HT45FM2C datasheet(3/171 Pages) HOLTEK

3 / 171 page

Rev. 1.10

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Rev. 1.10

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HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

HT45FM2C

Brushless DC Motor Flash Type 8-Bit MCU

Preliminar�

EEPROM Data Memory.................................................................................. 31

EEPRO� Data �emor� Structure ........................................................................................ �1

EEPRO� Registers .............................................................................................................. �1

Reading Data from the EEPRO� ......................................................................................... ��

Writing Data to the EEPRO�................................................................................................ ��

Write Protection..................................................................................................................... ��

EEPRO� Interrupt ................................................................................................................ ��

Programming Consideration ................................................................................................. ��

Programming Examples........................................................................................................ �4

Oscillator ........................................................................................................ 35

Oscillator Overview ............................................................................................................... �5

System Clock Configurations................................................................................................ �5

Internal �0�Hz RC Oscillator – HIRC................................................................................... �6

Internal ��kHz Oscillator – LIRC........................................................................................... �6

Supplementar� Clocks .......................................................................................................... �6

Operating Modes and System Clocks ......................................................... 37

S�stem Clocks ...................................................................................................................... �7

S�stem Operation �odes...................................................................................................... �9

Control Register .................................................................................................................... 40

Fast Wake-up ........................................................................................................................ 41

Operating �ode Switching and Wake-up.............................................................................. 4�

NOR�AL �ode to SLOW �ode Switching ........................................................................... 4�

SLOW �ode to NOR�AL �ode Switching ........................................................................... 4�

Entering the SLEEP �ode .................................................................................................... 45

Entering the IDLE0 �ode...................................................................................................... 45

Entering the IDLE1 �ode...................................................................................................... 45

Standb� Current Considerations ........................................................................................... 46

Wake-up ................................................................................................................................ 46

Watchdog Timer............................................................................................. 47

Watchdog Timer Clock Source.............................................................................................. 47

Watchdog Timer Control Register ......................................................................................... 47

Watchdog Timer Operation ................................................................................................... 48

Reset and Initialisation.................................................................................. 49

Reset Functions .................................................................................................................... 49

Reset Initial Conditions ......................................................................................................... 51

Input/Output Ports ......................................................................................... 55

Pull-high Resistors ................................................................................................................ 55

Port A Wake-up ..................................................................................................................... 56

I/O Port Control Registers ..................................................................................................... 56

I/O Pin Structures.................................................................................................................. 58

Programming Considerations................................................................................................ 59

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