The HT66F0176 device is a Flash Memory A/D type 8-bit high performance RISC architecture microcontroller. Offering users the convenience of Flash Memory multi-programming features, the device also includes a wide range of functions and features. Other memory includes an area of RAM Data Memory as well as an area of true 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 and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Communication with the outside world is catered for by including fully integrated SPI, I2C, and UART interface functions, popular interfaces which provide designers with a means of easy communication with external peripheral hardware.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 external, internal high and low oscillators 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 device 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 =16MHz: 3.3V~5.5V
• Up to 0.25us instruction cycle with 16MHz system clock at VDD =5V
• Power down and wake-up functions to reduce power consumption
• Oscillator types:
  • - External High Speed Crystal -- HXT
  • - External 32.768kHz Crystal -- LXT
  • - Internal High Speed RC -- HIRC
  • - Internal Low Speed 32kHz RC -- LIRC
• Multi-mode operation: FAST, SLOW, IDLE and SLEEP
• Fully integrated internal 8/12/16MHz oscillator requires no external components
• All instructions executed in one or two instruction cycles
• Table read instructions
• 63 powerful instructions
• 8-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 2Kx16
• RAM Data Memory: 128x8
• True EEPROM Memory: 64x8
• Watchdog Timer function
• 22 bidirectional I/O lines
• Two pin-shared external interrupts
• Dual Timer Modules for time measurement, compare match output or PWM output function
• Serial Interface Module -- SIM for SPI or I2C
• Software controlled 6-SCOM/SSEG and 14-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-external channel 12-bit resolution A/D converter
• Fully-duplex Universal Asynchronous Receiver and Transmitter Interface -- UART
• Low voltage reset function
• Low voltage detect function
• Package types: 16/20-pin NSOP, 24-pin SOP/SSOP

Specification:

• max. frequency: 20MHz
• VDD: 2.2V~5.5V
• program memory: 2Kx16
• data memory: 128x8
• data EEPROM: 64x8
• stack: 8
• I/O: 22
• timer: 10-bit PTM×2
• ADC: 12-bitx8
• interface: SPI/I²C×1, UARTx1
• case: 24SSOP