
Preliminary User’s Manual U16541EJ1V0UM
9
4.3.4
Port 3....................................................................................................................................... 123
4.3.5
Port 4....................................................................................................................................... 131
4.3.6
Port 5....................................................................................................................................... 135
4.3.7
Port 7....................................................................................................................................... 140
4.3.8
Port 9....................................................................................................................................... 143
4.3.9
Port CM ................................................................................................................................... 153
4.3.10
Port CT .................................................................................................................................... 156
4.3.11
Port DH.................................................................................................................................... 159
4.3.12
Port DL .................................................................................................................................... 162
4.4
Port Function Operation ....................................................................................................... 176
4.4.1
Write to I/O ports ..................................................................................................................... 176
4.4.2
Read from I/O port................................................................................................................... 176
4.4.3
I/O port calculation .................................................................................................................. 176
CHAPTER 5 BUS CONTROL FUNCTION ........................................................................................... 177
5.1
Features.................................................................................................................................. 177
5.2
Bus Control Pins ................................................................................................................... 178
5.2.1
Pin status when internal ROM, internal RAM, or on-chip peripheral I/O is accessed.............. 178
5.2.2
Pin status in each operation mode .......................................................................................... 178
5.3
Memory Block Function........................................................................................................ 179
5.4
External Bus Interface Mode Control Function .................................................................. 180
5.5
Bus Access ............................................................................................................................ 181
5.5.1
Number of clocks for access ................................................................................................... 181
5.5.2
Bus size setting function ......................................................................................................... 181
5.5.3
Access by bus size.................................................................................................................. 182
5.6
Wait Function......................................................................................................................... 188
5.6.1
Programmable wait function .................................................................................................... 188
5.6.2
External wait function .............................................................................................................. 189
5.6.3
Relationship between programmable wait and external wait .................................................. 190
5.6.4
Programmable address wait function ...................................................................................... 191
5.7
Idle State Insertion Function ................................................................................................ 192
5.8
Bus Hold Function................................................................................................................. 193
5.8.1
Functional outline .................................................................................................................... 193
5.8.2
Bus hold procedure ................................................................................................................. 194
5.8.3
Operation in power save mode ............................................................................................... 194
5.9
Bus Priority ............................................................................................................................ 195
5.10
Boundary Operation Conditions.......................................................................................... 195
5.10.1
Program space ........................................................................................................................ 195
5.10.2
Data space .............................................................................................................................. 195
5.11
Bus Timing ............................................................................................................................. 196
5.11.1
Multiplexed bus ....................................................................................................................... 196
5.11.2
Separate bus ........................................................................................................................... 205
CHAPTER 6 CLOCK GENERATION FUNCTION................................................................................ 214
6.1
Overview................................................................................................................................. 214
6.2
Configuration ......................................................................................................................... 215