User’s Manual U13850EJ6V0UD
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3.4.2
Image ........................................................................................................................................ 104
3.4.3
Wrap-around of CPU address space ........................................................................................ 105
3.4.4
Memory map ............................................................................................................................. 106
3.4.5
Area .......................................................................................................................................... 107
3.4.6
External expansion mode ......................................................................................................... 114
3.4.7
Recommended use of address space ...................................................................................... 117
3.4.8
Peripheral I/O registers ............................................................................................................. 119
3.4.9
Specific registers....................................................................................................................... 126
CHAPTER 4 BUS CONTROL FUNCTION .......................................................................................... 128
4.1
Features................................................................................................................................... 128
4.2
Bus Control Pins and Control Register................................................................................ 128
4.2.1
Bus control pins ........................................................................................................................ 128
4.2.2
Control register ......................................................................................................................... 129
4.3
Bus Access ............................................................................................................................. 129
4.3.1
Number of access clocks .......................................................................................................... 129
4.3.2
Bus width .................................................................................................................................. 130
4.4
Memory Block Function......................................................................................................... 131
4.5
Wait Function.......................................................................................................................... 132
4.5.1
Programmable wait function...................................................................................................... 132
4.5.2
External wait function................................................................................................................ 133
4.5.3
Relationship between programmable wait and external wait .................................................... 133
4.6
Idle State Insertion Function ................................................................................................. 134
4.7
Bus Hold Function.................................................................................................................. 135
4.7.1
Outline of function ..................................................................................................................... 135
4.7.2
Bus hold procedure................................................................................................................... 136
4.7.3
Operation in power save mode ................................................................................................. 136
4.8
Bus Timing .............................................................................................................................. 137
4.9
Bus Priority ............................................................................................................................. 144
4.10 Memory Boundary Operation Conditions ............................................................................ 145
4.10.1
Program space.......................................................................................................................... 145
4.10.2
Data space................................................................................................................................ 145
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION ................................................. 146
5.1
Outline ..................................................................................................................................... 146
5.1.1
Features.................................................................................................................................... 146
5.2
Non-Maskable Interrupt ......................................................................................................... 149
5.2.1
Operation .................................................................................................................................. 150
5.2.2
Restore ..................................................................................................................................... 152
5.2.3
NP flag ...................................................................................................................................... 153
5.2.4
Noise eliminator of NMI pin ....................................................................................................... 153
5.2.5
Edge detection function of NMI pin ........................................................................................... 154
5.3
Maskable Interrupts................................................................................................................ 155
5.3.1
Operation .................................................................................................................................. 155
5.3.2
Restore ..................................................................................................................................... 157
5.3.3
Priorities of maskable interrupts................................................................................................ 158
Содержание V850/SB1
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