User’s Manual U14800EJ3V0UD
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CHAPTER 6 PORT FUNCTIONS ...........................................................................................................75
6.1
Port Functions............................................................................................................................75
6.2
Port Configuration .....................................................................................................................77
6.2.1
Port 0 ............................................................................................................................................ 78
6.2.2
Port 1 ............................................................................................................................................ 79
6.2.3
Port 2 ............................................................................................................................................ 80
6.2.4
Port 3 ............................................................................................................................................ 85
6.2.5
Port 5 ............................................................................................................................................ 86
6.3
Registers Controlling Port Function ........................................................................................87
6.4
Port Function Operation............................................................................................................91
6.4.1
Writing to I/O port .......................................................................................................................... 91
6.4.2
Reading from I/O port.................................................................................................................... 91
6.4.3
Arithmetic operation of I/O port ..................................................................................................... 91
CHAPTER 7 CLOCK GENERATOR (
PD789306 SUBSERIES) .......................................................92
7.1
Clock Generator Functions.......................................................................................................92
7.2
Clock Generator Configuration ................................................................................................92
7.3
Registers Controlling Clock Generator ...................................................................................94
7.4
System Clock Oscillators ..........................................................................................................97
7.4.1
Main system clock oscillator.......................................................................................................... 97
7.4.2
Subsystem clock oscillator ............................................................................................................ 98
7.4.3
Examples of incorrect resonator connection ................................................................................. 99
7.4.4
Divider circuit............................................................................................................................... 100
7.4.5
When no subsystem clock is used .............................................................................................. 100
7.5
Clock Generator Operation .....................................................................................................101
7.6
Changing Setting of System Clock and CPU Clock .............................................................102
7.6.1
Time required for switching between system clock and CPU clock............................................. 102
7.6.2
Switching between system clock and CPU clock ........................................................................ 103
CHAPTER 8 CLOCK GENERATOR (
PD789316 SUBSERIES) .....................................................104
8.1
Clock Generator Functions.....................................................................................................105
8.2
Clock Generator Configuration ..............................................................................................105
8.3
Registers Controlling Clock Generator .................................................................................106
8.4
System Clock Oscillators ........................................................................................................109
8.4.1
Main system clock oscillator........................................................................................................ 109
8.4.2
Subsystem clock oscillator .......................................................................................................... 110
8.4.3
Examples of incorrect resonator connection ............................................................................... 111
8.4.4
Divider circuit............................................................................................................................... 114
8.4.5
When no subsystem clock is used .............................................................................................. 114
8.5
Clock Generator Operation .....................................................................................................115
8.6
Changing Setting of System Clock and CPU Clock .............................................................116
8.6.1
Time required for switching between system clock and CPU clock............................................. 116
8.6.2
Switching between system clock and CPU clock ........................................................................ 117