Abstract This guide systematically catalogs mainstream MCU series across the embedded landscape, drawing on official product information from STMicroelectronics, NXP Semiconductors, Espressif Systems, Raspberry Pi, Microchip Technology, and Texas Instruments.

Introduction Choosing between an 8-bit MCU and a 32-bit MCU is not only a technical decision. It also affects component cost, firmware development, sourcing stability, alternative part options, inventory planning,