HT48R006 datasheet(3/72 Pages) HOLTEK

3 / 72 page

System Control Registers

- CTRL0, CTRL1.........................................................20

Wake-up Function Register

- PAWK ....................................................................20

Pull-high Registers

- PAPU ..................................................................................20

Oscillator............................................................................................22

System Oscillator Overview.............................................................................................................22

System Clock Configurations................................................................................22

External Crystal/Resonator Oscillator

- HXT ........................................................22

External RC Oscillator

- ERC...............................................................................22

Internal RC Oscillator

- HIRC...............................................................................23

External 32768Hz Crystal Oscillator

- LXT...........................................................23

LXT Oscillator Low Power Function ......................................................................23

Internal Low Speed Oscillator

- LIRC...................................................................23

Operating Modes ...............................................................................24

Mode Types and Selection ...................................................................................24

Mode Switching ....................................................................................................24

Standby Current Considerations...........................................................................25

Wake-up...............................................................................................................25

Watchdog Timer ................................................................................26

Watchdog Timer Operation...................................................................................26

Reset and Initialisation .....................................................................27

Reset Functions ...................................................................................................27

Reset Initial Conditions .........................................................................................28

HT46R006............................................................................................................29

HT48R006............................................................................................................30

Input/Output Ports.............................................................................31

Pull-high Resistors................................................................................................31

Port A Wake-up ....................................................................................................31

I/O Port Control Registers.....................................................................................32

Pin-shared Functions............................................................................................32

I/O Pin Structures .................................................................................................34

Programming Considerations ...............................................................................34

Timer/Event Counters .......................................................................34

Configuring the Timer/Event Counter Input Clock Source .....................................34

Timer Registers

- TMR0, TMR1 ...........................................................................34

Timer Control Registers

- TMR0C, TMR1C..........................................................38

Timer Mode ..........................................................................................................38

Event Counter Mode.............................................................................................38

Pulse Width Capture Mode...................................................................................39

Prescaler ..............................................................................................................40

Buzzer Function -- HT48R006 ..............................................................................40

PFD Function -- HT46R006 ..................................................................................41

I/O Interfacing.......................................................................................................41

HT48R006/HT46R006

Rev. 1.00

iii

October 24, 2011

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