ASM31LX003 is a TSSOP-20 RoHS (Reach of Hazardous Substances) compliant processor and microcontroller (MCU) manufactured by Sine Microelectronics. It is an 8-bit low-power single-chip MCU incorporating embedded Flash memory, an 8-bit CPU core, and peripheral functions such as a real-time clock (RTC) and counter. It is able to perform a variety of tasks efficiently by using various features, such as high-speed interrupt processing, DMA transfer, and multiple-clock support. Additionally, system design is simplified by having on-chip oscillator, power-on reset, and a safe reset circuit. It is suitable for applications involving consumer, industrial, communications, and automotive systems.