The devices are 8-bit high performance RISC architecture microcontroller, designed especially for applications that interface directly to analog signals, such as those from sensor. Offering users the convenience of Flash Memory multi-programming features, this 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 EEPROM memory for storage of non-volatile data such as serial numbers, calibration data etc.

Analog features include a multi-channel 12-bit A/D converter. Multiple and extremely flexible Timer Modules provide timing, pulse generation and PWM generation functions. Communication with the outside world catered for by including fully integrated SPI, I2C and UART interface functions, three 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 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 device will find excellent use in applications such as sensor signal processing, chargers, motor driving, industrial control, consumer product, subsystem controller, etc.

CPU Features

• Operating Voltage
  • fSYS = 8MHz: 2.2V~5.5V
  • fSYS = 10MHz: 2.7V~5.5V
  • fSYS = 12MHz: 3.3V~5.5V
  • fSYS = 16MHz: 4.5V~5.5V
• Up to 0.25μs instruction cycle with 16MHz system clock at VDD =5V
• Power down and wake-up functions to reduce power consumption
• Four Oscillators:
  • - External High Frequency Crystal -- HXT
  • - External 32.768kHz Crystal-- LXT
  • - Internal High Frequency RC -- HIRC
  • - Internal 32kHz -- LIRC
• Fully intergrated internal 8MHz oscillator requires no external components
• Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
• All instructions executed in one to three instruction cycles
• Table read instructions
• 115 powerful instructions
• 8-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 8Kx16 (HT66F489)/4Kx16 (HT66F488)
• RAM Data Memory: 384x8
• True EEPROM Memory: 64x8
• Watchdog Timer function
• 30 bidirectional I/O lines
• LED driver
• 1/3 Bias Software LCD
• Serial Interface Module -- SIM for SPI or I2C
• UART Function
• Six pin-shared external interrupts
• Multiple Timer Module for time measure, input capture, compare match output, PWM output function or single pulse output function
• Dual Time-Base functions for generation of fixed time interrupt signals
• 8-channel 12-bit resolution A/D converter
• Low voltage reset function
• Low voltage detector function
• Package: 28-pin SOP/SSOP

Specification:

• max. frequency: 16MHz
• VDD: 2.2V~5.5V
• program memory: 8Kx16
• data memory: 384x8
• data EEPROM: 64x8
• stack: 8
• I/O: 26
• ADC: 12-bitx8
• timer: 10-bit CTM×1, 16-bit STM×1, 10-bit PTM×2
• interface: SPI/I²C×1, UART×1
• case: 28SOP