Contents
Program Counter Low Register - PCL..................................................................27
Look-up Table Registers - TBLP, TBHP, TBLH.....................................................27
Status Register - STATUS ...................................................................................27
Oscillator............................................................................................29
Oscillator Overview...............................................................................................29
System Clock Configurations................................................................................29
External Crystal/ Ceramic Oscillator - HXT ..........................................................30
External RC Oscillator - ERC...............................................................................31
Internal RC Oscillator - HIRC...............................................................................31
Internal 32kHz Oscillator - LIRC...........................................................................31
Supplementary Oscillator......................................................................................31
Operating Modes and System Clocks.............................................32
System Clocks......................................................................................................32
System Operation Modes.....................................................................................32
Control Register ...................................................................................................34
Fast Wake-up.......................................................................................................35
Operating Mode Switching...............................................................36
NORMAL Mode to SLOW Mode Switching...........................................................37
SLOW Mode to NORMAL Mode Switching...........................................................38
Entering the SLEEP0 Mode..................................................................................39
Entering the SLEEP1 Mode..................................................................................39
Entering the IDLE0 Mode .....................................................................................39
Entering the IDLE1 Mode .....................................................................................40
Standby Current Considerations...........................................................................40
Wake-up...............................................................................................................40
Programming Considerations ...............................................................................41
Watchdog Timer ................................................................................41
Watchdog Timer Clock Source .............................................................................41
Watchdog Timer Control Register.........................................................................42
Watchdog Timer Operation...................................................................................42
Reset and Initialisation .....................................................................44
Reset Functions ...................................................................................................44
Reset Initial Conditions.........................................................................................47
Input/Output Ports.............................................................................53
I/O Register List....................................................................................................53
Pull-high Resistors................................................................................................55
Port A Wake-up ....................................................................................................56
I/O Port Control Registers.....................................................................................57
I/O Pin Structures .................................................................................................58
Programming Considerations ...............................................................................58
Rev. 1.10
3
February 9, 2011
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