The Holtek HT66FM5240 is a Microcontroller Unit (MCU/MPU/SOC) with 4KB 256Byte FLASH, 26 RISC, and SSOP-28-150mil. This MCU is manufactured by Holtek and is also RoHS compliant. The HT66FM5240 is designed for applications requiring low cost, high performance, and high integration, such as personal electronics, home applications, and healthcare products. It features advanced features such as high-speed serial communication and various system protection measures. In addition, it supports various software development platforms, making it convenient to develop applications for the HT66FM5240.