A - 3

11.

Protection .................................................................................................................................... 124

12.

Interrupts ..................................................................................................................................... 125

12.1

Interrupt Overview ................................................................................................................................ 125

12.1.1

Types of Interrupts ............................................................................................................................ 125

12.1.2

Software Interrupts ........................................................................................................................... 126

12.1.3

Special Interrupts .............................................................................................................................. 127

12.1.4

Peripheral Function Interrupt ............................................................................................................ 127

12.1.5

Interrupts and Interrupt Vectors ........................................................................................................ 128

12.1.6

Interrupt Control ............................................................................................................................... 130

12.2

INT Interrupt ......................................................................................................................................... 139

12.2.1

INTi Interrupt (i = 0 to 3) .................................................................................................................. 139

12.2.2

INTi Input Filter (i = 0 to 3) ............................................................................................................. 142

12.3

Key Input Interrupt ................................................................................................................................ 143

12.4

Address Match Interrupt ........................................................................................................................ 145

12.5

Timer RC Interrupt, Timer RD Interrupt, Clock Synchronous Serial I/O with Chip Select Interrupts, and

12.6

Notes on Interrupts ................................................................................................................................ 149

12.6.1

Reading Address 00000h .................................................................................................................. 149

12.6.2

SP Setting .......................................................................................................................................... 149

12.6.3

External Interrupt and Key Input Interrupt ....................................................................................... 149

12.6.4

Changing Interrupt Sources .............................................................................................................. 150

12.6.5

Changing Interrupt Control Register Contents ................................................................................. 151

13.

Watchdog Timer ......................................................................................................................... 152

13.1

Count Source Protection Mode Disabled .............................................................................................. 156

13.2

Count Source Protection Mode Enabled ............................................................................................... 157

14.

Timers ......................................................................................................................................... 158

14.1

Timer RA ............................................................................................................................................... 161

14.1.1

Timer Mode ...................................................................................................................................... 164

14.1.2

Pulse Output Mode ........................................................................................................................... 166

14.1.3

Event Counter Mode ......................................................................................................................... 168

14.1.4

Pulse Width Measurement Mode ...................................................................................................... 170

14.1.5

Pulse Period Measurement Mode ..................................................................................................... 173

14.1.6

Notes on Timer RA ........................................................................................................................... 176

14.2

Timer RB ............................................................................................................................................... 177

14.2.1

Timer Mode ...................................................................................................................................... 181

14.2.2

Programmable Waveform Generation Mode .................................................................................... 184

14.2.3

Programmable One-shot Generation Mode ...................................................................................... 186

14.2.4

Programmable Wait One-Shot Generation Mode ............................................................................. 190

14.2.5

Notes on Timer RB ........................................................................................................................... 194

14.3

Timer RC ............................................................................................................................................... 198

14.3.1

Overview ........................................................................................................................................... 198

14.3.2

Registers Associated with Timer RC ................................................................................................ 200

14.3.3

Common Items for Multiple Modes ................................................................................................. 210

14.3.4

Timer Mode (Input Capture Function) ............................................................................................. 216

14.3.5

Timer Mode (Output Compare Function) ......................................................................................... 221

14.3.6

PWM Mode ....................................................................................................................................... 227