HT46R47 is an integrated circuit from Holtek that is a monolithic 8-bit microcontroller with 8K flash memory, 6-bit A/D, RS232 port and full I/O ports. It is based on the 8051 architecture and is suitable for a variety of applications such as home automation, industrial control and consumer applications such as toys and gaming devices. The chip offers built-in features such as 9 PWM output ports, 16bit timer/counter, clock/calendar, liquid crystal display (LCD) controller/driver, standard I/O ports, external interrupt and more. It is also equipped with 32-level hardware stack and has a maximum clock frequency of 20MHz.