Holtek Semiconductor HT66F4550
This series of devices are Flash Memory A/D type 8-bit high performance RISC architecture microcontrollers. With regard to internal timers, these devices include multiple and extremely flexible Timer Modules providing functions for timing, pulse generation and PWM generation operations.FEATURES
CPUFEATURES
● Operating Voltage: ♦ fSYS=4MHz: 2.2V~5.5V ♦ fSYS=8MHz: 2.2V~5.5V ♦ fSYS=12MHz: 2.7V~5.5V● Up to 0.33μs instruction cycle with 12MHz system clock at VDD=5V
● Power down and wake-up functions to reduce power consumption
● Oscillator types: ♦ External High Speed Crystal – HXT ♦ Internal High Speed RC – HIRC ♦ External Low Speed 32.768kHz Crystal – LXT ♦ Internal Low Speed 32kHz RC – LIRC
● Multi-mode operation: FAST, SLOW, IDLE and SLEEP
● Fully integrated internal 2MHz, 4MHz and 8MHz oscillator requires no external components
● All instructions executed in 1~3 instruction cycles
● Table read instructions
● 115 powerful instructions
● Up to 16-level subroutine nesting
● Bit manipulation instruction Peripheral
FEATURES
● Program Memory: 2K×16~16K×16● Data Memory: 128×8~512×8
● True EEPROM Memory: 32×8~128×8
● Watchdog Timer function
● Up to 46 bidirectional I/O lines
● Two external interrupt lines shared with I/O pins
● Two operational amplifiers, two comparators...