HT68F13 datasheet(3/161 Pages) HOLTEK

3 / 161 page

Special Function Register Description ...........................................24

Indirect Addressing Registers

- IAR0, IAR1..........................................................24

Memory Pointers

- MP0, MP1..............................................................................24

Accumulator

- ACC..............................................................................................25

Program Counter Low Register

- PCL..................................................................25

Look-up Table Registers

- TBLP, TBHP, TBLH.....................................................25

Status Register

- STATUS ...................................................................................25

Oscillator............................................................................................27

Oscillator Overview...............................................................................................27

System Clock Configurations................................................................................27

External Crystal/ Ceramic Oscillator

- HXT ..........................................................28

External RC Oscillator

- ERC...............................................................................29

Internal RC Oscillator

- HIRC...............................................................................29

Internal 32kHz Oscillator

- LIRC...........................................................................29

Supplementary Oscillator......................................................................................29

Operating Modes and System Clocks .............................................30

System Clocks......................................................................................................30

System Operation Modes .....................................................................................30

Control Register ...................................................................................................32

Fast Wake-up .......................................................................................................33

Operating Mode Switching ...............................................................34

NORMAL Mode to SLOW Mode Switching...........................................................35

SLOW Mode to NORMAL Mode Switching...........................................................36

Entering the SLEEP0 Mode................................................................................37

Entering the SLEEP1 Mode..................................................................................37

Entering the IDLE0 Mode .....................................................................................37

Entering the IDLE1 Mode .....................................................................................38

Standby Current Considerations...........................................................................38

Wake-up...............................................................................................................38

Programming Considerations ...............................................................................39

Watchdog Timer ................................................................................39

Watchdog Timer Clock Source .............................................................................39

Watchdog Timer Control Register.........................................................................40

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

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

Reset Functions ...................................................................................................42

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

Rev. 1.10

February 9, 2011

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