NEC PD789488, PD789489, PD78F9488, PD78F9489 - page 13

User’s Manual U15331EJ4V1UD 13
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.................................................................................................... 150
7.4.4 PWM output mode operation (timer 50)...................................................................................... 154
7.4.5 PPG output mode operation (timer 60 and timer 61)...................................................................158
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 Configuration of Watch Timer ................................................................................................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
9.2 Watchdog Timer Configuration ..............................................................................................168
9.3 Watchdog Timer Control Registers ....................................................................................... 169
9.4 Watchdog Timer Operation..................................................................................................... 171