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Chapter 3 Interrupts
3-1-2
Block Diagram
IRQLVL
III - 4
Overview
PSW
7
6
5
4
3
2
1
0
IM1
IM0
MIE
deter-
mined
IRQNM1
2-0
Figure 3-1-1
Level
7
6
5
NMICR
7
x x x LV1-0
IRQ0ICR
0
1
DEC
2
7
xxx ICR
x x x LV1-0
0
1
DEC
2
Interrupt Block Diagram
Interrupt
CPU core
Vector 1
4
3
2
1
0
PI
Vector 2
6
5
4
3
2
1
0
xxxIE xxxIR
xxxLV : Interrupt Level
xxxIE : Interrupt Enable
xxxIR : Interrupt Request
Vector N
Vector 28
6
5
4
3
2
1
0
xxxIE xxxIR
xxxLV : Interrupt Level
xxxIE : Interrupt Enable
xxxIR : Interrupt Request
WDOG
Peripheral
function
I/O
Peripheral
function
I/O
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