12
User’s Manual U15400EJ4V0UD
5.4.2
Subsystem clock oscillator .......................................................................................................... 102
5.4.3
Example of incorrect resonator connection ................................................................................. 103
5.4.4
Divider circuit............................................................................................................................... 104
5.4.5
When subsystem clock is not used ............................................................................................. 104
5.4.6
Subsystem clock
× 4 multiplication circuit ...................................................................................104
5.5
Clock Generator Operation .....................................................................................................105
5.6
Changing Setting of System Clock and CPU Clock .............................................................106
5.6.1
Time required for switching between system clock and CPU clock............................................. 106
5.6.2
Switching between system clock and CPU clock ........................................................................ 107
CHAPTER 6 16-BIT TIMER 20............................................................................................................108
6.1
16-Bit Timer 20 Functions .......................................................................................................108
6.2
16-Bit Timer 20 Configuration.................................................................................................108
6.3
Registers Controlling 16-Bit Timer 20....................................................................................110
6.4
16-Bit Timer 20 Operation .......................................................................................................113
6.4.1
Operation as timer interrupt......................................................................................................... 113
6.4.2
Operation as timer output............................................................................................................ 115
6.4.3
Capture operation ....................................................................................................................... 116
6.4.4
16-bit timer counter 20 readout ................................................................................................... 117
6.5
Cautions on Using 16-Bit Timer 20 ........................................................................................118
6.5.1
Restrictions when rewriting 16-bit compare register 20............................................................... 118
CHAPTER 7 8-BIT TIMERS 50, 60, AND 61 ...................................................................................120
7.1
Functions of 8-Bit Timers 50, 60, and 61 ...............................................................................120
7.2
Configuration of 8-Bit Timers 50, 60, and 61.........................................................................122
7.3
Control Registers for 8-Bit Timers 50, 60, and 61.................................................................128
7.4
Operation of 8-Bit Timers 50, 60, and 61 ...............................................................................134
7.4.1
Operation as 8-bit timer counter.................................................................................................. 134
7.4.2
Operation as 16-bit timer counter................................................................................................ 143
7.4.3
Operation as carrier generator .................................................................................................... 149
7.4.4
PWM output mode operation (timer 50) ...................................................................................... 153
7.4.5
Operation as PPG output mode (timer 60 and timer 61) ............................................................. 157
7.5
Cautions on Using 8-Bit Timers 50, 60, and 61.....................................................................160
CHAPTER 8 WATCH TIMER ...............................................................................................................161
8.1
Watch Timer Functions ...........................................................................................................161
8.2
Watch Timer Configuration .....................................................................................................162
8.3
Control Registers for Watch Timer ........................................................................................163
8.4
Watch Timer Operation............................................................................................................165
8.4.1
Operation as watch timer ............................................................................................................ 165
8.4.2
Operation as interval timer .......................................................................................................... 165
CHAPTER 9 WATCHDOG TIMER .......................................................................................................167
9.1
Watchdog Timer Functions.....................................................................................................167