HT69F240 datasheet(3/172 Pages) HOLTEK

3 / 172 page

Rev. 1.20

�a�� 2�� 201�

Rev. 1.20

�a�� 2�� 201�

HT69F240

I/O 8-Bit Flash MCU with LED/LCD Driver

HT69F240

I/O 8-Bit Flash MCU with LED/LCD Driver

W�ite P�ote�tion..................................................................................................................... 30

EEPRO� Inte��upt ................................................................................................................ 30

P�og�amming Conside�ations................................................................................................ 31

Oscillator ........................................................................................................ 32

Os�illato� Ove�view ............................................................................................................... 32

System Clock Configurations................................................................................................ 32

Exte�nal C�ystal/Ce�ami� Os�illato� – HXT ........................................................................... 33

Inte�nal RC Os�illato� – HIRC ............................................................................................... 33

Exte�nal 32.768kHz C�ystal Os�illato� – LXT........................................................................ 34

LXT Os�illato� Low Powe� Fun�tion ...................................................................................... 3�

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

Supplementa�y Os�illato�s .................................................................................................... 3�

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

System Clo�k ........................................................................................................................ 36

System Ope�ation �odes...................................................................................................... 37

Cont�ol Registe� .................................................................................................................... 38

Fast Wake-up........................................................................................................................ 40

Ope�ating �ode Swit��ing.................................................................................................... 41

NOR�AL �ode to SLOW �ode Swit��ing........................................................................... 42

SLOW �ode to NOR�AL �ode Swit��ing........................................................................... 43

Ente�ing t�e SLEEP0 �ode .................................................................................................. 44

Ente�ing t�e SLEEP1 �ode .................................................................................................. 44

Ente�ing t�e IDLE0 �ode...................................................................................................... 44

Ente�ing t�e IDLE1 �ode...................................................................................................... 4�

Standby Cu��ent Conside�ations........................................................................................... 4�

Wake-up................................................................................................................................ 46

P�og�amming Conside�ations................................................................................................ 46

Watchdog Timer............................................................................................. 47

Wat��dog Time� Clo�k Sou��e.............................................................................................. 47

Wat��dog Time� Cont�ol Registe� ......................................................................................... 47

Wat��dog Time� Ope�ation ................................................................................................... 48

Reset and Initialisation.................................................................................. 49

Reset Fun�tions .................................................................................................................... 49

Reset Initial Conditions ......................................................................................................... �2

Input/Output Ports......................................................................................... 55

I/O Po�t Registe� List............................................................................................................. ��

Pull-�ig� Resisto�s ................................................................................................................ �6

Po�t A Wake-up ..................................................................................................................... �6

I/O Po�t Cont�ol Registe�s..................................................................................................... �6

Pin-s�a�ed Fun�tions ............................................................................................................ �6

I/O Pin St�u�tu�es.................................................................................................................. 60

I/O Sou��e Cu��ent Sele�tion ................................................................................................ 60

P�og�amming Conside�ations................................................................................................ 62

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