AT91 datasheet(62/153 Pages) ATMEL

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AT91X40 Series

1354D–ATARM–08/02

AIC Source Mode Register

Access Type:

Read/Write

Reset Value:

Offset:

0x000 - 0x07C

• 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

Program the input to be positive or negative level sensitive or positive or negative edge triggered.

The active level or edge is not programmable for the internal sources.

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SRCTYPE

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PRIOR

SRCTYPE

External Sources

Code Label

AIC_SRCTYPE

Low Level Sensitive

AIC_SRCTYPE_EXT_LOW_LEVEL

Negative Edge Triggered

AIC_SRCTYPE_EXT_NEGATIVE_EDGE

High Level Sensitive

AIC_SRCTYPE_EXT_HIGH_LEVEL

Positive Edge Triggered

AIC_SRCTYPE_EXT_POSITIVE_EDGE

SRCTYPE

Internal Sources

Code Label

AIC_SRCTYPE

Level Sensitive

AIC_SRCTYPE_INT_LEVEL

Edge Triggered

AIC_SRCTYPE_INT_EDGE

AT91 Datasheet(PDF) 62 Page - ATMEL Corporation

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