The STC15L101W is a 8-pin MCU from STC’s low-power life series which supports 8051 core instruction set. This SOP-8-pin RoHS compliant unit offers 256 bytes of internal RAM, 2K bytes of flash memory, an on-board oscillator, 3 analog channels, and 6 programmable I/O ports. This controller also supports several hardware functions such as watchdog timer, ROM/RAM banking, an 8-bit timer/counter, programmable serial port, A/D converter, PWM module, and interrupt controller. It supports communication protocols such as UART, SPI, and I2C. This unit is suitable for use in applications such as medical, security, and peripheral/consumer devices.