Overview
The STM32L431CBU6 is an ultra-low-power microcontroller from STMicroelectronics, based on the high-performance Arm® Cortex®-M4 32-bit RISC core. This MCU operates at a frequency of up to 80 MHz and includes a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types. It also features a full set of DSP instructions and a memory protection unit (MPU) to enhance application security.
The device is designed for low-power applications, offering various power-saving modes and a wide temperature range of -40 °C to 85/105/125 °C. It is suitable for a variety of applications requiring high performance and low energy consumption.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU |
| Operating Frequency | Up to 80 MHz |
| Flash Memory | Up to 256 KB single bank Flash |
| SRAM | 64 KB of SRAM including 16 KB with hardware parity check |
| 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, up to 16-bit with hardware oversampling |
| DAC | 2x 12-bit DAC output channels, low-power sample and hold |
| Timers | 1x 32-bit, 5x 16-bit timers, 2x low-power 16-bit timers, 2x watchdogs, SysTick timer |
| Communication Interfaces | 3x SPIs, 3x I2C FM+, 4x USARTs, 1x LPUART, 1x CAN (2.0B Active), SDMMC interface |
| Package | UFQFPN-48 (7x7 mm) |
Key Features
- Ultra-low-power with FlexPowerControl
- Batch acquisition mode (BAM) and 4 μs wakeup from Stop mode
- Brown out reset (BOR) and interconnect matrix
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses, and a 32-bit multi-AHB bus matrix
- Protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, proprietary code readout protection, and Firewall
- Low-power RTC, VBAT input for backup of RTC and backup registers
Applications
- 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 low power and high performance
- IoT devices and sensor networks
Q & A
- What is the core architecture of the STM32L431CBU6?
The STM32L431CBU6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L431CBU6?
The maximum operating frequency is up to 80 MHz.
- What is the power supply range for the STM32L431CBU6?
The power supply range is from 1.71 V to 3.6 V.
- What are the key analog peripherals available on the STM32L431CBU6?
The key analog peripherals include a 12-bit ADC, 12-bit DAC, an operational amplifier, and ultra-low-power comparators.
- What are the power-saving modes available on the STM32L431CBU6?
The device offers several power-saving modes including Shutdown mode, Standby mode, Stop 2 mode, and VBAT mode.
- What is the temperature range for the STM32L431CBU6?
The temperature range is -40 °C to 85/105/125 °C.
- What communication interfaces are available on the STM32L431CBU6?
The device features 3x SPIs, 3x I2C FM+, 4x USARTs, 1x LPUART, 1x CAN (2.0B Active), and an SDMMC interface.
- What is the package type for the STM32L431CBU6?
The package type is UFQFPN-48 (7x7 mm).
- Does the STM32L431CBU6 have any protection mechanisms for memory?
Yes, it includes readout protection, write protection, proprietary code readout protection, and Firewall for embedded Flash memory and SRAM.
- What is the purpose of the VBAT input on the STM32L431CBU6?
The VBAT input allows for the backup of the RTC and backup registers.
