HT45F4MA datasheet(3/145 Pages) HOLTEK

3 / 145 page

Rev. 1.20

De�e��e� 1�� 201�

Rev. 1.20

De�e��e� 1�� 201�

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

HT45F4MA/HT45FH4MA/HT45FH4MA-1

Power Bank Flash MCU

Special Function Register Description........................................................ 27

Indi�e�t Add�essing Registe�s – IAR0� IAR1 ......................................................................... 27

Me�o�y Pointe�s – MP0� MP1 .............................................................................................. 27

Bank Pointe� – BP................................................................................................................. 28

A��u�ulato� – ACC............................................................................................................... 28

P�og�a� Counte� Low Registe� – PCL.................................................................................. 28

Look-up Ta�le Registe�s – TBLP� TBHP� TBLH..................................................................... 28

Status Registe� – STATUS.................................................................................................... 29

EEPROM Data Memory.................................................................................. 31

EEPROM Data Me�o�y St�u�tu�e ........................................................................................ 31

EEPROM Registe�s .............................................................................................................. 31

Reading Data f�o� the EEPROM ........................................................................................ 33

W�iting Data to the EEPROM................................................................................................ 33

W�ite P�ote�tion..................................................................................................................... 33

EEPROM Inte��upt ................................................................................................................ 33

P�og�a��ing Conside�ations................................................................................................ 3�

Oscillator ........................................................................................................ 35

Os�illato� Ove�view ............................................................................................................... 35

System Clock Configurations................................................................................................ 35

Inte�nal RC Os�illato� – HIRC ............................................................................................... 3�

Inte�nal 32kHz Os�illato� – LIRC........................................................................................... 3�

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

Syste� Clo�ks ...................................................................................................................... 3�

Syste� Ope�ation Modes...................................................................................................... 37

Cont�ol Registe� .................................................................................................................... 39

Ope�ating Mode Swit�hing.................................................................................................... �1

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

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

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

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

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

Wat�hdog Ti�e� Ope�ation ................................................................................................... �7

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

Reset Fun�tions .................................................................................................................... �8

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

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

Pull-high Resisto�s ................................................................................................................ 5�

Po�t A Wake-up ..................................................................................................................... 55

I/O Po�t Cont�ol Registe�s..................................................................................................... 55

I/O Pin St�u�tu�es.................................................................................................................. 5�

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

HT45F4MA Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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