Advantech PCA-6774 user manual Table C.4 Interrupt assignments, Appx.C

C.4 Interrupt assignments

Table C.4: Interrupt assignments

Interrupt#	Interrupt source
IRQ 0	Interval timer
IRQ 1	Keyboard
IRQ 2	Interrupt from controller 2 (cascade)
IRQ 3	COM2
IRQ 4	COM1
IRQ 5	Unused
IRQ 6	FDD
IRQ 7	LPT1
IRQ 8	RTC
IRQ 9	Reserved (audio)
IRQ 10	Unused
IRQ 11	Reserved for watchdog timer
IRQ 12	PS/2 mouse
IRQ 13	INT from co-processor
IRQ 14	Primary IDE
IRQ 15	Secondary IDE for CFC

*Ethernet interface IRQ select: 9, 11, 15

*PNP audio IRQ select: 9, 11, 15

*PNP USB IRQ select: 9, 11, 15

*PNP ACPI IRQ select: 9, 11, 15

115 Appx.C