Manual

AT75C310
34
AIC Source Mode Register
Register Name: AIC_SMR0..AIC_SMR31
Access Type: Read/write
Reset Value: 0
• PRIOR: Priority Level
Programs 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
Programs 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.
AIC Interrupt Vector Register
Register Name: AIC_IVR
Access Type: Read-only
Reset Value: 0
• PRIOR
Interrupt priority
• IRQID
Active interrupt number. Used to select required service routine.
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76543210
– SRCTYPE –– PRIOR
SRCTYPE Internal Sources External Sources
00
Level-sensitive Low-level sensitive
01
Edge-triggered Negative-edge triggered
10
Level-sensitive High-level sensitive
11
Edge-triggered Positive-edge triggered
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23 22 21 20 19 18 17 16
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15 14 13 12 11 10 9 8
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76543210
PRIOR IRQID