
ix
4.5.13 DRAM Interface in high-speed Page Mode .................................................................................. 183
4.5.14 Single DRAM Interface Read Cycle ............................................................................................. 187
4.5.15 Single DRAM Interface Write Cycle .............................................................................................. 188
4.5.16 Single DRAM Interface ................................................................................................................. 189
4.5.17 Hyper DRAM Interface Read Cycle .............................................................................................. 190
4.5.18 Hyper DRAM Interface Write Cycle .............................................................................................. 191
4.5.19 Hyper DRAM Interface ................................................................................................................. 192
4.5.20 DRAM Refresh ............................................................................................................................. 193
4.5.21 External Bus Request ................................................................................................................... 195
4.6
Internal Clock Multiplication (Clock Doubler) ..................................................................................... 197
4.7
Sample Program for External Bus Operations ................................................................................... 198
CHAPTER 5
I/O PORT ................................................................................................... 203
5.1
Outline of I/O Port .............................................................................................................................. 204
5.2
Port Data Register (PDR) .................................................................................................................. 205
5.3
Port Direction Register (DDR) ........................................................................................................... 206
5.4
Using External Pins as I/O Ports ....................................................................................................... 207
CHAPTER 6
16-BIT RELOAD TIMER ........................................................................... 211
6.1
Outline of the 16-bit Reload Timer ..................................................................................................... 212
6.2
Block Diagram of the 16-bit Reload Timer ......................................................................................... 213
6.3
Registers of the 16-bit Reload Timer ................................................................................................. 214
6.3.1
Control Status Register (TMCSR) ................................................................................................ 215
6.3.2
16-bit Timer Register (TMR) and 16-bit Reload Register (TMRLR) ............................................. 218
6.4
16-bit Reload Timer Operations ......................................................................................................... 219
6.5
I/O Pin Functions of the 16-bit Reload Timer ..................................................................................... 221
6.6
Counter Operation Statuses .............................................................................................................. 223
CHAPTER 7
PROGRAMMABLE PULSE GENERATOR (PPG) TIMER ....................... 225
7.1
Outline of the PPG Timer ................................................................................................................... 226
7.2
Block Diagram of the PPG Timer ....................................................................................................... 227
7.3
Registers of the PPG Timer ............................................................................................................... 228
7.3.1
Control/Status Register (PCNH/L) ................................................................................................ 229
7.3.2
Cycle Setting Register (PCSR) and Duty Setting Register (PDUT) ............................................. 232
7.4
PWM Mode ........................................................................................................................................ 233
7.5
One-shot Mode .................................................................................................................................. 235
7.6
PPG Timer Interrupt Resources and Timing Charts .......................................................................... 237
CHAPTER 8
EXTERNAL INTERRUPT/NMI CONTROL SECTION .............................. 239
8.1
Outline of the External Interrupt/NMI Control Section ........................................................................ 240
8.2
Registers of the External Interrupt/NMI Control Section .................................................................... 241
8.3
External Interrupt Processing ............................................................................................................ 243
8.4
External Interrupt Request Level ....................................................................................................... 244
8.5
Non-maskable Interrupt (NMI) Processing ....................................................................................... 245
CHAPTER 9
DELAYED INTERRUPT MODULE ........................................................... 247
9.1
Outline of the Delayed Interrupt Module ............................................................................................ 248
9.2
Delayed Interrupt Control Register (DICR) ........................................................................................ 249