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

Analog feature includes a multi-channel 10-bit A/D converter. A single extremely flexible Timer/Event Counter provides timing, event counting and pulse wide capture functions. A Pulse Width Modulator provides an 8-bit PWM output. An internal Watchdog Timer coupled with excellent noise immunity and ESD protection ensures that reliable operation is maintained in hostile electrical environments.

A full choice of internal high and low speed oscillators are provided and the two fully integrated system oscillators require no external components for their implementation. The ability to operate and switch dynamically between a range of operating modes using different clock sources gives users the ability to optimize microcontroller operation and minimize power consumption.

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

CPU Features

• Operating voltage: fSYS =8MHz: 1.8V~5.5V
• Up to 0.5μs instruction cycle with 8MHz system clock at VDD =5V
• Power down and wake-up functions to reduce power consumption
• Oscillator types
  • - Internal High Speed RC – HIRC
  • - Internal Low Speed 32kHz RC – LIRC
• Multi-mode operation: FAST, SLOW, IDLE and SLEEP
• Fully integrated internal oscillators require no external components
• All instructions executed in one or two instruction cycles
• Table read instructions
• 63 powerful instructions
• Up to 4-level subroutine nesting
• Bit manipulation instruction

Peripheral Features

• Flash Program Memory: 1K×14~2K×14
• RAM Data Memory: 64×8
• Emulated EEPROM Memory: 32×14
• Watchdog Timer function
• Up to 18 bidirectional I/O lines
• Programmable I/O source current for LED applications (for HT66F0041 only)
• Up to 2 pin-shared external interrupts
• One 8-bit programmable Timer/Event Counter with overflow interrupt and prescaler
• 1-channel 8-bit PWM output shared with I/O line (HT66F0021/HT66F0031)
• 8-bit PWM complementary outputs shared with I/O lines (HT66F0041)
• Single Time-Base function for generation of fixed time interrupt signals
• 4 external channels 10-bit resolution A/D converter with internal reference voltage VVR
• Low voltage reset function
• Package types: 8-pin SOP, 16/20-pin NSOP and 20-pin SSOP

Specification:

• max. frequency: 8MHz
• VDD: 1.8V~5.5V
• program memory: 1Kx14
• data memory: 64x8
• data EEPROM: 32x14
• stack: 2
• I/O: 14
• timer: 8-bitx1
• ADC: 10-bitx4
• PWM: 8-bitx1
• case: 16NSOP