BUY W86C551 https://www.utsource.net/itm/p/1731888.html
UNIVERSAL ASYNCHRONOUS RECEIVER /TRANSMITTER
Manufacturer: Winbond Description: W86C551 is a single-chip microcontroller with a built-in 8-bit microprocessor core. It is designed to provide a low-cost solution for embedded control applications. Features: 8-bit microprocessor core On-chip ROM, RAM, and I/O Up to 8K bytes of program memory Up to 512 bytes of RAM Up to 32 I/O lines Up to 8 external interrupts Up to 8 timer/counters Up to 8 serial ports Up to 4 PWM outputs On-chip oscillator Low power consumption Applications: Automotive Industrial control Home appliances Security systems Robotics Medical equipment Office automation (For reference only)