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HT48R064B Datasheet(PDF) 3 Page - Holtek Semiconductor Inc |
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HT48R064B Datasheet(HTML) 3 Page - Holtek Semiconductor Inc |
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3 / 84 page  Special Function Registers ..............................................................15 Indirect Addressing Registers - IAR0, IAR1 .........................................................15 Memory Pointers - MP0, MP1..............................................................................15 Accumulator - ACC..............................................................................................17 Program Counter Low Register - PCL..................................................................17 Status Register - STATUS ...................................................................................17 Input/Output Ports and Control Registers .............................................................18 System Control Registers - CTRL0, CTRL1, CTRL2............................................18 Wake-up Function Register - PAWK ....................................................................20 Pull-high Registers - PAPU, PBPU, PCPU, PDPU, PEPU, PFPU........................20 Software COM Register - SCOMC.......................................................................20 Oscillator............................................................................................20 System Oscillator Overview..................................................................................20 System Clock Configurations................................................................................20 External Crystal/Resonator Oscillator - HXT ........................................................20 External RC Oscillator - ERC...............................................................................20 Internal RC Oscillator - HIRC...............................................................................21 External 32768Hz Crystal Oscillator - LXT...........................................................21 LXT Oscillator Low Power Function ......................................................................21 Internal Low Speed Oscillator - LIRC...................................................................22 Operating Modes ...............................................................................22 Mode Types and Selection ...................................................................................22 Mode Switching ....................................................................................................22 Standby Current Considerations...........................................................................23 Wake-up...............................................................................................................23 Watchdog Timer ................................................................................23 Watchdog Timer Operation...................................................................................23 Reset and Initialisation .....................................................................25 Reset Functions ...................................................................................................25 Reset Initial Conditions .........................................................................................26 Input/Output Ports.............................................................................28 Pull-high Resistors................................................................................................28 Port A Wake-up ....................................................................................................28 I/O Port Control Registers.....................................................................................30 Pin-shared Functions............................................................................................30 I/O Pin Structures .................................................................................................30 Programming Considerations ...............................................................................30 Contents Rev. 1.00 3 April 7, 2011 |
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