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1745D–ATARM–04-Nov-05
AT91M55800A
15.10.1 AIC Source Mode Register
Register Name: AIC_SMR0...AIC_SMR31
Access Type: Read/Write
Reset Value: 0
• PRIOR: Priority Level (Code Label AIC_PRIOR)
Program the priority level for all sources except source 0 (FIQ).
The priority level can be between 0 (lowest) and 7 (highest).
The priority level is not used for the FIQ, in the SMR0.
• SRCTYPE: Interrupt Source Type (Code Label AIC_SRCTYPE)
Program the input to be positive or negative edge-triggered or positive or negative level sensitive.
The active level or edge is not programmable for the internal sources.
31 30 29 28 27 26 25 24
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
––––––––
76543210
–
SRCTYPE
––
PRIOR
SRCTYPE
Internal
Sources Code Label Internal
External
Sources Code Label External
00
Level
Sensitive
AIC_SRCTYPE_INT_LEVEL_SENSITIVE
Low-level
Sensitive
AIC_SRCTYPE_EXT_LOW_LEVEL
01
Edge-
triggered
AIC_SRCTYPE_INT_EDGE_TRIGGERED
Negative
Edge-
triggered
AIC_SRCTYPE_EXT_NEGATIVE_EDGE
10
Level
Sensitive
AIC_SRCTYPE_INT_LEVEL_SENSITIVE
High-level
Sensitive
AIC_SRCTYPE_EXT_HIGH_LEVEL
11
Edge-
triggered
AIC_SRCTYPE_INT_EDGE_TRIGGERED
Positive Edge-
triggered
AIC_SRCTYPE_EXT_POSITIVE_EDGE