Arm Cortex M series: Features, architecture, comparison and an example of processing

Arm Cortex M series processor architecture

The Arm Cortex-M processor architecture is a family of 32-bit RISC (Reduced Instruction Set Computer) processor cores designed by Arm Holdings, optimized for low-power, cost-sensitive, and real-time embedded applications. These processors are widely used in microcontrollers (MCUs), IoT devices, sensors, automotive systems, and consumer electronics. The Cortex-M series includes several variants, such as Cortex-M0, M0+, M3, M4, M7, M23, M33, M35P, M55, and M85, each tailored to specific performance, power, and feature requirements. Below is a detailed explanation of the Cortex-M architecture, covering its key components, features, and variants.

Pic Source: STMicroelectronics (Leading maker of processor and microcontroller chips based on ARM Cortex processor cores)

Overview of Cortex-M Architecture

The Cortex-M processors are based on the ARMv6-M (M0, M0+), ARMv7-...