BUY P89C51RD2BA https://www.utsource.net/itm/p/11243926.html

Description: 8-bit microcontroller with 8K/128K/256K Flash, 2K/4K/8K RAM, 10-bit ADC, UART, SPI, I2C, and I2S Features: 8K/128K/256K bytes of Flash program memory 2K/4K/8K bytes of RAM 10-bit A/D converter UART, SPI, I2C, and I2S serial interfaces On-chip oscillator and clock circuitry Low-power idle and power-down modes Multiple interrupt sources Programmable counter array Low-power CMOS technology 8-bit CPU Applications: Industrial control Home appliances Automotive Consumer electronics Security systems Medical equipment Robotics (For reference only)