STM32L431VCI6 — ultra-low-power Cortex-M4 with 256 KB Flash
The STMicroelectronics STM32L431VCI6 is a 32-bit ARM Cortex-M4 MCU from the STM32L4 series, clocked at 80 MHz with 256 KB of Flash program memory and 64 KB of SRAM. It packs 83 I/O lines and a rich set of serial interfaces including CAN, I²C, SPI, UART/USART, and QSPI, plus dual 12-bit DAC and a 16-channel 12-bit ADC. The 100-UFBGA package (7x7 mm) keeps board footprint small, while the 1.71 V to 3.6 V supply range and -40°C to 85°C operating temperature make it a fit for industrial sensors, portable instrumentation, and motor-control nodes that need both compute and power efficiency.
80 MHz Cortex-M4 — what it means for your control loop
The 80 MHz core with single-cycle multiply-and-accumulate handles sensor fusion and real-time control loops without an external DSP. For a motor-control or data-acquisition task, that speed leaves headroom for the RTOS scheduler and communications stack alongside the main algorithm.
256 KB Flash and 64 KB SRAM — firmware sizing
256 KB of Flash is enough for a bootloader plus a full application with a modest RTOS, a TCP/IP stack, and a field-update image staging area. The 64 KB SRAM supports moderate data buffering — think a CANopen object dictionary or a few kilobytes of sensor log — without external memory.
Industrial temperature range and supply flexibility
Operates from -40°C to 85°C. Supply range is 1.71 V to 3.6 V.
100-UFBGA — rework and layout notes
100-UFBGA (7x7 mm) package. Surface mount.