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Interrupt Controller
9-30
9.6
Description of Operation
The following interrupt processing is performed.
• Non-maskable interrupts
NMIRQ pin interrupt
Watchdog timer overflow interrupt
System error interrupt
• Level interrupts
• Internal interrupts
Peripheral interrupts from timer, serial, A/D
• External interrupts
External pin interrupts x 8
In the event of a level interrupt, an interrupt group determination is made, and an interrupt request is sent to the
CPU.
Once the interrupt signal is received, it is determined to be either a non-maskable interrupt or a level interrupt.
If it is a level interrupt, the interrupt group is determined by deciding to which group the interrupt factor belongs.
Once the interrupt group is determined, the interrupt request is sent by manipulating the interrupt control register
(GnICR) for that group in order to notify the CPU of the interrupt group level. The interrupt group number is also
set in the interrupt acceptance group register (IAGR).
The interrupt level of a group can be determined by reading the interrupt priority level register LV2 to 0 in the
interrupt control register (GnICR).
If multiple level interrupt signals are received, the groups to which each belongs is determined and then the interrupt
group with the highest priority level is selected. If the group levels are the same, the group with the smallest group
number is selected.
The processing described above is not performed in the case of a non-maskable interrupt; instead, the non-maskable
interrupt request is simply sent to the CPU.
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...