HT45F12(2012) データシートの表示（PDF） - Holtek Semiconductor

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HT45F12
(Rev.:2012)

8-Bit Flash MCU with Op Amps & Comparators

Holtek Semiconductor 

HT45F12

8-Bit Flash MCU with Op Amps & Comparators

EEPROM Data Memory................................................................................... 29

EEPROM Data Memory Structure......................................................................................... 29

EEPROM Registers............................................................................................................... 29

Reading Data from the EEPROM.......................................................................................... 31

Writing Data to the EEPROM................................................................................................. 31

Write Protection...................................................................................................................... 31

EEPROM Interrupt................................................................................................................. 31

Programming Considerations................................................................................................. 32

Oscillator ........................................................................................................ 33

Oscillator Overview................................................................................................................ 33

System Clock Configurations................................................................................................. 33

External Crystal/Ceramic Oscillator – HXT............................................................................ 34

External RC Oscillator – ERC................................................................................................ 35

External Oscillator – EC......................................................................................................... 35

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

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

Operating Modes and System Clocks ......................................................... 36

System Clocks....................................................................................................................... 36

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

Control Register..................................................................................................................... 39

Fast Wake-up......................................................................................................................... 40

Operating Mode Switching and Wake-up............................................................................... 41

SLOW Mode to NORMAL Mode Switching............................................................................ 43

Entering the SLEEP0 Mode................................................................................................... 43

Entering the SLEEP1 Mode................................................................................................... 43

Entering the IDLE0 Mode....................................................................................................... 43

Entering the IDLE1 Mode....................................................................................................... 44

Standby Current Considerations............................................................................................ 44

Wake-up................................................................................................................................. 44

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

Watchdog Timer Clock Source............................................................................................... 45

Watchdog Timer Control Register.......................................................................................... 45

Watchdog Timer Operation.................................................................................................... 46

Reset and Initialisation................................................................................... 48

Reset Functions..................................................................................................................... 48

Reset Initial Conditions.......................................................................................................... 50

Input/Output Ports.......................................................................................... 52

Pull-high Resistors................................................................................................................. 52

Port A Wake-up...................................................................................................................... 53

I/O Port Control Registers...................................................................................................... 54

I/O Pin Structures................................................................................................................... 55

Programming Considerations................................................................................................. 56

Rev. 0.00

3

September 26, 2012

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