Guide Explains How to Choose STM32 Cortex-M Microcontrollers for Robotics Control

A chapter from the STATERA Library's Compute and AI Architecture series examines STM32 Cortex-M microcontrollers for robotic electrical architectures. It argues that selecting an MCU involves more than picking the highest clock speed, requiring consideration of control timing, peripherals, memory, power, functional safety, and scalability. The MCU is positioned as a deterministic control layer beneath high-performance AI computers such as Jetson or edge PCs, which handle perception and planning. The text outlines how different Cortex-M families suit different roles, from low-cost distributed I/O nodes to motor control and high-performance domain controllers. It concludes that MCU selection should be based on worst-case real-time workloads rather than average CPU utilization.