HT45F0027 datasheet(3/112 Pages) HOLTEK

3 / 112 page

Rev. 1.20

�an�a�� 21� 201�

Rev. 1.20

�an�a�� 21� 201�

HT45F0027

PIR 8-Bit Flash MCU

HT45F0027

PIR 8-Bit Flash MCU

EEPROM Data memory ................................................................................. 26

EEPROM Data Memo�� St��ct��e ........................................................................................ 2�

EEPROM Registe�s .............................................................................................................. 2�

Reading Data f�om the EEPROM ......................................................................................... 28

W�iting Data to the EEPROM................................................................................................ 28

W�ite P�otection..................................................................................................................... 28

EEPROM Inte��pt ................................................................................................................ 28

P�og�amming Conside�ations................................................................................................ 29

Oscillator ........................................................................................................ 30

Oscillato� Ove�view .............................................................................................................. 30

System Clock Configurations ............................................................................................... 30

Inte�nal RC Oscillato� – HIRC .............................................................................................. 31

Inte�nal 32kHz Oscillato� – LIRC .......................................................................................... 31

S�pplementa�� Oscillato�...................................................................................................... 31

Operating Modes and System Clocks ........................................................ 31

S�stem Clocks ..................................................................................................................... 31

S�stem Ope�ation Modes ..................................................................................................... 32

Cont�ol Registe� .................................................................................................................... 34

Ope�ating Mode Switching ................................................................................................... 35

Standb� C��ent Conside�ations .......................................................................................... 39

Wake-�p ............................................................................................................................... 39

Watchdog Timer............................................................................................. 40

Watchdog Time� Clock So��ce.............................................................................................. 40

Watchdog Time� Cont�ol Registe� ......................................................................................... 40

Watchdog Time� Ope�ation ................................................................................................... 41

Reset and Initialisation.................................................................................. 42

Reset F�nctions ................................................................................................................... 42

Reset Initial Conditions ......................................................................................................... 45

Input/Output Ports ........................................................................................ 47

P�ll-high Resisto�s ................................................................................................................ 47

Po�t A Wake-�p ..................................................................................................................... 48

I/O Po�t Cont�ol Registe�s..................................................................................................... 48

Pin-�emapping F�nction........................................................................................................ 49

I/O Pin St��ct��es.................................................................................................................. 50

P�og�amming Conside�ations ............................................................................................... 51

Timer/Event Counters ................................................................................... 51

Configuring the Timer/Event Counter Input Clock Source .................................................... 52

Time� Registe�s – TMR0� TMR1 ........................................................................................... 52

Time� Cont�ol Registe�s – TMR0C� TMR1C.......................................................................... 53

Time� Mode ........................................................................................................................... 54

Event Co�nte� Mode ............................................................................................................ 54

P�lse Width Capt��e Mode ................................................................................................... 55

I/O Inte�facing........................................................................................................................ 5�

P�og�amming Conside�ations................................................................................................ 5�

HT45F0027 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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