HT46R0664 datasheet(3/92 Pages) HOLTEK

3 / 92 page

Rev. 1.00

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Rev. 1.00

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HT46R0664

Enhanced A/D+LCD 8-Bit OTP MCU

System Clock Configurations................................................................................................ �7

External Crystal/Resonator Oscillator – HXT........................................................................ �7

External RC Oscillator – ERC ............................................................................................... �8

Internal RC Oscillator – HIRC ............................................................................................... �8

External 3�768Hz Crystal Oscillator – LXT........................................................................... �8

LXT Oscillator Low Power F�nction ...................................................................................... �9

Internal Low Speed Oscillator – LIRC................................................................................... �9

Operating Modes .......................................................................................... 30

Mode Types and Selection.................................................................................................... 30

Operatin� Mode Control........................................................................................................ 30

Mode Switchin�..................................................................................................................... 31

Standby C�rrent Considerations........................................................................................... 31

Wake-�p................................................................................................................................ 31

Watchdog Timer............................................................................................. 33

Watchdo� Timer Clock So�rce.............................................................................................. 33

Watchdo� Timer Control Re�ister ......................................................................................... 33

Watchdo� Timer Operation ................................................................................................... 34

Reset and Initialisation.................................................................................. 36

Reset F�nctions .................................................................................................................... 36

Reset Initial Conditions ......................................................................................................... 39

Input/Output Ports......................................................................................... 41

P�ll-hi�h Resistors ................................................................................................................ 41

Port � Wake-�p ..................................................................................................................... 41

I/O Port Control Re�isters..................................................................................................... 4�

Pin-shared F�nctions ............................................................................................................ 4�

Pin Remapping Configuration ............................................................................................... 43

I/O Pin Str�ct�res.................................................................................................................. 43

Pro�rammin� Considerations................................................................................................ 44

Timer/Event Counter ..................................................................................... 45

Configuring the Timer/Event Counter Input Clock Source .................................................... 45

Timer Re�isters – TMR0� TMR1 ........................................................................................... 46

Timer Control Re�isters – TMR0C� TMR1C.......................................................................... 46

Timer Mode ........................................................................................................................... 48

Event Co�nter Mode ............................................................................................................. 49

P�lse Width Capt�re Mode ................................................................................................... 49

Prescaler............................................................................................................................... 50

PFD F�nction ........................................................................................................................ 51

I/O Interfacin�........................................................................................................................ 51

Pro�rammin� Considerations................................................................................................ 51

Timer Pro�ram Example ....................................................................................................... 5�

Pulse Width Modulator.................................................................................. 53

PWM Operation..................................................................................................................... 53

6+� PWM Mode .................................................................................................................... 54

HT46R0664 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc

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