74
IB811F Series
User’s Manual
B.
Interrupt Request Lines (IRQ)
Peripheral devices use interrupt request lines to notify CPU for the service
required. The following table shows the IRQ used by the devices on board.
Level
Function
IRQ 0
System timer
IRQ 3
Communications Port (COM2)
IRQ 4
Communications Port (COM1)
IRQ 4
PCI Data Acquisition and Signal Processing
Controller
IRQ 5
Communications Port (COM3)
IRQ 5
PCI Data Acquisition and Signal Processing
Controller
IRQ 6
PCI Data Acquisition and Signal Processing
Controller
IRQ 7
PCI Data Acquisition and Signal Processing
Controller
IRQ 8
High precision event timer
IRQ 10
Communications Port (COM4)
IRQ 14
Intel(R) Serial IO GPIO Host Controller -
INT3452
IRQ 25
High Definition Audio Controller
IRQ 35
PCI Data Acquisition and Signal Processing
Controller
IRQ 36
PCI Data Acquisition and Signal Processing
Controller
IRQ 37
PCI Data Acquisition and Signal Processing
Controller
IRQ 39
SDA Standard Compliant SD Host Controller
IRQ 54 ~ IRQ 204
Microsoft ACPI-Compliant System
IRQ 256 ~ IRQ 511
Microsoft ACPI-Compliant System
IRQ 4294967279
Intel(R) USB 3.0 eXtensible Host Controller -
1.0 (Microsoft)