HT66FB30/HT66FB40/HT66FB50/HT66FB60 -- Enhanced A/D Flash Type 8-Bit MCU with EEPROM & USB Interface

　　Features

　　MCU Features

　　Operating Voltage:

　　fSYS=8MHz: 2.2V~5.5V

　　fSYS=12MHz: 2.7V~5.5V

　　fSYS=20MHz: 4.5V~5.5V

　　Up to 0.2us instruction cycle with 20MHz system clock at VDD=5V

　　Power down and wake-up functions to reduce power consumption

　　Five oscillators

　　-- External High Speed Xtal

　　-- External 32.768kHz Xtal

　　-- External RC

　　-- Internal High Speed -- no ext. components

　　-- Internal 32kHz -- no ext. components

　　Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP

　　Fully integrated internal 4MHz, 8MHz and 12MHz oscillator requires no external components

　　All instructions executed in one or two instruction cycles

　　Table read instructions

　　63 powerful instructions

　　Up to 8 subroutine nesting levels

　　Bit manipulation instruction