The series of devices are Flash Memory A/D type 8-bit high performance RISC architecture microcontroller. Offering users the convenience of Flash Memory multi-programming features, these devices also include a wide range of functions and features. Other memory includes an area of RAMData Memory as well as an area of True EEPROM memory for storage of non-volatile data such as serial numbers, calibratuib data, etc.

Analog features include a multi-channel 12-bit A/D converter and a comparator functions. Multiple andextremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Protective features such as an internal Watchdog Timer, Low Voltage Reset and Low Voltage Detector coupled with excellent noise immunity and ESD protection ensure that reliable operation is maintained in hostile electrical environments. A full choice of HXT, LXT, HIRC and LIRC oscillator functions are provided including a fully integrated system oscillator which requires no external components for its implementation. The ability to operate and switch dynamically between a range of operating modes using different clock sources gives users the ability to optimise microcontroller operation and minimize power consumption.

The inclusion of flexible I/O programming features, Time-Base functions along with many other features ensure that the devices will find excellent use in applications such as electronic metering, environmental monitoring, handheld instruments, household appliances, electronically controlled tools, motor driving in addition to many others.

CPU Features

• Operating voltage
  • fSYS = 8MHz: 2.2V~5.5V
  • fSYS =12MHz: 2.7V~5.5V
  • fSYS =20MHz: 4.5V~5.5V
• Up to 0.2us 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
• 63 powerful instructions
• 8-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Program Memory: Up to 4Kx16
• Data Memory: Up to 256x8
• True EEPROM Memory: Up to 128x8
• 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 I2C
• 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 inHT66F0185
• 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

Specification:

• max. frequency: 20MHz
• VDD: 2.2V~5.5V
• program memory: 4Kx16
• data memory: 256x8
• data EEPROM: 128x8
• stack: 8
• I/O: 26
• timer: 10-bit PTM×1, 16-bit CTM×1, 16-bit STM×1
• ADC: 12-bitx8
• interface: SPI/I²C×1, UARTx1
• case: 24SOP