The STM32F091CBT6: The Cortex-M0 is a von Neumann, single-cycle core designed for low gate count and low power — it lacks a hardware multiplier pipeline and a memory protection unit, so it is best suited for control loops, sensor polling, and protocol bridging rather than DSP or multitasking OS workloads. The 48 MHz ceiling is enough to handle a CAN node with a few analog inputs and a PWM output without breaking a sweat. Program memory is 128 KB of on-chip Flash, and the SRAM is 32 KB — enough for moderate application code plus a FreeRTOS heap if you keep the task count lean.
Peripherals and connectivity — CAN, analog, and serial interfaces
Package and temperature grade — 48-LQFP, -40 to 85°C
Housed in a 48-pin LQFP package (7x7 mm body), the STM32F091CBT6 exposes 38 general-purpose I/Os.