STM32L431VCI6

STM32L431VCI6 is a low‑power MCU from ST’s STM32L4 family. It uses a 32‑bit ARM Cortex‑M4 core with DSP and FPU, optimized for energy‑efficient, battery-powered apps. Core speed is up to around 80 MHz, and it supports multiple low‑power modes with fast wakeup.
Memory and I/O: Flash and RAM are variant‑dependent (the L431 family generally offers hundreds of KB of Flash and tens of KB of RAM). The “CI6” suffix indicates a specific 48‑pin LQFP package and I/O count.
Peripherals: broad mix including timers, DMA, multiple 12‑bit ADCs, op‑amps, RTC, USB FS, I2C, SPI, USART/UART, CAN, cryptography accelerators and RNG, plus optional LCD controller on some devices.
Development: supported by STM32CubeMX and HAL/LL drivers; programmed via ST‑LINK. For exact specs (memory size, peripheral set) consult the datasheet and reference manual for your exact device variant. Suitable for wearables, sensors, portable medical/industrial applications that need a balance of performance and ultra‑low power.

Key features of STM32L431VCI6 (highlights; exact numbers depend on package variant):
- Core: ARM Cortex-M4F, 32-bit, with FPU and DSP, up to 80 MHz
- Memory: up to 256 KB Flash and up to 64 KB RAM (package-dependent)
- Power/voltage: 1.65–3.6 V operation; ultra-low-power with multiple sleep/standby modes; VBAT domain for RTC
- Flash/acceleration: ART Accelerator for fast code fetch
- USB: USB 2.0 Full-Speed device
- Peripherals: multiple timers; I2C, SPI, USART/LPUART; 12-bit ADC (up to 16 channels)
- Security/crypto: AES hardware crypto accelerator; true random number generator
- Debug/trace: SWD/JTAG
- Temperature range: industrial (-40°C to 85°C)
Note: exact memory sizes and peripheral counts can vary by exact package/variant.

- Pin count: 100 pins (LQFP-100 package; variant CI6 indicates this package).
- Function: STM32L431VCI6 is a 32‑bit ARM Cortex‑M4 microcontroller from the STM32L4 family, designed for low‑power embedded control with on‑chip flash RAM and a rich set of peripherals (GPIOs, timers, ADC/DAC, and common communication interfaces).

- Manufacturer: STMicroelectronics (ST)
- What kind of company: A multinational semiconductor and electronics company (headquartered in Geneva, Switzerland) that designs, manufactures, and markets a wide range of semiconductor devices, including microcontrollers (STM32), sensors, and power-management ICs for automotive, industrial, and consumer markets.

STM32L431VCI6 is an ultra-low-power ARM Cortex-M4 MCU. Typical application areas:
- Battery-powered wearables and medical devices (long battery life)
- Sensor nodes, data loggers, and environmental/industrial monitoring
- IoT endpoints and smart-home/industrial automation controllers
- Energy/metering, power monitoring and sub-metering systems
- Portable handheld instruments and LCD-based devices
- Small consumer electronics requiring low power and efficient performance
These use cases leverage its low power, adequate performance, and peripherals for compact, energy-efficient designs.

LQFP-64 (64‑pin Low-Profile Quad Flat Package).