Overview
The STM32L431RCI6 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, which operates at a frequency of up to 80 MHz and includes a Floating Point Unit (FPU) for single-precision data processing. The Cortex-M4 core also features a full set of DSP instructions and a Memory Protection Unit (MPU) to enhance application security.
The STM32L431RCI6 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 available in several package options, including UFBGA 64, which is used for the STM32L431RCI6 model.
Key Specifications
| Parameter | Specification |
|---|---|
| Core | Arm® 32-bit Cortex®-M4 CPU with FPU, up to 80 MHz |
| Memory | Up to 256 KB Flash, 64 KB 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 |
| Power Consumption | 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, 84 µA/MHz run mode |
| Timers | 1x 32-bit, 5x 16-bit (including 1 advanced motor-control timer), 2x low-power 16-bit timers, 2x watchdogs, SysTick timer |
| Analog Peripherals | 1x 12-bit ADC 5 Msps, 2x 12-bit DAC output channels, 1x operational amplifier, 2x ultra-low-power comparators |
| Communication Interfaces | 3x I2C, 4x USART, 1x LPUART, 3x SPI, 1x Quad SPI, CAN (2.0B Active), SDMMC interface |
| Package | UFBGA 64 5x5x0.6 P 0.5 mm |
Key Features
- Ultra-low-power with FlexPowerControl
- Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator™), frequency up to 80 MHz
- Memory Protection Unit (MPU) and DSP instructions
- Up to 256 KB Flash memory and 64 KB SRAM
- Quad SPI memory interface
- Rich analog peripherals: 12-bit ADC, 12-bit DAC, operational amplifier, ultra-low-power comparators
- Multiple communication interfaces: I2C, USART, SPI, CAN, SDMMC
- Low-power modes: VBAT mode, Shutdown mode, Standby mode, Stop 2 mode
- Fast wakeup from Stop mode (4 µs)
- Brown out reset (BOR) and interconnect matrix
- Up to 21 capacitive sensing channels
- RTC with HW calendar, alarms, and calibration
- 14-channel DMA controller, true random number generator, CRC calculation unit, 96-bit unique ID
Applications
The STM32L431RCI6 is suitable for a wide range of applications that require low power consumption and high performance. These include:
- Industrial automation and control systems
- Medical devices and healthcare equipment
- Consumer electronics, such as smart home devices and wearables
- Automotive systems, including infotainment and driver assistance
- IoT devices and smart sensors
- Energy metering and smart grid applications
Q & A
- What is the core architecture of the STM32L431RCI6?
The STM32L431RCI6 is based on the Arm® 32-bit Cortex®-M4 CPU with a Floating Point Unit (FPU).
- What is the maximum operating frequency of the STM32L431RCI6?
The maximum operating frequency is up to 80 MHz.
- What are the power consumption modes available in the STM32L431RCI6?
The device offers several low-power modes including VBAT mode, Shutdown mode, Standby mode, and Stop 2 mode.
- What types of memory does the STM32L431RCI6 have?
The device has up to 256 KB Flash memory and 64 KB SRAM.
- What are the key analog peripherals of the STM32L431RCI6?
The device features a 12-bit ADC, 12-bit DAC output channels, an operational amplifier, and ultra-low-power comparators.
- What communication interfaces are available on the STM32L431RCI6?
The device includes I2C, USART, SPI, Quad SPI, CAN (2.0B Active), and SDMMC interfaces.
- What is the package type for the STM32L431RCI6?
The package type is UFBGA 64 5x5x0.6 P 0.5 mm.
- What is the temperature range for the STM32L431RCI6?
The device operates in the -40 °C to 85/105/125 °C temperature range.
- Does the STM32L431RCI6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What is the purpose of the RTC in the STM32L431RCI6?
The RTC includes a hardware calendar, alarms, and calibration.
- Are there any security features in the STM32L431RCI6?
Yes, the device includes a Memory Protection Unit (MPU) and various protection mechanisms for embedded Flash memory and SRAM.
