The HT66F0176 is a Holtek 8-bit microcontroller integrated circuit, manufactured by Holtek and packaged in a SOP-16_150mil RoHS package. It is a low-power, low-voltage CMOS microcontroller featuring an 8-bit Harvard RISC CPU, 32-bit data bus, and 1024 x 8-bit on-chip Flash memory. The device also includes an 8-bit 8051-compatible timer, 8-bit PWM, UARTs, I2C communication, watchdog timer, power-down control, and a host of parallel/serial I/O functions. The design of the HT66F0176 has a wide range of applications, including industrial control, consumer electronics, and transportation control.