BUY DS89C21TM https://www.utsource.net/itm/p/11244448.html

The DS89C21TM is a high-performance 8-bit microcontroller with a 16-bit core. It features a 16-bit instruction set, 8K bytes of on-chip Flash memory, and 256 bytes of RAM. Features: rn 16-bit core rn 8K bytes of on-chip Flash memory rn 256 bytes of RAM rn 8-bit I/O ports rn On-chip oscillator rn On-chip power-on reset rn On-chip watchdog timer rn On-chip interrupt controller rn On-chip serial port Applications: rn Automotive rn Industrial rn Consumer rn Medical rn Networking rn Robotics (For reference only)