HT45F75 datasheet(3/190 Pages) HOLTEK

3 / 190 page

Rev. 1.10

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Rev. 1.10

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HT45F75

Body Fat Scale Flash MCU

HT45F75

Body Fat Scale Flash MCU

EEPROM Data memory ..................................................................................... 38

EEPROM Data Me�o�y St�u�tu�e .............................................................................................38

EEPROM Registe�s ...................................................................................................................38

Reading Data f�o� the EEPROM ..............................................................................................�0

W�iting Data to the EEPROM.....................................................................................................�0

W�ite P�ote�tion..........................................................................................................................�0

EEPROM Inte��upt .....................................................................................................................�0

P�og�a��ing Conside�ations.....................................................................................................�1

Oscillators .......................................................................................................... 42

Os�illato� Ove�view ...................................................................................................................��

System Clock Configurations.....................................................................................................��

Exte�nal C�ystal/Ce�a�i� Os�illato� – HXT ...............................................................................�3

Inte�nal RC Os�illato� – HIRC ....................................................................................................��

Inte�nal 3�kHz Os�illato� – LIRC ...............................................................................................��

Exte�nal 3�.7�8kHz C�ystal Os�illato� – LXT ............................................................................��

Supple�enta�y Os�illato�s ........................................................................................................��

Operating Modes and System Clocks ............................................................. 46

Syste� Clo�ks ...........................................................................................................................��

Syste� Ope�ation Modes ..........................................................................................................�8

Cont�ol Registe� .........................................................................................................................�9

Fast Wake-up.............................................................................................................................51

Ope�ating Mode Swit�hing ........................................................................................................51

Stand�y Cu��ent Conside�ations ...............................................................................................5�

Wake-up ....................................................................................................................................5�

P�og�a��ing Conside�ations ....................................................................................................57

Watchdog Timer................................................................................................. 57

Wat�hdog Ti�e� Clo�k Sou��e...................................................................................................57

Wat�hdog Ti�e� Cont�ol Registe� ..............................................................................................57

Wat�hdog Ti�e� Ope�ation ........................................................................................................59

Reset and Initialisation ..................................................................................... 60

Reset Fun�tions .........................................................................................................................�0

Reset Initial Conditions .............................................................................................................�3

Input/Output Ports ............................................................................................ 66

Pull-high Resisto�s .....................................................................................................................��

Po�t A Wake-up ..........................................................................................................................�7

I/O Po�t Cont�ol Registe�s..........................................................................................................�8

I/O Po�t Sou��e Cu��ent Cont�ol.................................................................................................�9

I/O Pin St�u�tu�es.......................................................................................................................70

P�og�a��ing Conside�ations.....................................................................................................70

Timer Modules – TM .......................................................................................... 71

Int�odu�tion ................................................................................................................................71

TM Ope�ation .............................................................................................................................71

TM Clo�k Sou��e........................................................................................................................71

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