BUY P89C668HBA https://www.utsource.net/itm/p/11730901.html

Description: 8-bit Flash Microcontroller Features: 8K Bytes of In-System Reprogrammable Flash Memory Fully Static Operation: 0 Hz to 24 MHz Three-level Program Memory Lock 256 x 8-bit Internal RAM 32 Programmable I/O Lines Two 16-bit Timer/Counters Six Interrupt Sources Programmable Serial Channel for Full Duplex UART or 8-bit/16-bit Timer with PWM On-chip Analog Comparator On-chip Oscillator and Clock Circuit Applications: Automotive Home Appliances Industrial Control Consumer Electronics Power Supplies Security Systems Medical Devices (For reference only)