iii
2.8
Memory Map......................................................................................................................
47
2.8.1
Memory Map ........................................................................................................
47
2.9
Application Notes ..............................................................................................................
53
2.9.1
Notes on Data Access ...........................................................................................
53
2.9.2
Notes on Bit Manipulation....................................................................................
55
2.9.3
Notes on Use of the EEPMOV Instruction ...........................................................
61
Section 3
Exception Handling
........................................................................................
63
3.1
Overview............................................................................................................................
63
3.2
Reset...................................................................................................................................
63
3.2.1
Overview...............................................................................................................
63
3.2.2
Reset Sequence .....................................................................................................
63
3.2.3
Interrupt Immediately after Reset .........................................................................
65
3.3
Interrupts ............................................................................................................................
65
3.3.1
Overview...............................................................................................................
65
3.3.2
Interrupt Control Registers ...................................................................................
67
3.3.3
External Interrupts ................................................................................................
76
3.3.4
Internal Interrupts..................................................................................................
77
3.3.5
Interrupt Operations..............................................................................................
78
3.3.6
Interrupt Response Time.......................................................................................
83
3.4
Application Notes ..............................................................................................................
84
3.4.1
Notes on Stack Area Use ......................................................................................
84
3.4.2
Notes on Rewriting Port Mode Registers .............................................................
85
Section 4
Clock Pulse Generators
.................................................................................
87
4.1
Overview............................................................................................................................
87
4.1.1
Block Diagram......................................................................................................
87
4.1.2
System Clock and Subclock..................................................................................
87
4.2
System Clock Generator ....................................................................................................
88
4.3
Subclock Generator............................................................................................................
91
4.4
Prescalers ...........................................................................................................................
93
4.5
Note on Oscillators ............................................................................................................
94
Section 5
Power-Down Modes
......................................................................................
95
5.1
Overview............................................................................................................................
95
5.1.1
System Control Registers......................................................................................
98
5.2
Sleep Mode ........................................................................................................................ 102
5.2.1
Transition to Sleep Mode...................................................................................... 102
5.2.2
Clearing Sleep Mode ............................................................................................ 103
5.2.3
Clock Frequency in Sleep (Medium-Speed) Mode .............................................. 103
5.3
Standby Mode .................................................................................................................... 103
5.3.1
Transition to Standby Mode.................................................................................. 103
5.3.2
Clearing Standby Mode ........................................................................................ 104