HT45F3230 datasheet(3/148 Pages) HOLTEK

3 / 148 page

Rev. 1.00

January 13, 2017

Rev. 1.00

January 13, 2017

HT45F3230

IR Sensing/Motor Driving Flash MCU

HT45F3230

IR Sensing/Motor Driving Flash MCU

Special Function Register Description............................................................ 26

Indirect Addressing Register – IAR0, IAR1 ................................................................................26

Memory Pointers – MP0, MP1 ..................................................................................................26

Bank Pointer – BP .....................................................................................................................27

Accumulator – ACC....................................................................................................................27

Program Counter Low Register – PCL ......................................................................................27

Look-up Table Registers – TBLP, TBHP, TBLH .........................................................................28

Status Register – STATUS.........................................................................................................28

EEPROM Data memory ..................................................................................... 30

EEPROM Data Memory Structure .............................................................................................30

EEPROM Registers ...................................................................................................................30

Reading Data from the EEPROM ..............................................................................................32

Writing Data to the EEPROM.....................................................................................................32

Write Protection..........................................................................................................................32

EEPROM Interrupt .....................................................................................................................32

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

Oscillators .......................................................................................................... 34

Oscillator Overview ....................................................................................................................34

System Clock Configurations.....................................................................................................34

Internal RC Oscillator – HIRC ....................................................................................................35

Internal 32kHz Oscillator – LIRC................................................................................................35

Operating Modes and System Clocks ............................................................. 35

System Clocks ...........................................................................................................................35

System Operation Modes...........................................................................................................36

Control Register .........................................................................................................................38

Operating Mode Switching.........................................................................................................39

Standby Current Considerations ...............................................................................................43

Wake-up.....................................................................................................................................43

Watchdog Timer................................................................................................. 44

Watchdog Timer Clock Source...................................................................................................44

Watchdog Timer Control Register ..............................................................................................44

Watchdog Timer Operation ........................................................................................................45

Reset and Initialisation...................................................................................... 46

Reset Functions .........................................................................................................................46

Reset Initial Conditions ..............................................................................................................48

Input/Output Ports............................................................................................. 51

Pull-high Resistors .....................................................................................................................51

Port A Wake-up ..........................................................................................................................52

I/O Port Control Registers..........................................................................................................52

Pin-shared Functions .................................................................................................................53

I/O Pin Structures.......................................................................................................................57

Programming Considerations ....................................................................................................57

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