HT46RS03/HT46RS03E/HTRS03P/HT46RS03PE series MCU are 8-bit high-performance reduced instruction set (RISC) microcontrollers, operating voltage of 2.2V~5.5V, with 2K×15 OTP program space and 128×8 data space. The series MCUs integrate 3 operational amplifiers, one of which has a gain control function, and a comparator, with corresponding interrupt function open.