70
MB997
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 1
Standard PS/2 Keyboard
IRQ 4
Communications Port (COM1)
IRQ 3
Communications Port (COM2)
IRQ 5
Communications Port (COM3)
IRQ 5
Communications Port (COM4)
IRQ 5
Communications Port (COM5)
IRQ 5
Communications Port (COM6)
IRQ 11
Intel(R) SMBus - A323
IRQ 12
Microsoft PS/2 Mouse
IRQ 13
Numeric data processor
IRQ 14
Intel(R) Serial IO GPIO Host Controller -
INT3450
IRQ 16
High Definition Audio Controller
IRQ 45
Trusted Platform Module 2.0
IRQ 55 ~ IRQ 204
Microsoft ACPI-Compliant System
IRQ 256 ~ IRQ 511
Microsoft ACPI-Compliant System
IRQ 4294967290
Intel(R) Ethernet Connection (7) I219-V
IRQ 4294967280~87
Intel(R) I211 Gigabit Network Connection
IRQ 4294967279
Intel(R) Management Engine Interface
IRQ 4294967292
Intel(R) PCI Express Root Port #11 - A332
IRQ 4294967293
Intel(R) PCI Express Root Port #5 - A33C
IRQ 4294967294
Intel(R) PCIe Controller (x16) - 1901
IRQ 4294967289
Intel(R) UHD Graphics 630
IRQ 4294967288
Intel(R) USB 3.1 eXtensible Host Controller
- 1.10 (Microsoft)
IRQ 4294967291
Standard SATA AHCI Controller
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