HT66F007 datasheet(3/131 Pages) HOLTEK

3 / 131 page

Rev. 1.41

April 11, 2017

Rev. 1.41

April 11, 2017

HT66F007/HT66F008

Cost-Effective A/D Flash MCU with EEPROM

HT66F007/HT66F008

Cost-Effective A/D Flash MCU with EEPROM

Reading Data from the EEPROM ........................................................................................ 29

Writing Data to the EEPROM................................................................................................ 29

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

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

Programming Considerations................................................................................................ 30

Programming Examples........................................................................................................ 30

Oscillators ...................................................................................................... 32

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

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

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

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

Internal 32kHz Oscillator – LIRC........................................................................................... 34

Supplementary Oscillator...................................................................................................... 34

Operating Modes and System Clocks ......................................................... 35

System Clocks ...................................................................................................................... 35

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

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

Fast Wake-up........................................................................................................................ 39

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

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

Wake-up................................................................................................................................ 44

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

Input/Output Ports......................................................................................... 53

Pull-high Resistors ................................................................................................................ 53

Port A Wake-up ..................................................................................................................... 54

I/O Port Control Registers..................................................................................................... 54

Special Pin Control................................................................................................................ 55

Pin-remapping Functions ...................................................................................................... 55

I/O Pin Structures.................................................................................................................. 57

Programming Considerations................................................................................................ 58

Timer Modules – TM ...................................................................................... 59

Introduction ........................................................................................................................... 59

TM Operation ........................................................................................................................ 59

TM Clock Source................................................................................................................... 60

TM Interrupts......................................................................................................................... 60

TM External Pins................................................................................................................... 60

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