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HT66FU50 Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT66FU50 Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
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3 / 259 page  Special Function Register Description ...........................................34 Indirect Addressing Registers - IAR0, IAR1....................................34 Memory Pointers - MP0, MP1...............................................................................34 Bank Pointer - BP.................................................................................................35 Accumulator - ACC...............................................................................................36 Program Counter Low Register - PCL ..................................................................36 Look-up Table Registers - TBLP, TBHP, TBLH......................................................36 Status Register - STATUS ....................................................................................36 EEPROM Data Memory .....................................................................38 EEPROM Data Memory Structure ........................................................................38 EEPROM Registers..............................................................................................38 Reading Data from the EEPROM .........................................................................40 Writing Data to the EEPROM ...............................................................................40 Write Protection ....................................................................................................41 EEPROM Interrupt ...............................................................................................41 Programming Considerations ...............................................................................41 Oscillator............................................................................................42 Oscillator Overview...............................................................................................42 System Clock Configurations................................................................................42 External Crystal/ Ceramic Oscillator - HXT ...........................................................43 External RC Oscillator - ERC................................................................................43 Internal RC Oscillator - HIRC................................................................................43 External 32.768kHz Crystal Oscillator - LXT .........................................................43 LXT Oscillator Low Power Function ......................................................................44 Internal 32kHz Oscillator - LIRC ...........................................................................44 Supplementary Oscillators....................................................................................44 Operating Modes and System Clocks .............................................45 System Clocks......................................................................................................45 System Operation Modes .....................................................................................46 Control Register ...................................................................................................47 Fast Wake-up .......................................................................................................48 Operating Mode Switching and Wake-up..............................................................49 NORMAL Mode to SLOW Mode Switching...........................................................49 SLOW Mode to NORMAL Mode Switching...........................................................50 Entering the SLEEP0 Mode..................................................................................50 Entering the SLEEP1 Mode..................................................................................51 Entering the IDLE0 Mode .....................................................................................51 Entering the IDLE1 Mode .....................................................................................51 Standby Current Considerations...........................................................................51 Wake-up...............................................................................................................52 Programming Considerations ...............................................................................52 Contents Rev. 1.50 3 March 15, 2011 |
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