HT45F3W datasheet(3/167 Pages) HOLTEK

3 / 167 page

Rev. 1.50

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De�e��e� 01� �01�

Rev. 1.50

De�e��e� 01� �01�

HT45F3W

R-Type Blood Pressure Meter Flash MCU

HT45F3W

R-Type Blood Pressure Meter Flash MCU

P�og�a� Counte� Low Registe� – PCL ................................................................................. 3�

Look-up Ta�le Registe�s – TBLP� TBHP� TBLH .................................................................... 37

Status Registe� – STATUS ................................................................................................... 37

System Control Register............................................................................... 39

EEPROM Data memory ................................................................................. 41

EEPROM Data Me�o�y St�u�tu�e ........................................................................................ 41

EEPROM Registe�s .............................................................................................................. 41

Oscillators ...................................................................................................... 45

Os�illato� Ove�view .............................................................................................................. 45

System Clock Configurations ............................................................................................... 45

Exte�nal C�ystal/Ce�a�i� Os�illato� – HXT ........................................................................... 4�

Exte�nal RC Os�illato� – ERC .............................................................................................. 47

Inte�nal RC Os�illato� – HIRC .............................................................................................. 47

Exte�nal 3�.7�8kHz C�ystal Os�illato� – LXT........................................................................ 48

LXT Os�illato� Low Powe� Fun�tion ..................................................................................... 49

Inte�nal 3�kHz Os�illato� – LIRC .......................................................................................... 49

Supple�enta�y Os�illato�s ................................................................................................... 49

Operating Modes and System Clocks ........................................................ 50

Syste� Clo�ks ..................................................................................................................... 50

Syste� Ope�ation Modes ..................................................................................................... 5�

Cont�ol Registe� .................................................................................................................... 53

Fast Wake – up .................................................................................................................... 55

Ope�ating Mode Swit�hing ................................................................................................... 5�

Stand�y Cu��ent Conside�ations .......................................................................................... �0

Wake-up ............................................................................................................................... �0

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

Watchdog Timer............................................................................................. 62

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

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

Wat�hdog Ti�e� Ope�ation ................................................................................................... �3

Reset and Initialisation.................................................................................. 65

Reset Fun�tions ................................................................................................................... �5

Reset Initial Conditions ........................................................................................................ �7

Input/Output Ports ........................................................................................ 71

Pull-high Resisto�s ................................................................................................................ 71

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

I/O Po�t Cont�ol Registe�s..................................................................................................... 73

SCKO Fun�tion ..................................................................................................................... 74

I/O Pin St�u�tu�es.................................................................................................................. 74

P�og�a��ing Conside�ations ............................................................................................... 75

Timer Modules – TM ...................................................................................... 76

Int�odu�tion ........................................................................................................................... 7�

TM Ope�ation ........................................................................................................................ 7�

HT45F3W Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

HT45F3W Datasheet(HTML) 3 Page - Holtek Semiconductor Inc

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