![background image](http://html2.mh-extra.com/html/ibase-technology/si-323-n/si-323-n_user-manual_3230549061.webp)
Appendix
SI-323-N User Manual
53
D. 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 4294967292
PCI Express Root Port
IRQ 0
High precision event timer
IRQ 0
System timer
IRQ 8
High precision event timer
IRQ 7
AMD GPIO Controller
IRQ 4294967282
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967281
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967280
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967279
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967278
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967277
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967276
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4294967275
AMD USB 3.10 eXtensible Host Controller - 1.10
(Microsoft)
IRQ 4
Communications Port (COM1)
IRQ 3
Communications Port (COM2)
IRQ 53
High Definition Audio Controller
IRQ 53
AMD Audio CoProcessor
IRQ 54
AMD High Definition Audio Controller
IRQ 54
Microsoft ACPI-Compliant System
IRQ 4294967285
AMD Radeon(TM) Vega 11 Graphics
IRQ 4294967284
AMD Radeon(TM) Vega 11 Graphics
IRQ 4294967283
AMD Radeon(TM) Vega 11 Graphics
IRQ 55
Microsoft ACPI-Compliant System