HT45F43 datasheet(4/152 Pages) HOLTEK

4 / 152 page

Reset and Initialisation .....................................................................52

Reset Functions ...................................................................................................52

Reset Initial Conditions .........................................................................................54

Input/Output Ports.............................................................................57

Pull-high Resistors................................................................................................57

Port A Wake-up ....................................................................................................58

I/O Port Control Registers.....................................................................................58

Port B NMOS Open Drain Control Register ..........................................................59

I/O Pin Structures .................................................................................................59

Programming Considerations ...............................................................................60

Timer/Event Counters .......................................................................61

Configuring the Timer/Event Counter Input Clock Source .....................................61

Timer Registers

- TMR0, TMR1L, TMR1H...........................................................61

Timer Control Registers

- TMR0C, TMR1C..........................................................63

Configuring the Timer Mode .................................................................................63

Configuring the Event Counter Mode....................................................................64

Configuring the Pulse Width Measurement Mode.................................................64

Programmable Frequency Divider

- PFD .............................................................65

Prescaler ..............................................................................................................66

I/O Interfacing.......................................................................................................68

Timer/Event Counter Pins Internal Filter ...............................................................68

Programming Considerations ...............................................................................68

Timer Program Example.......................................................................................69

Pulse Width Modulator .....................................................................70

PWM Operation....................................................................................................70

6+2 PWM Mode ...................................................................................................71

7+1 PWM Mode ...................................................................................................72

PWM Output Control ............................................................................................73

Analog to Digital Converter..............................................................74

A/D Overview .......................................................................................................74

A/D Converter Register Description ......................................................................74

A/D Converter Data Registers

- ADRL, ADRH.....................................................75

A/D Converter Control Registers

- ADCR, ACSR, ADPCR ..................................75

A/D Operation.......................................................................................................77

A/D Input Pins ......................................................................................................78

Summary of A/D Conversion Steps ......................................................................79

Programming Considerations ...............................................................................79

A/D Transfer Function...........................................................................................80

A/D Programming Example ..................................................................................81

Serial Interface Module

- SIM...........................................................82

SPI Interface.........................................................................................................82

SPI Registers .......................................................................................................83

Rev. 1.20

September 15, 2011

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HT45F43 Datasheet(PDF) 4 Page - Holtek Semiconductor Inc

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