HT45F3520 datasheet(3/134 Pages) HOLTEK

3 / 134 page

Rev. 1.10

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Rev. 1.10

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HT45F3520/HT45F3530

Personal Care Flash MCU

HT45F3520/HT45F3530

Personal Care Flash MCU

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

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

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

Reading Data f�o� the EEPROM ........................................................................................ �4

W�iting Data to the EEPROM................................................................................................ �4

W�ite P�ote�tion..................................................................................................................... �4

EEPROM Inte��upt ................................................................................................................ �4

P�og�a��ing Conside�ations................................................................................................ �5

Oscillators ...................................................................................................... 36

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

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

High Speed Inte�nal RC Os�illato� – HIRC ........................................................................... �7

Inte�nal ��kHz Os�illato� – LIRC........................................................................................... �7

Supple�enta�y Os�illato�...................................................................................................... �7

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

Syste� Clo�ks ...................................................................................................................... �8

Syste� Ope�ating Modes...................................................................................................... �9

Cont�ol Registe� .................................................................................................................... 40

Ope�ating Mode Swit�hing ................................................................................................... 41

Stand�y Cu��ent Conside�ations........................................................................................... 44

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

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

Wat�hdog Ti�e� Clo�k Sou��e.............................................................................................. 4�

Wat�hdog Ti�e� Cont�ol Registe� ......................................................................................... 4�

Wat�hdog Ti�e� Ope�ation ................................................................................................... 47

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

Reset Fun�tions .................................................................................................................... 48

Reset Initial Conditions ......................................................................................................... 50

Input/Output Ports......................................................................................... 54

Pull-high Resisto�s ................................................................................................................ 54

Po�t A Wake-up ..................................................................................................................... 5�

I/O Po�t Cont�ol Registe�s..................................................................................................... 5�

Pin-sha�ed Fun�tions ............................................................................................................ 57

I/O Po�t Sou��e Cu��ent Cont�ol – only fo� HT45F�5�0........................................................ �1

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

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

Timer Module – TM ........................................................................................ 64

Int�odu�tion ........................................................................................................................... �4

TM Ope�ation ........................................................................................................................ �4

TM Clo�k Sou��e................................................................................................................... �4

TM Inte��upts......................................................................................................................... �4

TM Exte�nal Pins................................................................................................................... �5

TM Input/Output Pin Sele�tion ............................................................................................. �5

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

HT45F3520 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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