Cortex-A9 Technical Reference Manual: A.3. Interrupts

A.3. Interrupts

Table A.3 shows the interrupt line signals.

Table A.3. Interrupt line signals

Name	I/O	Source	Description
nFIQ	I	Interrupt sources	Cortex-A9 processor FIQ request input line. Active-LOW fast interrupt request: 0 = Activate fast interrupt 1 = Do not activate fast interrupt. The processor treats the nFIQ input as level sensitive.
nIRQ	I	Interrupt sources	Cortex-A9 processor IRQ request input line. Active-LOW interrupt request: 0 = Activate interrupt 1 = Do not activate interrupt. The processor treats the nIRQ input as level sensitive.

Name

I/O

Source

Description

nFIQ

Interrupt sources

Cortex-A9 processor FIQ request input line.

Active-LOW fast interrupt request:

0 = Activate fast interrupt

1 = Do not activate fast interrupt.

The processor treats the nFIQ input as level sensitive.

nIRQ

Interrupt sources

Cortex-A9 processor IRQ request input line.

Active-LOW interrupt request:

0 = Activate interrupt

1 = Do not activate interrupt.

The processor treats the nIRQ input as level sensitive.

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