
10
4.4
4.5
Memory Block Function........................................................................................................ 80
Wait Function ......................................................................................................................... 81
4.5.1
Programmable wait function ....................................................................................................... 81
4.5.2
External wait function.................................................................................................................. 82
4.5.3
Relations between programmable wait and external wait ........................................................ 82
Idle State Insertion Function................................................................................................ 83
Bus Hold Function................................................................................................................. 84
4.7.1
Outline of function ....................................................................................................................... 84
4.7.2
Bus hold procedure ..................................................................................................................... 84
4.7.3
Operation in power save mode .................................................................................................. 84
Bus Timing.............................................................................................................................. 85
Bus Priority............................................................................................................................. 92
4.10 Memory Boundary Operation Condition ............................................................................ 92
4.10.1
Program space ............................................................................................................................ 92
4.10.2
Data space................................................................................................................................... 92
4.11 Internal Peripheral I/O Interface .......................................................................................... 93
4.6
4.7
4.8
4.9
CHAPTER 5 INTERRUPT/EXCEPTION PROCESSING FUNCTION.................................................... 95
5.1
Features .................................................................................................................................. 95
5.2
Non-Maskable Interrupt ........................................................................................................ 98
5.2.1
Accepting operation..................................................................................................................... 99
5.2.2
Restore operation ...................................................................................................................... 101
5.2.3
Non-maskable interrupt status flag (NP).................................................................................. 102
5.2.4
Noise elimination of NMI pin..................................................................................................... 102
5.2.5
Edge detection function of NMI pin .......................................................................................... 102
5.3
Maskable Interrupts............................................................................................................. 103
5.3.1
Block diagram............................................................................................................................ 104
5.3.2
Operation ................................................................................................................................... 105
5.3.3
Restore ...................................................................................................................................... 107
5.3.4
Priorities of maskable interrupts ............................................................................................... 108
5.3.5
Interrupt control register (xxICn) .............................................................................................. 112
5.3.6
Edge detection function ............................................................................................................ 114
5.3.7
In-service priority register (ISPR) ............................................................................................. 115
5.3.8
Maskable interrupt status flag (ID) ........................................................................................... 115
5.4
Software Exception ............................................................................................................. 116
5.4.1
Operation ................................................................................................................................... 116
5.4.2
Restore ...................................................................................................................................... 117
5.4.3
Exception status flag (EP) ........................................................................................................ 118
5.5
Exception Trap ..................................................................................................................... 119
5.5.1
Illegal op code definition ........................................................................................................... 119
5.5.2
Operation ................................................................................................................................... 119
5.5.3
Restore ...................................................................................................................................... 120
5.6
Multiple Interrupts ............................................................................................................... 121
5.7
Interrupt Latency Time........................................................................................................ 123
5.8
Periods Where Interrupt is Not Acknowledged............................................................... 124