Overview
The STM32L431CBY6TR 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) for single-precision data processing. It is designed to enhance application security with a memory protection unit (MPU) and a full set of DSP instructions.
The microcontroller is part of the STM32L431xx family, which is known for its low power consumption, making it suitable for applications requiring minimal energy usage. It supports a wide temperature range and various power-saving modes, allowing for the design of low-power applications.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® Cortex®-M4 32-bit RISC core with FPU |
| Operating Frequency | Up to 80 MHz |
| Temperature Range | -40 °C to +85 °C (+105 °C junction), -40 °C to +105 °C (+125 °C junction), -40 °C to +125 °C (+130 °C junction) |
| Power Supply | 1.71 V to 3.6 V |
| Flash Memory | Up to 256 KB single bank Flash |
| SRAM | 64 KB of SRAM including 16 KB with hardware parity check |
| ADC | 1x 12-bit ADC 5 Msps, up to 16-bit with hardware oversampling |
| DAC | 2x 12-bit DAC output channels |
| Timers | 1x 32-bit, 5x 16-bit general purpose, 2x 16-bit low-power timers |
| Communication Interfaces | 3x SPI, 3x USART, 1x SAI, 1x CAN 2.0B, 4x I2C FM+ |
| I/Os | Up to 39 high current I/Os |
| Package | SMD, various packages from 32 to 100 pins |
Key Features
- Ultra-low-power with FlexPowerControl
- 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, 1.28 μA with RTC
- Fast 12-bit ADC (5 Msps) and 2x 12-bit DAC output channels
- 1x operational amplifier with built-in PGA and 2x ultra-low-power comparators
- Low-power RTC and backup registers
- Up to 21 capacitive sensing channels
- Advanced communication interfaces including SAI, I2C, USART, SPI, and CAN 2.0B
- Independent power supplies for analog peripherals
- Batch acquisition mode (BAM) and 4 μs wakeup from Stop mode
- Brown out reset (BOR) and interconnect matrix
Applications
The STM32L431CBY6TR is suitable for a wide range of applications that require low power consumption and high performance. These include:
- IoT devices and smart sensors
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and wearables
- Automotive systems and telematics
- Energy management and metering systems
Q & A
- What is the core architecture of the STM32L431CBY6TR?
The STM32L431CBY6TR is based on the Arm® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What is the operating frequency of the STM32L431CBY6TR?
The operating frequency is up to 80 MHz.
- What is the temperature range of the STM32L431CBY6TR?
The temperature range is -40 °C to +85 °C (+105 °C junction), -40 °C to +105 °C (+125 °C junction), and -40 °C to +125 °C (+130 °C junction).
- What are the power-saving modes available in the STM32L431CBY6TR?
The device supports several low power modes including VBAT mode, Shutdown mode, Standby mode, Stop 2 mode, and others.
- What type of memory does the STM32L431CBY6TR have?
The device has up to 256 KB single bank Flash and 64 KB of SRAM.
- What analog peripherals are available on the STM32L431CBY6TR?
The device features a 12-bit ADC, 2x 12-bit DAC output channels, an operational amplifier, and ultra-low-power comparators.
- What communication interfaces are supported by the STM32L431CBY6TR?
The device supports SPI, USART, SAI, I2C, and CAN 2.0B interfaces.
- How many I/Os does the STM32L431CBY6TR have?
The device has up to 39 high current I/Os.
- What is the package type of the STM32L431CBY6TR?
The device is available in SMD packages with various pin counts from 32 to 100 pins.
- What are some typical applications for the STM32L431CBY6TR?
The device is suitable for IoT devices, industrial automation, medical devices, consumer electronics, automotive systems, and energy management systems.
- Does the STM32L431CBY6TR support capacitive sensing?
Yes, the device supports up to 21 capacitive sensing channels.
