Overview
The STM32L431CBT6 is an ultra-low-power microcontroller from STMicroelectronics, based on the Arm Cortex-M4 32-bit RISC core. It features a Floating Point Unit (FPU) and supports all Arm single-precision data-processing instructions, along with a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security. The device operates within a temperature range of -40 to +85 °C (and up to +105 °C or +125 °C junction temperature) and is powered by a 1.71 to 3.6 V supply.
The STM32L431CBT6 is part of the STM32L431xx family, which is designed for low-power applications and offers a comprehensive set of power-saving modes, including sleep, stop, standby, and shutdown modes. It also features dynamic voltage scaling to optimize power consumption.
Key Specifications
| Specification | Details |
|---|---|
| Core | Arm Cortex-M4 32-bit RISC with FPU |
| Operating Temperature | -40 °C to +85 °C (up to +105 °C or +125 °C junction) |
| Power Supply | 1.71 V to 3.6 V |
| Flash Memory | Up to 256 Kbytes |
| SRAM | 64 Kbytes |
| ADC | Fast 12-bit ADC (5 Msps) |
| DAC | 2 x 12-bit DAC channels |
| Timers | 1 x 32-bit timer, 5 x 16-bit timers (including 1 x 16-bit PWM timer for motor control) |
| Comparators | 2 |
| Operational Amplifier | 1 |
| Capacitive Sensing Channels | Up to 21 channels |
| Communication Interfaces | 3 x I2C, 3 x SPI, 3 x USART, 1 x Low-Power UART, 1 x SAI |
| Package Options | Various packages from 32 to 100 pins |
Key Features
- Ultra-low-power consumption with dynamic voltage scaling and multiple power-saving modes.
- High-performance Arm Cortex-M4 core with FPU and DSP instructions.
- Comprehensive set of analog peripherals including a fast 12-bit ADC, two DAC channels, two comparators, and one operational amplifier.
- Advanced communication interfaces such as I2C, SPI, USART, and SAI.
- Up to 21 capacitive sensing channels.
- Internal voltage reference buffer and low-power RTC.
- Multiple timers including a 32-bit timer and several 16-bit timers with various functionalities.
- Support for independent power supplies for analog peripherals.
- VBAT input for RTC and backup registers.
Applications
- Low-power IoT devices and smart sensors.
- Industrial automation and control systems.
- Medical devices requiring low power consumption.
- Automotive systems, especially those needing advanced motor control.
- Consumer electronics such as wearables and portable devices.
- Energy harvesting and battery-powered devices.
Q & A
- What is the core architecture of the STM32L431CBT6?
The STM32L431CBT6 is based on the Arm Cortex-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What is the operating temperature range of the STM32L431CBT6?
The device operates within a temperature range of -40 °C to +85 °C (and up to +105 °C or +125 °C junction temperature).
- What is the power supply range for the STM32L431CBT6?
The power supply range is 1.71 V to 3.6 V.
- How much Flash and SRAM memory does the STM32L431CBT6 have?
The device has up to 256 Kbytes of Flash memory and 64 Kbytes of SRAM.
- What analog peripherals are available on the STM32L431CBT6?
The device features a fast 12-bit ADC, two DAC channels, two comparators, and one operational amplifier.
- What communication interfaces are supported by the STM32L431CBT6?
The device supports I2C, SPI, USART, Low-Power UART, and SAI interfaces.
- Does the STM32L431CBT6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What are the power-saving modes available on the STM32L431CBT6?
The device offers sleep, stop, standby, and shutdown modes to minimize power consumption.
- Can the STM32L431CBT6 be used in automotive applications?
Yes, it is suitable for automotive systems, especially those requiring advanced motor control.
- Is the STM32L431CBT6 suitable for medical devices?
Yes, it is suitable for medical devices due to its low power consumption and robust feature set.
