BUY HT2844 https://www.utsource.net/itm/p/4504705.html
4-Sound Generator
Description: The HT2844 is a low voltage, low power, high-speed CMOS 8-bit microcontroller with an internal 8K ROM and 128 bytes RAM. Features: 8K ROM 128 bytes RAM 8-bit CPU 8-bit I/O ports 8-bit timer/counter 8-bit A/D converter On-chip oscillator Low voltage operation Low power consumption Applications: Automotive Home appliances Industrial control Security systems Medical equipment Telecommunications (For reference only)