HT66F002 datasheet(3/144 Pages) HOLTEK

3 / 144 page

Rev. 1.71

April 11, 2017

Rev. 1.71

April 11, 2017

HT66F002/HT66F0025/HT66F003/HT66F004

Cost-Effective A/D Flash MCU with EEPROM

HT66F002/HT66F0025/HT66F003/HT66F004

Cost-Effective A/D Flash MCU with EEPROM

EEPROM Data Memory.................................................................................. 32

EEPROM Data Memory Structure ........................................................................................ 32

EEPROM Registers .............................................................................................................. 33

Reading Data from the EEPROM ........................................................................................ 34

Writing Data to the EEPROM................................................................................................ 35

Write Protection..................................................................................................................... 35

EEPROM Interrupt ................................................................................................................ 35

Programming Considerations................................................................................................ 36

Oscillator ........................................................................................................ 37

Oscillator Overview ............................................................................................................... 37

System Clock Configurations................................................................................................ 37

Internal RC Oscillator – HIRC ............................................................................................... 38

Internal 32kHz Oscillator – LIRC........................................................................................... 38

Supplementary Oscillator...................................................................................................... 38

Operating Modes and System Clocks ......................................................... 38

System Clocks ...................................................................................................................... 38

System Operation Modes...................................................................................................... 39

Control Register .................................................................................................................... 40

Operating Mode Switching.................................................................................................... 42

NORMAL Mode to SLOW Mode Switching........................................................................... 43

SLOW Mode to NORMAL Mode Switching .......................................................................... 44

Entering the SLEEP0 Mode .................................................................................................. 44

Entering the SLEEP1 Mode .................................................................................................. 45

Entering the IDLE0 Mode...................................................................................................... 45

Entering the IDLE1 Mode...................................................................................................... 45

Standby Current Considerations........................................................................................... 46

Wake-up................................................................................................................................ 46

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

Watchdog Timer Clock Source.............................................................................................. 47

Watchdog Timer Control Register ......................................................................................... 47

Watchdog Timer Operation ................................................................................................... 48

Reset and Initialisation.................................................................................. 49

Reset Functions .................................................................................................................... 50

Reset Initial Conditions ......................................................................................................... 53

Input/Output Ports......................................................................................... 56

Pull-high Resistors ................................................................................................................ 57

Port A Wake-up ..................................................................................................................... 58

I/O Port Control Registers..................................................................................................... 58

Pin-shared Functions ............................................................................................................ 59

I/O Pin Structures.................................................................................................................. 64

System Clock output pin CLO............................................................................................... 65

Programming Considerations................................................................................................ 65

HT66F002 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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