Product Features

• CPU Features

  • Operating voltage

  ♦ fSYS= 8MHz: 2.2V~5.5V

  ♦ fSYS=12MHz: 2.7V~5.5V

  ♦ fSYS=20MHz: 4.5V~5.5V

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

  • Power down and wake-up functions to reduce power consumption

  • Oscillator type

  ♦ External High Speed Crystal – HXT

  ♦ External 32.768kHz Crystal – LXT

  ♦ Internal High Speed RC – HIRC

  ♦ Internal 32kHz RC – LIRC

  • Fully integrated internal 8/12/16 MHz oscillator requires no external components

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

  • All instructions executed in one to two instruction cycles

  • Table read instructions

  • 61 powerful instructions

  • 8-level subroutine nesting

  • Bit manipulation instruction

• Peripheral Features

  • Program Memory: Up to 4K×16

  • Data Memory: Up to 256×8

  • True EEPROM Memory: Up to 128×8

  • Watchdog Timer function

  • Up to 26 bidirectional I/O lines

  • Two external interrupt lines shared with I/O pins

  • Multiple Timer Modules for time measure, input capture, compare match output, PWM output  function or single pulse output function

  • Serial Interfaces Module – SIM for SPI or I2 C

  • Software controlled 6-SCOM/SSEG and 18-SSEG lines LCD driver with 1/3 bias

  • Programmable I/O port source current for LED applications

  • Dual Time-Base functions for generation of fixed time interrupt signals

  • 8-channel 12-bit resolution A/D converter

  • One Comparator function – available in HT66F0185

  • Fully-duplex Universal Asynchronous Receiver and Transmitter Interface – UART, available in  HT66F0185

  • Low voltage reset function

  • Low voltage detect function

  • Flash program memory can be re-programmed up to 10,000 times

  • Flash program memory data retention > 10 years

  • True EEPROM data memory can be re-programmed up to 100,000 times

  • True EEPROM data memory data retention > 10 years

  • Wide range of available package types