The HT66F003 is Flash Memory type 8-bit high performance RISC architecture microcontroller. Offering users the convenience of Flash Memory multi-programming
CPU Features Operating Voltage: fSYS=8MHz: 2.2V~5.5V fSYS=12MHz: 2.7V~5.5V fSYS=12MHz: 3.3V~5.5V fSYS=20MHz: 4.5V~5.5V Up to 0.2us instruction cycle with 20MHz system