ARM Cortex-M4 at 80 MHz with 1 MB Flash — DSP and control in one chip
The STM32L471VGT6TR is an ARM Cortex-M4 32-Bit MCU at 80 MHz with 1 MB Flash and 128K x 8 SRAM. It integrates a 12-bit ADC with 16 channels, a 12-bit DAC with two channels, and peripherals including CANbus, QSPI, SAI, and multiple I²C/SPI/UART interfaces.
80 MHz Cortex-M4 with FPU — real-time DSP headroom
The ARM Cortex-M4 core includes a single-precision floating-point unit that accelerates FFTs, filter loops, and control algorithms without a separate DSP. At 80 MHz, the part can handle real-time motor control loops, audio processing pipelines, and sensor fusion tasks that would bog down a Cortex-M3. The 1 MB Flash and 128 KB SRAM provide enough code and data space for moderately complex firmware stacks, including FreeRTOS or a bare-metal scheduler with multiple interrupt-driven peripherals.
The wide supply range down to 1.71 V lets the MCU run directly from a single Li-ion cell through most of its discharge curve, eliminating a boost regulator in many portable designs. Brown-out detect and a programmable watchdog are included on-chip for reliable operation in noisy or battery-powered systems.
100-LQFP package — 82 I/O in a manageable footprint
The 100-pin LQFP (14x14 mm body) offers 82 usable I/O lines, enough for a parallel LCD data bus, external memory interface (EBI/EMI), and multiple serial peripherals without multiplexing. The package is hand-solderable and rework-friendly, which matters for prototyping and low-volume production.
Active lifecycle — no near-term LTB risk
STMicroelectronics lists the STM32L471VGT6TR as Active (current product). There is no announced last-time-buy or end-of-life notice. For production programs requiring multi-year supply assurance, this part carries no imminent obsolescence risk.