Overview
The STM32L431KCU6TR is an ultra-low-power microcontroller from STMicroelectronics, part of the STM32L431xx family. It is 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) and 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) for enhanced application security.
The device is designed for low-power applications, offering various power-saving modes and a comprehensive set of peripherals, including high-speed memories, enhanced I/Os, and advanced communication interfaces.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Flash Memory | Up to 256 KB single bank, proprietary code readout protection |
| SRAM | 64 KB, 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 |
| Power Consumption | 200 nA in VBAT mode, 8 nA Shutdown mode, 28 nA Standby mode, 280 nA Standby mode with RTC |
| Timers | 1x 32-bit, 5x 16-bit (including 1 advanced motor-control), 2x low-power 16-bit timers |
| Analog Peripherals | 1x 12-bit ADC (5 Msps), 2x 12-bit DAC channels, 1x operational amplifier, 2x ultra-low-power comparators |
| Communication Interfaces | 1x SAI, 3x I2C, 4x USARTs, 1x LPUART, 3x SPIs (including 1x Quad SPI), CAN (2.0B Active), SDMMC interface |
| Package | UFQFPN 32 5x5x0.55 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 single bank Flash, proprietary code readout protection
- 64 KB of SRAM including 16 KB with hardware parity check
- Quad SPI memory interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC channels, operational amplifier, ultra-low-power comparators
- Multiple communication interfaces: SAI, I2C, USARTs, LPUART, SPIs, CAN, SDMMC
- Up to 21 capacitive sensing channels
- Low-power modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Development support: serial wire debug (SWD), JTAG, Embedded Trace Macrocell™
Applications
The STM32L431KCU6TR is suitable for a wide range of applications requiring low power consumption and high performance, such as:
- IoT devices and smart sensors
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics and wearable devices
- Automotive systems and telematics
Q & A
- What is the core architecture of the STM32L431KCU6TR?
The STM32L431KCU6TR is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum frequency of the CPU?
The CPU operates at frequencies up to 80 MHz.
- What are the power supply and temperature ranges of the device?
The device operates from a 1.71 V to 3.6 V power supply and in a temperature range of -40 °C to 85/105/125 °C.
- What are the key low-power modes of the STM32L431KCU6TR?
The device features VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode for low-power consumption.
- What analog peripherals are available on the STM32L431KCU6TR?
The device includes a 12-bit ADC, 12-bit DAC channels, an operational amplifier, and ultra-low-power comparators.
- What communication interfaces are supported by the STM32L431KCU6TR?
The device supports SAI, I2C, USARTs, LPUART, SPIs (including Quad SPI), CAN (2.0B Active), and SDMMC interface.
- How many capacitive sensing channels does the STM32L431KCU6TR support?
The device supports up to 21 capacitive sensing channels.
- What development tools are available for the STM32L431KCU6TR?
The device supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™ for development.
- What is the package type of the STM32L431KCU6TR?
The device is available in a UFQFPN 32 5x5x0.55 mm package.
- Is the STM32L431KCU6TR RoHS compliant?
Yes, the device is ECOPACK2® compliant and RoHS compliant.
