Overview
The STM32L431RBT6TR 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 a frequency of up to 80 MHz. The Cortex-M4 core includes a Floating Point Unit (FPU) single precision, supporting all Arm® single-precision data-processing instructions and data types, as well as a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The microcontroller features high-speed memories, including up to 256 Kbyte of Flash memory and 64 Kbyte of SRAM, along with a Quad SPI flash memories interface. It also includes an extensive range of enhanced I/Os and peripherals connected to multiple buses.
The STM32L431RBT6TR is designed for low-power applications, offering various power-saving modes and a wide temperature range of -40 to +85 °C. It supports independent power supplies for analog components and includes a VBAT input for backing up the RTC and backup registers.
Key Specifications
| Parameter | Value |
|---|---|
| Core | Arm Cortex-M4 with FPU |
| Maximum Frequency | Up to 80 MHz |
| Supply Voltage | 1.71 V to 3.6 V |
| Operating Temperature | -40 °C to +85 °C |
| Flash Memory | Up to 256 Kbyte |
| SRAM | 64 Kbyte |
| ADC | 12-bit, 5 Msps |
| DAC | 2x 12-bit output channels |
| Timers | 1x 32-bit, 5x 16-bit |
| Communication Interfaces | 3x SPI, 3x USART, 3x I2C, CAN 2.0B |
| Package | LQFP-64 |
Key Features
- Ultra-low-power with FlexPowerControl
- Fast wake-up from power-down mode (4 μs)
- Accurate clock and calendar management
- High-speed data transfer
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, comparators
- Multiple communication interfaces: SPI, USART, I2C, CAN 2.0B
- Up to 21 capacitive sensing channels
- Low-power modes: Shutdown, Standby, Stop 2 with RTC
- Internal voltage reference buffer and low-power RTC
- True random number generator and CRC calculation unit
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L431RBT6TR is suitable for a wide range of applications due to its high performance, low power consumption, and extensive peripheral set. These include:
- Industrial automation
- Consumer electronics
- Internet of Things (IoT) devices
- Medical devices requiring low power and high precision
- Automotive systems
- Smart home devices
Q & A
- What is the core architecture of the STM32L431RBT6TR?
The STM32L431RBT6TR is based on the Arm® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L431RBT6TR?
The maximum operating frequency is up to 80 MHz.
- What is the supply voltage range for the STM32L431RBT6TR?
The supply voltage range is from 1.71 V to 3.6 V.
- What are the key analog peripherals available on the STM32L431RBT6TR?
The key analog peripherals include a 12-bit ADC, two 12-bit DAC channels, an operational amplifier, and two ultra-low-power comparators.
- What communication interfaces are supported by the STM32L431RBT6TR?
The device supports multiple communication interfaces such as SPI, USART, I2C, and CAN 2.0B.
- What are the low-power modes available on the STM32L431RBT6TR?
The device offers several low-power modes including Shutdown, Standby, and Stop 2 with RTC.
- What is the maximum temperature range for the STM32L431RBT6TR?
The operating temperature range is from -40 °C to +85 °C.
- What type of memory does the STM32L431RBT6TR have?
The device features up to 256 Kbyte of Flash memory and 64 Kbyte of SRAM.
- What development tools are available for the STM32L431RBT6TR?
Development support includes serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- What are some typical applications for the STM32L431RBT6TR?
Typical applications include industrial automation, consumer electronics, IoT devices, and medical devices.
- What is the package type for the STM32L431RBT6TR?
The package type is LQFP-64.
