HT66F0174 View Datasheet(PDF) - Holtek Semiconductor

Part Name

Description

Manufacturer

HT66F0174

Enhanced A/D Flash 8-Bit MCU

Holtek Semiconductor 

HT66F0172/HT66F0174

Enhanced A/D Flash 8-Bit MCU

EEPROM Data Memory (only for HT66F0174).............................................. 28

EEPROM Data Memory Structure......................................................................................... 28

EEPROM Registers............................................................................................................... 28

Reading Data from the EEPROM ......................................................................................... 30

Writing Data to the EEPROM................................................................................................. 30

Write Protection...................................................................................................................... 30

EEPROM Interrupt................................................................................................................. 30

Programming Considerations................................................................................................. 31

Oscillator......................................................................................................... 32

Oscillator Overview................................................................................................................ 32

System Clock Configurations................................................................................................. 32

External Crystal/Ceramic Oscillator – HXT............................................................................ 33

Internal RC Oscillator – HIRC................................................................................................ 34

External 32.768kHz Crystal Oscillator – LXT......................................................................... 34

LXT Oscillator Low Power Function....................................................................................... 35

Internal 32kHz Oscillator – LIRC............................................................................................ 35

Supplementary Clocks........................................................................................................... 35

Operating Modes and System Clocks.......................................................... 36

System Clocks....................................................................................................................... 36

System Operation Modes....................................................................................................... 37

Control Register..................................................................................................................... 38

Fast Wake-up......................................................................................................................... 40

Operating Mode Switching .................................................................................................... 40

NORMAL Mode to SLOW Mode Switching............................................................................ 41

SLOW Mode to NORMAL Mode Switching ........................................................................... 41

Entering the SLEEP0 Mode................................................................................................... 43

Entering the SLEEP1 Mode................................................................................................... 43

Entering the IDLE0 Mode....................................................................................................... 43

Entering the IDLE1 Mode....................................................................................................... 44

Standby Current Considerations............................................................................................ 44

Wake-up................................................................................................................................ 45

Programming Considerations................................................................................................. 45

Watchdog Timer.............................................................................................. 46

Watchdog Timer Clock Source............................................................................................... 46

Watchdog Timer Control Register.......................................................................................... 46

Watchdog Timer Operation.................................................................................................... 47

Reset and Initialisation................................................................................... 48

Reset Functions..................................................................................................................... 48

Reset Initial Conditions.......................................................................................................... 51

Rev. 1.00

3

July 11, 2013

Share Link: