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Interrupt Detection
IDE
Detection Circuit
Interrupt
Source
Figure 15.2.2 Internal Block Diagram of Interrupt Controller
Interrupt Detection
Mode IRDM0-1
Low
Level
High
Level
1
Negative
Edge
Edge
Detector
Positive
Edge
Edge
Detector
15-3
Chapter 15 Interrupt Controller
Interrupt Level
Interrupt Mask
IRLVL0-7
Level IRMSK
3
Interrupt
Encoder
Prioritization
Interrupt
Pending
IRPND
3
3
1
IP [2]
Interrupt
IRCS.FL
5
IP [7:3]
Interrupt Cause
IRCS.CAUSE
3
Interrupt Level
IRCS.LVL
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