Overview
The STM32L431VCI6 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, operating at a frequency of up to 80 MHz. The Cortex-M4 core includes a Floating Point Unit (FPU) that supports all Arm® single-precision data-processing instructions and data types, as well as a full set of DSP instructions and a Memory Protection Unit (MPU) for enhanced application security.
The STM32L431VCI6 features high-speed memories, including up to 256 KB of single-bank Flash memory and 64 KB of SRAM, with 16 KB of SRAM having hardware parity check. It also includes a Quad SPI flash memory interface and an extensive range of enhanced I/Os and peripherals connected to multiple buses.
The device is designed for low-power applications, offering various power-saving modes and a wide temperature range of -40 to +85 °C (or up to +125 °C junction temperature). It supports independent power supplies for analog components and features a VBAT input for backing up the RTC and backup registers.
Key Specifications
| Specification | Value |
|---|---|
| Core | Arm® Cortex®-M4 32-bit RISC core with FPU |
| Frequency | Up to 80 MHz |
| Flash Memory | Up to 256 KB single bank |
| 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 °C (or up to +125 °C junction temperature) |
| ADC | 1x 12-bit ADC, 5 Msps |
| DAC | 2x 12-bit DAC output channels |
| Timers | 1x 32-bit, 5x 16-bit (including advanced motor control and low-power timers) |
| Communication Interfaces | 3x SPI, 3x I2C, 4x USART, 1x LPUART, 1x CAN (2.0B Active), 1x SDMMC |
| Capacitive Sensing Channels | Up to 21 channels |
| Package Options | LQFP64, UFBGA64, and others |
Key Features
- Ultra-low-power with FlexPowerControl, including multiple power-saving modes (Shutdown, Standby, Stop 2) and low current consumption (e.g., 200 nA in VBAT mode, 8 nA in Shutdown mode).
- High-performance Arm® Cortex®-M4 core with FPU, supporting DSP instructions and an MPU for enhanced security.
- Rich analog peripherals, including a 12-bit ADC, two 12-bit DAC channels, an operational amplifier, and two ultra-low-power comparators.
- Extensive communication interfaces, such as SPI, I2C, USART, LPUART, CAN, and SDMMC.
- Support for capacitive sensing with up to 21 channels.
- Multiple timer options, including a 32-bit timer and several 16-bit timers, including advanced motor control and low-power timers.
- Independent power supplies for analog components and a VBAT input for RTC and backup register backup.
- Development support with serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
Applications
- Low-power IoT devices and smart sensors.
- Industrial automation and control systems.
- Medical devices requiring low power consumption and high performance.
- Automotive systems, especially those needing advanced motor control and low-power operation.
- Consumer electronics, such as wearables and portable devices, that require efficient power management.
- Smart home devices and building automation systems.
Q & A
- What is the core architecture of the STM32L431VCI6?
The STM32L431VCI6 is based on the Arm® Cortex®-M4 32-bit RISC core with a Floating Point Unit (FPU).
- What is the maximum frequency of the STM32L431VCI6?
The maximum frequency is up to 80 MHz.
- How much Flash and SRAM memory does the STM32L431VCI6 have?
It has up to 256 KB of single-bank Flash memory and 64 KB of SRAM, with 16 KB of SRAM having hardware parity check.
- What is the power supply range for the STM32L431VCI6?
The power supply range is from 1.71 V to 3.6 V.
- What are the temperature ranges supported by the STM32L431VCI6?
The device operates in the -40 to +85 °C (or up to +125 °C junction temperature) range.
- What types of communication interfaces are available on the STM32L431VCI6?
The device features SPI, I2C, USART, LPUART, CAN (2.0B Active), and SDMMC interfaces.
- Does the STM32L431VCI6 support capacitive sensing?
Yes, it supports up to 21 capacitive sensing channels.
- What are the power-saving modes available on the STM32L431VCI6?
The device offers Shutdown, Standby, and Stop 2 power-saving modes, among others.
- How does the STM32L431VCI6 support development and debugging?
It supports serial wire debug (SWD), JTAG, and Embedded Trace Macrocell™.
- What are some typical applications for the STM32L431VCI6?
Typical applications include low-power IoT devices, industrial automation, medical devices, automotive systems, and consumer electronics.
