HT45F39 datasheet(3/102 Pages) HOLTEK

3 / 102 page

Rev. 1.10

July 01, 2016

Rev. 1.10

July 01, 2016

HT45F39/HT45F391

Ultrasonic Distance Measurement 8-bit Flash MCU

HT45F39/HT45F391

Ultrasonic Distance Measurement 8-bit Flash MCU

Oscillators and Operating Modes ................................................................ 32

Internal High Speed Oscillator – HIRC.................................................................................. 32

Internal Low Speed Oscillator – LIRC................................................................................... 32

System Operation Modes...................................................................................................... 32

Standby Current Considerations........................................................................................... 33

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

Programming Considerations................................................................................................ 33

Watchdog Timer............................................................................................. 34

Watchdog Timer Clock Source.............................................................................................. 34

Watchdog Timer Control Register ......................................................................................... 34

Watchdog Timer Operation ................................................................................................... 35

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

Reset Overview..................................................................................................................... 36

Reset Functions .................................................................................................................... 36

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

Input/Output Ports ........................................................................................ 42

I/O Register List .................................................................................................................... 42

Pull-high Resistors ................................................................................................................ 42

Port A Wake-up ..................................................................................................................... 43

I/O Port Control Registers..................................................................................................... 43

I/O Pin Structures.................................................................................................................. 43

Programming Considerations................................................................................................ 44

Timer Modules – TM ...................................................................................... 45

Introduction ........................................................................................................................... 45

TM Operation ........................................................................................................................ 46

TM Clock Source................................................................................................................... 46

TM Interrupts......................................................................................................................... 46

TM External Pins................................................................................................................... 46

Programming Considerations................................................................................................ 47

Compact Type TM – CTM .............................................................................. 48

Compact TM Operation......................................................................................................... 48

Compact Type TM Register Description................................................................................ 49

Compact Type TM Operating Modes .................................................................................... 52

Compare Match Output Mode............................................................................................... 52

Timer/Counter Mode ............................................................................................................. 55

PWM Output Mode................................................................................................................ 55

Operational Amplifiers .................................................................................. 58

Switch-Capacitor Filter – SCF............................................................................................... 58

A/D Converter................................................................................................. 59

A/D Overview ........................................................................................................................ 59

A/D Converter Register Description...................................................................................... 59

A/D Converter Data Register – ADR..................................................................................... 60

A/D Converter Conterl Registers – ADCR0, ADCR1, ACERL............................................... 60

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