5 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™)
- Up to 256 KB Flash memory and 64 KB SRAM
- Quad SPI flash memory interface
- Fast 12-bit ADC (5 Msps), two DAC channels, one operational amplifier, and two ultra-low-power comparators
- Low-power RTC, multiple timers including a 16-bit advanced motor-control timer
- Up to 21 capacitive sensing channels
- Rich communication interfaces including SPI, USART, I2C, CAN 2.0B, and SAI
- Multiple power-saving modes: VBAT, Shutdown, Standby, Stop 2
- Internal voltage reference buffer and independent analog supply inputs
- True random number generator, CRC calculation unit, and 96-bit unique ID
Applications
The STM32L431RBI6 is suitable for a wide range of low-power applications, including:
- Industrial automation and control systems
- Medical devices requiring low power consumption
- Consumer electronics such as smart home devices and wearables
- Automotive systems, especially those requiring high reliability and low power
- IoT devices and sensor networks
Q & A
- What is the core architecture of the STM32L431RBI6?
The STM32L431RBI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L431RBI6?
The maximum operating frequency is up to 80 MHz.
- What are the power supply voltage ranges for the STM32L431RBI6?
The device operates from a power supply voltage of 1.71 V to 3.6 V.
- What are the temperature ranges for the STM32L431RBI6?
The device operates in the -40 °C to 85/105/125 °C temperature range.
- What types of timers are available on the STM32L431RBI6?
The device includes a 32-bit timer, five 16-bit timers, and two low-power 16-bit timers.
- Does the STM32L431RBI6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What communication interfaces are available on the STM32L431RBI6?
The device includes SPI, USART, I2C, CAN 2.0B, and SAI interfaces.
- What are the power-saving modes available on the STM32L431RBI6?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- Is the STM32L431RBI6 suitable for industrial applications?
Yes, it is suitable for industrial automation and control systems due to its high reliability and low power consumption.
- Does the STM32L431RBI6 have any specific features for analog applications?
Yes, it includes a fast 12-bit ADC, two DAC channels, an operational amplifier, and two ultra-low-power comparators.
- What is the package type for the STM32L431RBI6?
The device is available in a UFBGA 64 5x5x0.6 P 0.5 mm package.
