Interrupt Request Lines (Irq) - FabiaTech FX5653 User Manual

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Interrupt Request Lines (IRQ)

There are a total of 15 IRQ lines available on the Industrial CPU Card. Peripheral
devices use interrupt request lines to notify CPU for the service required. The
following table shows the IRQ used by the devices on the Industrial CPU Card.
Level Function
IRQ0 System Timer Output
IRQ1 Keyboard
IRQ2 Interrupt Cascade
IRQ3 Serial Port #2
IRQ4 Serial Port #1
IRQ5 Serial Port #3
IRQ6 Reserved
IRQ7 Serial Port #4
IRQ8 Real Time Clock
IRQ9
IRQ10 Serial Port #5/#7
IRQ11 Serial Port #6/#8
IRQ12 USB/PS2 Mouse
IRQ13
IRQ14 Primary IDE
IRQ15 Reserved
ACPI
FPU
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