HT66F0042 is Flash Memory type 8-bit high performance RISC architecture microcontrollers. 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 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.

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
Three Oscillators
– Internal RC — HIRC
– Internal 32kHz RC — LIRC
– External 32.768kHz Crystal — LXT
Fully intergrated internal 8/12/16MHz oscillator requires no external components
Multi-mode operation: NORMAL, SLOW, IDLE and SLEEP
All instructions executed in one or two instruction cycles
Table read instructions
63 powerful instructions
Up to 6-level subroutine nesting
Bit manipulation instruction

Peripheral Features

Flash Program Memory: 2Kx15/4Kx16
RAM Data Memory: 96×8/128×8
True EEPROM Memory: 32×8/64×8
Watchdog Timer function
Up to 26 bidirectional I/O lines
Software controlled 4-SCOM lines LCD driver with 1/2 bias
Two pin-shared external interrupts
Multiple Timer Modules for time measure, compare match output, capture input, PWM output, single pulse output functions
Dual Time-Base functions for generation of fixed time interrupt signals
Multi-channel 12-bit resolution A/D converter
Serial Interface Module — SPI or I2C
Full-duplex Universal Asynchronous Receiver and Transmitter Interface — UART (HT66F0082 only)
Programmable I/O port source current for LED driving applications
Low voltage reset function
Flash program memory can be re-programmed up to 100,000 times
Flash program memory data retention > 10 years
True EEPROM data memory can be re-programmed up to 1,000,000 times
True EEPROM data memory data retention > 10 years
Wide range of available package types